BS EN 10088-2:2014 BSI Standards Publication Stainless steels Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes BS EN 10088-2:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 10088-2:2014 It supersedes BS EN 10088-2:2005 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee ISE/105, Steels for Heat Treatment, Alloy Steels, FreeCutting Steels and Stainless Steels A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 76855 ICS 77.140.20; 77.140.50 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2014 Amendments/corrigenda issued since publication Date Text affected BS EN 10088-2:2014 EN 10088-2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM October 2014 ICS 77.140.20; 77.140.50 Supersedes EN 10088-2:2005 English Version Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes Aciers inoxydables - Partie 2: Conditions techniques de livraison des tôles et bandes en acier de résistance la corrosion pour usage général Nichtrostende Stähle - Teil 2: Technische Lieferbedingungen für Blech und Band aus korrosionsbeständigen Stählen für allgemeine Verwendung This European Standard was approved by CEN on August 2014 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 10088-2:2014 E BS EN 10088-2:2014 EN 10088-2:2014 (E) Contents Page Foreword Introduction Scope Normative references Terms and definitions 4.1 4.2 Designation and ordering .6 Designation of steel grades Designation to be used on ordering Classification of grades 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 Requirements Steelmaking process .8 Delivery condition Chemical composition Chemical corrosion properties .8 Mechanical properties Surface quality .8 Internal soundness Formability at room temperature Dimensions and tolerances on dimensions and shape Calculation of mass and tolerances on mass .9 7.1 7.2 7.3 7.3.1 7.3.2 7.4 7.5 Inspection and testing General Agreement on tests and inspection documents 10 Specific inspection and testing 10 Extent of testing 10 Selection and preparation of samples and test pieces 10 Test methods 10 Retests 11 Marking 11 Annex A (informative) Guidelines for further treatment (including heat treatment) in fabrication 51 Annex B (informative) Applicable dimensional standards 57 Bibliography 58 BS EN 10088-2:2014 EN 10088-2:2014 (E) Foreword This document (EN 10088-2:2014) has been prepared by Technical Committee ECISS/TC 105 “Steels for heat treatment, alloy steels, free-cutting steels and stainless steels”, the secretariat of which is held by DIN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 10088-2:2005 This standard mainly differs from the 2005 edition as follows: a) addition of austenitic grades 1.4618, 1.4376, 1.4640, 1.4646, addition of austenitic-ferritic (duplex) grades 1.4162, 1.4662, 1.4482, 1.4062, addition of ferritic grades 1.4600, 1.4607, 1.4611, 1.4613, 1.4630, 1.4634; b) chemical composition was changed for following grades: austenitic grade 1.4371, 1.4597, austeniticferritic grade 1.4362; c) standard inspection document is now a test report 2.2 according to EN 10204; d) products delivered with hot-rolled or cold-rolled finishes shall be supplied with a prime surface; e) a new cold rolled surface finish (2A) has been introduced for ferritic stainless steel grades that have been 'bright-pickled and skin passed;' f) mechanical values have been changed for austentic grade 1.4372, for ferritic grades 1.4016 and for martensitic grade 1.4034 EN 10088, under the general title Stainless steels, consists of the following parts: — Part 1: List of stainless steels (including a table of European Standards, in which these stainless steels are further specified, see Annex B); — Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes [the present document]; — Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes; — Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes; — Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 10088-2:2014 EN 10088-2:2014 (E) Introduction The European Organization for Standardization (CEN) draws attention to the fact that it is claimed that compliance with this document may involve the use of patents applied to seven steel grades CEN takes no position concerning the evidence, validity and scope of these patent rights The holder of these patent rights has ensured CEN that they are willing to negotiate licenses, under reasonable and non-discriminatory terms and conditions, with applicants throughout the world In this respect, the statements of the holders of these patent rights are registered with CEN Information may be obtained from: Grade 1.4162, 1.4662 Outokumpu Stainless AB SE-77480 Avesta, Sweden Grade 1.4062 Ugitech F-73403 Ugine Cedex, France Grade 1.4062 Industeel F-71200 Creusot, 56 Rue Clemenceau, France Grade 1.4646, 1.4611, 1.4613 Acciai Speciali Terni I-05100 Terni, Italy BS EN 10088-2:2014 EN 10088-2:2014 (E) Scope This European Standard specifies the technical delivery conditions for hot or cold rolled sheet/plate and strip of standard grades and special grades of corrosion resisting stainless steels for general purposes NOTE General purposes include the use of stainless steels in contact with foodstuffs The general technical delivery conditions specified in EN 10021 apply in addition to the specifications of this European Standard, unless otherwise specified in this European Standard This European Standard does not apply to components manufactured by further processing of the product forms listed above with quality characteristics altered as a result of such further processing Normative references The following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 10021, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels — Part 1: Steel names EN 10027-2, Designation systems for steels — Part 2: Numerical system EN 10052:1993, Vocabulary of heat treatment terms for ferrous products EN 10079:2007, Definition of steel products EN 10088-1:2014, Stainless steels — Part 1: List of stainless steels EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 2: Plate and wide flats EN 10168, Steel products — Inspection documents — List of information and description EN 10204, Metallic products — Types of inspection documents EN 10307, Non-destructive testing — Ultrasonic testing of austenitic and austenitic-ferritic stainless steels flat products of thickness equal to or greater than mm (reflection method) EN ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-1) EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (ISO 377) EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid (ISO 3651-2) EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1) EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1) EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-1) BS EN 10088-2:2014 EN 10088-2:2014 (E) EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO 68921) EN ISO 6892-2, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature (ISO 6892-2) EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition (ISO 14284) Terms and definitions For the purposes of this document, the terms and definitions regarding types of heat-treatment in EN 10052:1993, regarding product forms in EN 10079:2007 and the following apply 3.1 stainless steels steels with at least 10,5 % of chromium and maximum 1,2 % of carbon [SOURCE: EN 10020:2000, 3.2.2] Note to entry: Stainless steels are further subdivided in accordance with their main property into corrosion resisting steels, heat resisting steels and creep resisting steels Note to entry: One type steel in Table in EN 10088-1:2014 and five types of steel in Table in EN 10088-1:2014 contain less chromium than the minimum defined for stainless steels, but are included in the heat-resisting and creepresisting steels standards respectively, because they form a part of these two families of steels 3.2 corrosion resisting steels steels with at least 10,5 % Cr and max 1,20 % C if their resistance to corrosion is of primary importance 3.3 general purposes purposes other than the special purposes mentioned in the Bibliography 3.4 standard grades grades with a relatively good availability and a wider range of application 3.5 special grades grades for special use and/or with limited availability Designation and ordering 4.1 Designation of steel grades The steel names and steel numbers (see Tables to 4) were formed in accordance with EN 10027-1 and EN 10027-2 respectively 4.2 Designation to be used on ordering The complete designation for ordering a product according to this document shall contain the following information: — desired quantity; BS EN 10088-2:2014 EN 10088-2:2014 (E) — product form (strip or sheet/plate); — where an appropriate dimensional standard is available (see Annex B) the number of the standard, plus any choice of requirements; — if there is no dimensional standard, the nominal dimensions and tolerances required; — type of material (steel); — number of this document; — steel name or steel number; — if for the relevant steel in the table for the mechanical properties more than one treatment condition is covered, the symbol for the desired heat treatment or cold worked condition; — desired process route (see symbols in Table 6); — if a verification of internal soundness is required, flat products with thickness ≥ mm shall be tested in accordance with EN 10307; — any additional optional tests or inspections (see 7.2.3 d)); — standard designation for a test report 2.2 or, if required, any other type of inspection document in accordance with EN 10204 (see 7.2.1) EXAMPLE 10 plates according to EN ISO 18286 with thickness = mm, width = 2000 mm, length = 000 mm; tolerances on width and length class B, flatness tolerance class N made of steel EN 10088–2 with the name X5CrNi18–10 and the number 1.4301 in process route 1D (see Table 6), inspection certificate 3.1 as specified in EN 10204: 10 plates EN ISO 18286 —, × 2000 × 5000 B Steel EN 10088–2 — X5CrNi18–10+1D EN 10204 — 3.1 or 10 plates EN ISO 18286 —, × 2000 × 5000 B Steel EN 10088–2 — 1.4301+1D EN 10204 — 3.1 Classification of grades Steels covered in this document are classified according to their structure into: — austenitic steels, — austenitic-ferritic steels, — ferritic steels, — martensitic steels, — precipitation hardening steels See also EN 10088-1:2014, Annex C BS EN 10088-2:2014 EN 10088-2:2014 (E) Requirements 6.1 Steelmaking process Unless a special steelmaking process is agreed at the time of enquiry and order, the steelmaking process for steels conforming to this document shall be at the discretion of the manufacturer 6.2 Delivery condition The products shall be supplied in the delivery condition agreed at the time of enquiry and order by reference to the process route given in Table and, where different alternatives exist, to the treatment conditions given in Tables to 11, 17 and 18 (see also Annex A) 6.3 Chemical composition 6.3.1 The chemical composition requirements given in Tables to apply with respect to the chemical composition according to the cast analysis 6.3.2 The product analysis may deviate from the limiting values for the cast analysis given in Tables to by the values listed in Table 6.4 Chemical corrosion properties Referring to resistance to intergranular corrosion as defined in EN ISO 3651-2, for austenitic and austeniticferritic and ferritic steels the specification in Tables 7, and applies NOTE EN ISO 3651-2 is not applicable for testing martensitic and precipitation hardening steels NOTE The corrosion resistance of stainless steels is very dependent on the type of environment and can therefore not always be clearly ascertained through laboratory tests It is therefore advisable to draw on the available experience of the use of the steels 6.5 Mechanical properties 6.5.1 The mechanical properties at room temperature as specified in Tables to 11 apply for the relevant specified heat treatment condition This does not apply to the process route 1U (hot rolled, not heat treated, not descaled) If by agreement at the time of ordering the products are to be supplied in a non-heat-treated condition, the mechanical properties specified in Tables 7, 8, 9, 10 and 11 shall be obtained from reference test pieces which have received the appropriate heat treatment (simulated heat treatment) For cold worked products, the tensile strength levels at ambient temperature as specified in Table 17 apply The available tensile strength levels in the cold worked condition are indicated in Table 19 Alternatively, cold worked products can be ordered according to their 0,2 %-proof strength as given in Tables 18 and 20 NOTE Austenitic steels are insensitive to brittle fracture in the solution annealed condition As they not have a pronounced transition temperature, which is characteristic of other steels, they are also useful for application at cryogenic temperatures 6.5.2 The values in Tables 12 to 16 apply for the 0,2 %- and %-proof strength at elevated temperatures 6.6 Surface quality Slight surface imperfections, inherent in the rolling process, are permitted BS EN 10088-2:2014 EN 10088-2:2014 (E) Table 20 — Available 0,2 %-proof strength levels of steel grades in the cold worked condition (process route 2H) Steel designation Name Available 0,2 %-proof strength level Number +CP350 +CP500 +CP700 +CP900 +CP1100 Standard grades X6Cr17 1.4016 X X - - - X2CrNiN18–7 1.4318 - X X - - X10CrNi18–8 1.4310 - X X X X X5CrNi18–10 1.4301 X X X X X X6CrNiTi18–10 1.4541 X X - - - a a X5CrNiMo17–12–2 1.4401 X X - - - X6CrNiMoTi17–12–2 1.4571 X X - - - Special grades 46 X6CrNiNb18–10 1.4550 X X - - - X8CrMnCuNB17–8-3 1.4597 X X X - - X12CrMnNiN17–7-5 1.4372 - X X X X X2CrMnNiN17–7-5 1.4371 - X X - - X9CrMnNiCu17–8-5–2 1.4618 X X X X - X12CrMnNiN18–9-5 1.4373 - X X - - X11CrNiMn19–8-6 1.4369 - X X X X a For higher Rp0,2 values see EN 10151 b Higher values up to proof strength level +CP1300 may be agreed b EN 10088-2:2014 (E) Table 21 — Tests to be carried out, test units and extent of testing in specific testing a Test Test unit Product form Strip and sheet cut from strip (C, H) in rolling width < 600 mm Chemical analysis Tensile test temperature at room Rolled plate (P) Number of test pieces per test sample ≥ 600 mm m Cast The cast analysis is given by the manufacturer.b mc Same cast, same nominal thickness ± 10 %, same final treatment condition (i.e same heat treatment and/or same degree of cold deformation) The extent of testing shall be agreed at the time of ordering test sample from each coil a) Plates processed under identical conditions may be collected into a batch with a maximum total weight of 30 000 kg comprising no more than 40 plates One test sample per batch shall be taken from heat treated plates up to 15 m in length One test sample shall be taken from each end of the longest plate in the batch where heat treated plates are longer than 15 m b) If the plate cannot be tested in batches, one test sample shall be taken from one end from heat treated plates up to 15 m long and one test sample shall be taken from each end of heat treated plates longer than 15 m me,f To be agreed at the time of ordering (see Table 10) Tensile test at elevated temperature o To be agreed at the time of ordering (see Tables 12 to 16) Impact test temperature room og To be agreed at the time of ordering (see Tables 7, and 10) Resistance to intergranular corrosion oh To be agreed at the time of ordering if intergranular corrosion is a hazard Hardness test martensitic steelsd at on (see Tables 7, and 9) a Tests marked with a “m” (mandatory) shall be carried out as specific tests in all cases Those marked with an “o” (optional) shall be carried out as specific tests only if agreed at the time of enquiry and order b Product analysis may be agreed at the time of enquiry and order; the extent of testing shall be specified at the same time c Except for martensitic steels in heat treatment condition +A (see, however, footnote e) d Hardness test on martensitic steels is to be performed on the product surface e f g h Mandatory for heat treatment condition +A However, in cases of dispute or at the manufacturer's discretion, the tensile test may be carried out Mandatory for product form C in heat treatment condition +QT For austenitic steels, the impact test is normally not carried out (see NOTE in 6.5.1) Test for resistance to intergranular corrosion is normally not carried out The tests are not relevant for austenitic steel grades with a carbon content below 0,040 % 47 BS EN 10088-2:2014 EN 10088-2:2014 (E) Table 22 — Marking of the products Marking of: Products with specific testing Manufacturer's name, trade mark or logo a without specific testing + + (+) (+) + + (+) (+) + + + (+) (+) (+) Nominal thickness (+) (+) Nominal dimensions other than thickness (+) (+) Inspector's mark (+) - Customer's order No (+) (+) The number of this document Steel number or name Type of finish Cast number b Identification number Direction of rolling a c a Symbols in the table mean: + = the marking shall be applied; (+) = the marking shall be applied if so agreed, or at the manufacturer's discretion - = no marking necessary 48 b If specific tests are to be carried out, the numbers or letters used for identification shall allow the product(s) to be related to the relevant inspection certificate c Direction of rolling is normally obvious from the shape of the product and the position of the marking Marking may either be longitudinally applied by roller stamping or it may be near to one end of the piece and transverse to the rolling direction A specific separate indication of the principal rolling direction will not normally be required, but may be requested by the customer BS EN 10088-2:2014 EN 10088-2:2014 (E) Type of test piece a Tensile Product thickness t Direction of the longitudinal axis of the test piece in relation to the principal direction of rolling at a final rolling width of: mm < 300 mm ≥ 300 mm ≤ 30 longitudinal transverse longitudinal transverse Distance of the test piece from the rolled surface mm > 30 Impact a b > 10 In cases of doubt or dispute the gauge length shall be Lo = 5,65 √So for test pieces from products t ≥ mm For products t < mm thickness, non-proportional test pieces with a gauge length of 80 mm and a width of 20 mm shall be used, but test pieces with a gauge length of 50 mm and a width of 12,5 mm may also be applied For products with a thickness mm < t ≤ 10 mm, flat proportional test pieces with two rolled surfaces and a maximum width of 30 mm shall be used For products with a thickness t > 10 mm, one of the following proportional test pieces shall be used: either a flat test piece with a maximum thickness of 30 mm; the thickness may be reduced to 10 mm by machining, but one rolled surface shall be preserved; or a round test piece with a diameter of ≥ mm the axis of which shall be located as close as possible plane in the outer sixth of the product thickness t b c to a Longitudinal axis of the notch shall always be perpendicular to the rolled surface of the product In the case of product thickness greater than 30 mm, the impact test piece may be taken at quarter of the product thickness Key rolled surface Figure — Position of test pieces for flat products 49 BS EN 10088-2:2014 EN 10088-2:2014 (E) Key rolling direction Figure — Direction of bending the test piece in relation to the rolling direction in the resistance to intergranular corrosion test 50 BS EN 10088-2:2014 EN 10088-2:2014 (E) Annex A (informative) Guidelines for further treatment (including heat treatment) in fabrication A.1 The guidelines given in Tables A.1 to A.5 are intended for hot forming and heat treatment A.2 Flame cutting may adversely affect edge areas; where necessary, they should be machined A.3 As the corrosion resistance of stainless steels is only ensured with a metallically clean surface, layers of scale and annealing colours produced during hot forming, heat treatment or welding should be removed as far as possible before use Finished parts made of steels with approximately 13 % Cr also require the best surface condition (e.g polished) in order to achieve maximum resistance to corrosion a Table A.1 — Guidelines on the temperatures for hot forming and heat treatment of austenitic corrosion resisting steels Steel designation Name Hot forming Number Temperature °C Heat treatment symbol Solution annealing Temperatureb,c,d Type of cooling °C Type cooling of Standard grades X2CrNiN18–7 1.4318 1020 to 1100 X10CrNi18–8 1.4310 1010 to 1090 X2CrNi18–9 1.4307 1000 to 1100 X8CrNiS18–9 1.4305 1000 to 1100 X2CrNiN18–10 1.4311 1000 to 1100 X5CrNi18–10 1.4301 1000 to 1100 X6CrNiTi18–10 1.4541 1000 to 1100 X2CrNi19–11 1.4306 1000 to 1100 X4CrNi18–12 1.4303 X2CrNiMoN17–11–2 1.4406 1030 to 1110 X2CrNiMo17–12–2 1.4404 1030 to 1110 X5CrNiMo17–12–2 1.4401 1030 to 1110 X6CrNiMoTi17–12–2 1.4571 1030 to 1110 X2CrNiMo17–12–3 1.4432 1030 to 1110 X2CrNiMo18–14–3 1.4435 1030 to 1110 X2CrNiMoN17–13–5 1.4439 1060 to 1140 X1NiCrMoCu25–20–5 1.4539 1060 to 1140 1150 to 850 air +AT 1000 to 1100 water, air e 51 BS EN 10088-2:2014 EN 10088-2:2014 (E) Steel designation Name Hot forming Number Temperature °C Heat treatment symbol Solution annealing Temperatureb,c,d Type of cooling °C Type cooling of Special grades X5CrNiN17–7 1.4319 1000 to 1100 X5CrNiN19–9 1.4315 1000 to 1100 X5CrNiCu19–6-2 1.4640 1000 to 1100 X6CrNiNb18–10 1.4550 1020 to 1120 X1CrNiSi18–15–4 1.4361 1100 to 1160 X8CrMnCuNB17–8-3 1.4597 1000 to 1100 X8CrMnNi19–6-3 1.4376 1020 to 1100 X12CrMnNiN17–7-5 1.4372 1000 to 1100 X2CrMnNiN17–7-5 1.4371 1000 to 1100 X9CrMnNiCu17–8-5–2 1.4618 1000 to 1100 X12CrMnNiN18–9-5 1.4373 1000 to 1100 X11CrNiMnN19–8-6 1.4369 1000 to 1100 X6CrMnNiCuN18–12–4-2 1.4646 1000 to 1100 X1CrNi25–21 1.4335 X6CrNiMoNb17–12–2 1.4580 X3CrNiMo17–13–3 1.4436 1030 to 1110 X2CrNiMoN17–13–3 1.4429 1030 to 1110 X2CrNiMoN18–12–4 1.4434 1070 to 1150 X2CrNiMo18–15–4 1.4438 1070 to 1150 X1CrNiMoN25–22–2 1.4466 1070 to 1150 X1CrNiMoCuNW24–22–6 1.4659 1140 to 1200 X1CrNiMoCuN20–18–7 1.4547 1200 to 1000 1150 to 1200 X1CrNiMoCuN24–22–8 1.4652 1200 to 1000 1150 to 1200 X2CrNiMnMoN25–18–6-5 1.4565 1200 to 950 1120 to 1170 X1CrNiMoCuN25–25–5 1.4537 1150 to 850 1120 to 1180 X1NiCrMoCuN25–20–7 1.4529 1120 to 1180 X1NiCrMoCu31–27–4 1.4563 1070 to 1150 1150 to 850 air +AT 1030 to 1110 1030 to 1110 water, air e a Temperatures of solution annealing shall be agreed for simulated heat-treated test pieces b Solution annealing may be omitted if the conditions for hot working and subsequent cooling are such that the requirements for the mechanical properties of the product and the resistance to intergranular corrosion as defined in EN ISO 3651-2 are obtained c If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded d Lower end of the range specified for solution annealing should be aimed at the heat treatment as part of further processing, because otherwise the mechanical properties might be affected If the temperature of hot forming does not drop below the lower temperature for solution annealing, a temperature of 980 °C is adequate as a lower limit for Mo-free steels, a temperature of 1000 °C for steels with Mo contents up to % and a temperature of 1020 °C for steels with Mo contents exceeding % e Cooling sufficiently rapidly in order to avoid the occurrence of intergranular corrosion as defined in EN ISO 3651-2 52 BS EN 10088-2:2014 EN 10088-2:2014 (E) Table A.2 — Guidelines on the temperatures for hot forming and heat treatmenta of austenitic-ferritic corrosion resisting steels Steel designation Name Hot forming Number Temperature °C Type of cooling Heat treatment symbol Solution annealing Temperatureb Type of cooling °C Standard grades X2CrNiN23–4 1.4362 X2CrNiMoN22–5-3 1.4462 1150 to 950 air +AT 950 to 1050 water, airc 1020 to 1100 Special grades X2CrNiN22-2 1.4062 1100 to 950 X2CrNiMoSi18–5-3 1.4424 1150 to 1000 1000 to 1100 X2CrNiCuN23–4 1.4655 1150 to 1000 950 to 1050 X2CrMnNiN21–5-1 1.4162 1100 to 900 1020 to 1080 X2CrMnNiMoN21–5-3 1.4482 1150 to 950 950 to 1050 X2CrNiMnMoCuN24–43–2 1.4662 1150 to 900 1000 to 1150 X2CrNiMoCuN25–6-3 1.4507 1150 to 1000 1040 to 1120 X2CrNiMoN25–7-4 1.4410 X2CrNiMoCuWN25–7-4 1.4501 X2CrNiMoN29–7-2 1.4477 a air +AT 980 to 1100 water, airc Temperatures of solution annealing shall be agreed for simulated heat-treated test pieces b If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred or even exceeded c Cooling sufficiently rapidly in order to avoid precipitation 53 BS EN 10088-2:2014 EN 10088-2:2014 (E) Table A.3 — Guidelines on the temperatures for hot forming and heat treatmenta of ferritic corrosion resisting steels Steel designation Name Hot forming Number Temperature Heat treatment symbol Annealing Temperature b Type of cooling °C Type of cooling °C Standard grades X2CrNi12 1.4003 1100 to 800 air +A 700 to 760 X2CrTi12 1.4512 770 to 830 X6CrNiTi12 1.4516 790 to 850 X6Cr13 1.4000 750 to 810 X6CrAI13 1.4002 750 to 810 X6Cr17 1.4016 770 to 830 X3CrTi17 1.4510 770 to 830 X3CrNb17 1.4511 790 to 850 X6CrMo17–1 1.4113 790 to 850 X2CrMoTi18–2 1.4521 820 to 880 air, water Special grades X2CrMnNiTi12 1.4600 1100 to 800 air +A 650 to 700 X2CrSiTi15 1.4630 820 to 880 X1CrNb15 1.4595 770 to 830 X2CrTi17 1.4520 820 to 880 X2CrNbZr17 1.4590 870 to 930 X6CrNi17–1 1.4017 750 to 810 X2CrTiNb18 1.4509 870 to 930 X2CrAlSiNb18 1.4634 900 to 950 C2CrNbTi20 1.4607 870 to 930 X2CrTi21 1.4611 870 to 930 X2CrNbCu21 1.4621 850 to 950 X2CrTi24 1.4613 870 to 930 X5CrNiMoTi15–2 1.4589 750 to 800 X2CrMoTi17–1 1.4513 820 to 880 X6CrMoNb17–1 1.4526 800 to 860 X2CrMoTi29–4 1.4592 900 to 1000 air, water a Temperature of annealing shall be agreed for simulated heat-treated test-pieces b If heat-treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded 54 BS EN 10088-2:2014 EN 10088-2:2014 (E) Table A.4 — Guidelines on the temperatures for hot forming and heat treatment a of martensitic corrosion resisting steels Steel designation Name Hot forming Number Heat Temperature Type °C of cooling treatment symbol Annealing b Quenching b Tempering Temperature Type Temperature Type °C of cooling °C of Temperature °C cooling Standard grades X12Cr13 1.4006 1100 to air 800 X15Cr13 1.4024 1100 to air 800 X20Cr13 1.4021 1100 to 800 X30Cr13 1.4028 1100 to 800 X39Cr13 1.4031 1100 to 800 X46Cr13 X38CrMo14 1.4034 1.4419 X3CrNiMo13–4 1.4110 1.4313 slow cooling slow cooling 1100 to slow 800 cooling 1100 to slow cooling 800 X55CrMo14 slow cooling 1100 to slow 800 cooling 1150 to air 900 X50CrMoV15 X4CrNiMo16–5-1 1.4116 1.4418 +A 750 to 810 - - - - +QT550 - - 950 to 1010 oil, air 700 to 780 +QT650 - - +A 750 to 810 - - - - +QT550 - - 950 to 1050 oil, air 700 to 780 +QT650 - - +A 730 to 790 - - - - +QT - - 950 to 1050 oil, air 200 to 350 +QT650 - - 950 to 1010 +QT750 - - +A 730 to 790 - - - - +QT - - 950 to 1050 oil, air 200 to 350 +QT800 - - 950 to 1010 +A 730 to 790 - - - - +QT - - 1000 to 1100 oil, air 200 to 350 +A 730 to 790 - - - - +QT - - 1000 to 1100 oil, air 200 to 350 +A 750 to 830 - - - - +QT - - 1000 to 1100 oil, air 200 to 350 +A 750 to 830 - - - - +QT - - 1000 to 1100 oil, air 200 to 350 +QT780 - - 950 to 1050 560 to 640 +QT900 - - oil, air, water +A 770 to 830 - - - - 620 to 700 660 to 700 620 to 700 1.4122 650 to 730 510 to 590 1100 to slow 800 cooling 1150 to air +QT840 - - 900 to 1000 oil, air, water 570 to 650 slow cooling +A 770 to 830 - - - - +QT - - 1000 to 1100 oil, air 200 to 350 +A 900 to 1000 - - - - +QT800 - - 900 to 1050 oil, air 600 to 640 +A 900 to 1000 - - - - +QT800 - - 900 to 1050 oil, air 600 to 640 900 X39CrMo17–1 700 to 780 1100 to 800 Special grades X1CrNiMoCu12– 1.4422 5-2 X1CrNiMoCu12– 7-3 1150 to air 900 1.4423 1150 to 900 air 55 BS EN 10088-2:2014 EN 10088-2:2014 (E) Steel designation Name Hot forming Number Heat Temperature Type °C of cooling treatment symbol Annealing b Quenching b Tempering Temperature Type Temperature Type °C of cooling °C of Temperature °C cooling a Temperatures of annealing, quenching and tempering shall be agreed for simulated heat-treated test pieces b If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded Table A.5 — Guidelines on the temperatures for hot forming and heat treatment a of precipitation hardening corrosion resisting steels Steel designation Name Hot forming Number Heat treatment Temperature Type of °C cooling symbol Stress relieving Solution annealing Precipitation hardening Temperature Type of Temperature Type of Temperature °C cooling b cooling °C °C Special grades X5CrNiCuNb16–4 1.4542 1150 to Air +AT - - 1025 to 1055 air - +P850 - - 1025 to 1055 air h (610 to 900 630) +P900 - - h (590 to 610) +P950 - - h (580 to 600) +P1070 - - h (540 to 560) +P1300 - - h (470 to 490) +SR 630 ≥4h - - - - (600 to 660)c X7CrNiAl17–7 1.4568 +AT - - 1030 to 1050 air - +P1450 - - 10 d h (500 to 945 to 965 520) a Temperatures of solution annealing shall be agreed for simulated heat-treated test pieces b If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded c After martensitic transformation Solution annealing at 1025 °C to 1055 °C will be necessary before precipitation hardening d Quick cooling to ≤ 20 °C; cooling within h to −70 °C; holding time h; reheating in air to +20 °C 56 BS EN 10088-2:2014 EN 10088-2:2014 (E) Annex B (informative) Applicable dimensional standards EN 10048, Hot rolled narrow steel strip — Tolerances on dimensions and shape EN ISO 9444-2, Continuously hot-rolled stainless steel — Tolerances on dimensions and form — Part 2: Wide strip and sheet/plate (ISO 9444-2) EN ISO 9445-1, Continuously cold-rolled stainless steel — Tolerances on dimensions and form — Part 1: Narrow strip and cut lengths (ISO 9445-1) EN ISO 9445-2, Continuously cold-rolled stainless steel — Tolerances on dimensions and form — Part 2: Wide strip and plate/sheet (ISO 9445-2) EN ISO 18286, Hot-rolled stainless steel plates — Tolerances on dimensions and shape (ISO 18286) 57 BS EN 10088-2:2014 EN 10088-2:2014 (E) Bibliography [1] EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels [2] EN 10095, Heat resisting steels and nickel alloys [3] EN 10151, Stainless steel strip for springs — Technical delivery conditions [4] EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 1: General requirements [5] EN 10302, Creep resisting steels, nickel and cobalt alloys [6] CEN/TR 10261, Iron and steel — European standards 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