UDC 669.14-41 JAPANESE INDUSTRIAL Cold-reduced STANDARD carbon sheets and strip steel @® JIS G 3141-» Translated and Published by Japanese Standards Printed in Japan Association 14S In the event of any doubt arising, the original Standard in Japanese is to be final authority Errata for JIS (English edition) are printed in Standardization Journal, published monthly by the Japanese Standards Association Errata will be provided upon request, please contact: Business Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, JAPAN 107 TEL 03-3583-8002 FAX 03-3583-0462 Errata are also provided to subscribers of JIS (English edition) in Monthly Information , ) + UDC JAPANESE INDUSTRIAL Cold-reduced sheets carbon and 669.14-41 STANDARD J1I15 steel G 3141-1996 strip Scope This Japanese Industrial Standard specifies the cold-reduced carbon steel sheets, coils and strip (hereafter referred to as “steel sheet and coil"), including the cold rolled strip steel (steel coils less than 500 mm in width during cold rolling) and also the cut lengths therefrom Remarks The standards Table The International Standard is given in the following: ISO A cited 3574-1986 part of shall be in commercial the Standard are given corresponding carbon and corresponding to steel drawing this sheet qualities International in Attached Standard of Standard in this Standard is given in the Annex This Annex applicable instead of the requirements specified in 2., and 10 of this text subclassified Tables this Cold-reduced Quality and symbol The steel three categories and their symbols given in and according 3, Symbol to the respectively Table Remarks sheet shall of Symbol and coil shall be as given in temper of grade quality SPCD Drawing SPCE Deep the temper steel grade surface finish Remarks Commercial sheet and quality quality drawing and quality coil as~-annealed of one standard in quality SPCC are requested by the purchaser to guarantee tensile test values, letter symbol T shall be suffixed to the symbol of quality, thus appears SPCCT When the steel sheet and coil of standard temper grade in quality SPCE are requested by the purchaser to guarantee non-aging property, letter symbol is l1., be classified into Table They quality SPCC When and listed symbol N shall be suffixed to the of quality, thus appears SPCEN as G 3141-1996 Table Temper grade Temper grade Symbol of temper As~annealed Standard A temper grade Dull 1/4 hard 1/2 hard Full hard Remarks: finish | Symbol surface finish Bright finish This table is as-annealed Mechanical S 1/8 hard Table Surface grade Surface finish of Remarks finish D A matt finish roughened its chemically B A smooth finished not applicable to produced with a roll surface mechanically finish produced with its surface smoothly the steel sheet and or a roll coil properties 3.1 Tensile strength, elongation and non-aging property The steel sheet and coil of standard temper grade and as~-annealed one shall be tested in accordance with 10., and their tensile strength, elongation and non-aging properties shall be as given in Table G 3141~1996 Table Symbol} of quali-| Tensile strength, elongation Tensile strength and Elongation 2% Tensile test piece Discrimination 0.25 or over | according to nominal 0.25 over or |0.40 to | over 0.40 0.60 1.0 1.6 (34 min.) (36 min.) (37 min.) and excl or | 0.60 to| over thickness and excl or | 1.0 or} over to and excl (270 min.) (32 min.) SPCD 270 min.| 34 | 36 | 38 | 39 SPCE 270 min.! 36 | 38 | 40 | 41 Remarks 2.5 (38 | min.) 42 43 min For those than This When the steel sheet and coil of standard temper grade quality SPCE are specified non-aging property (SPCEN), shall be guaranteed for six months after shipment from manufacturer's factory Hardness and full shall table The hard be is steel shall as 0.60 mm in applicable to those sheet given be be and tested in Table Table Temper omitted coil in grade | Symbol temper of 30 of grades applicable to as the however, thickness, accordance not tion (SPCCT) by the purchaser, shall be applied shall is tensile less rule, mm or 10 the a rule, over 1/8 hard, with and of 50 to 71 1/4 hard 65 to 80 | 115 to 150 1/2 74 to 89 | 135 to 185 85 | 170 Full hard Remarks: As to hardness, applied their HV 1/8 hard hard either HRB 95 to 130 or HV in this the 1/4 hard, Hardness HRB SPCC values in width Hardness grade No 5, in rolling direc- 41 min a (39 | min.)} 40 as 2.5 or The test value, 1.6 or} over When specified in parentheses tensile test mm to and | to and | over excl excl SPCC hardness property N/mm2 ty 3.2 hard non-aging shall be 1/2 ` G 3141-1996 3.3 Bendability accordance with 10 The and this case, the test the outside surface However, 1/2 hard, for the bend steel sheet the piece shall of the bent the steel test grade Symbol temper grade coil withstand portion sheet shall and shall of SPCC being coil be carried Table Temper and bendability of out be shall as bent tested in Table 1/8 hard, without grades on be given request by of Bend Bend angle | Inside radius | Bend on itself | No Standard grade S 180° Flat on on itself itself 180° Flat 1/4 hard 180° Thickness x 0.5 1/2 hard 180° Thickness x 1.0 - as of size follows: The size of the (1) The size of the steel length in millimeter, (2) The size of the steel coil shall in millimeter, respectively coil Table Standard 500 mm dimensions or over steel sheet shall be respectively The in width Table standard during be sheet expressed expressed thickness cold rolling Standard sheet and by by of and coil Remarks: 0.5 1.8 the direction thickness, thickness the shall 0.6 2.0 0.7 2.3 coil shall steel be as sheet given dimensions mm 0.8 0.9 1.0 1.2 1.4 2.5 (2.6) 2.8 (2.9) 3.2 The standard thickness not should preferably be used in parentheses of be width and Unit: Standard 10.4 thickness |, in - The bend test may be omitted for the steel as~annealed and of standard temper grade Expression and piece test | rolling hard expressed test piece, 1/8 hard purchaser test Flat Remarks: In on Bendability 180° hard 1/4 the A Full in cracking As-annealed temper and width and in G 3141-1996 6, Dimensional tolerances 6.1 Position of dimensions shall (1) For the measurement on be as follows: steel sheet on thickness and shall regular be made both side edges In the however, the measurement fr { Á dimensions on width shall be any place for the (3) Measurement on 6.2 Thickness (1) The thickness tolerances shall The thickness tolerances shall (2) given in Table and Table shall The Table position of the not of steel less be made at regular steel sheet made thickness 9, at any coil, place be applied to be classified respectively Thickness tolerances, for for the shall the as nominal into class the from steel steel be on measurement than 30 mn, position portion tolerances measurement than 15 mm apart case where the width is less shall be made at a mid-width Measurement coil and at tolerances portion at any point (2) length The sheet follows: thickness classes A and B as A Unit: Discrimination to & nominal according Discrimination thickness width + Q.03 + 0.03 + 0.03 - - - - | 0.25 or over to and + 0.04 | + 0.04 + 0.04 0.40 1600 over or over to and ‡ 0,05 +0,05 + 0,05 + 0,06 0.06 or over excl 0.80 to and + 0.06 + 0.06 + 0.06 + 0.06 + 0.07 0.80 or over excl, 1,00 to and + 0.06 + 0.06 + 0.07 + 0.08 + 0,09 1.00 or over excl 1.25 to and + 0,07 + 0.07 + 0.08 + 0.09 + 0.11 1.25 or over excl 1.60 to and + 0,08 + 0,09 t 0.10 + 0.11 + 0.13 1.60 or over excl 2.00 to and + 0.10 + 0,11 + 0,12 + 0.13 + 0.15 2.00 to and + 0,12 + 0,13 + 0.14 + 0,15 + 0,17 excl excl or nominal 630 or 1000 or 1250 or over to over to over to and excl | and excl | and excl 1000 1250 1600 Under 0.40 to Under 630 excl 0.25 according mm 0.60 or over 2.50 - G 3141-1996 ay Table (continued) Unit: Discrimination to nominal thickness 2.50 or over excl 3.15 3.15 or according to Discrimination Under 630 and over Table according 630 or over to 1000 over 1000 1250 and to nominal or to excl | and 1250 over excl.| and 1600 or to 0.14 + 0.15 + 0.16 + 0.17 + 0.16 +0.17 + 0.19 + 0.20 Thickness tolerances, class 1600 over excl + width + 0.20 - B Unit: Discrimination according nominal thickness to Discrimination Under 160 according 160 or over to and excl.| Under 0.10 to ~ - + 0.020 - - to and excl 0.16; + 0.16 or over to and excl 0.25| + 0.020 | + 0.025 ‡ 0,030 0.25 or over to and excl 0.40} + 0.025 | + 0.030 + 0.035 or 0.80 over to 630 + 0.020 over 0.60 width + 0.010 | or 0.015 | + 0.035 |+ 0.040 |+ and excl 0,80 | + 0.040 | + or over to and excl 1.00/ + 0.04 1.00 or over to and excl 1.25] 1.25 or over to and excl 1.60 or over to and 2.00 or over 2.50 or over 3.15 or over 0.045 mm 400 or over to and excl 400 0.10 0.40 or over to and excl 0.60| nominal 250 or over to and excl.} 250 or + 0.030 + 0,035 0.040 | + 0.040 + 0.045 + 0.045 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.05 + 0.06 1.60| + 0.05 + 0.06 + 0.06 + 0.06 excl 2.00| + 0.06 + 0.07 + 0.08 + 0.08 to and excl 2.50; + 0.07 + 0.08 + 0.08 + 0.09 to and excl 3.15] + 0.08 + 0.09 + 0.09 + 0.10 + 0.09 + 0.10 + 0.10 + 0.11 e > G 3141-1996 The width tolerances shall be as follows: 6.3 Width tolerances (1) The width (2) The width tolerances shall be classified into classes A, given in Table 10, Table 11 and Table 12, respectively tolerances Table shall be applied Width 10 to the nominal tolerances, Unit: Discrimination to nominal Under B and C as A mm according width 1250 | 1250 +7 Remarks: class width or over +10 The plus side tolerances shall not be applied to the stretcher-levelled steel sheet Table 11 Width tolerances, class Unit: Discrimination nominal width Under according 1250 1250 or +3 Table 12 B mm to over +4 Width tolerances, class C Unit: Discrimination nominal according thickness Discrimination to Under 160 160 Under 0.60 to according or 250 over to and excl.| 250 width nominal or 400 or over to and excl.| 400 over to and excl 630 + 0.15 + 0.20 + 0.25 + 0,30 0.60 or over to and excl 1.00] + 0.20 + 0.25 + 0.25 ‡ 0.30 1.00 or over to and excl 1.60} + 0.20 + 0.30 + 0.30 + 0.40 1.60 or over to and excl 2.50; + 0.25 + 0.35 + 0.40 + 0.50 2.50 or over to and excl 4.00/ + 0.30 + 0.40 + 0.45 + 0.50 4.00 or over to and excl 5.00] + + 0.50 0.55 t+ 0.65 0.40 + mm G 3141-1996 6.4 Length tolerances The (1) The length tolerances steel sheet (2) The tolerances given in Table on 13 length shall shall applied the to be 13 Length Discrimination nominal length tolerances, according to class Unit: A and the B as mm over to and excl 4000 +15 4000 or over to and excl, 6000 +20 + ) * > The plus side tolerances shall not be applied to the stretcherlevelled steel sheet 14 Length Discrimination nominal length Under A of Tolerances or Table length classes 2000 Remarks: follows: +10 2000 Under as nominal length shall be classified into and Table 14, respectively Table be tolerances tolerances, according to 1000 class B Unit: mm Tolerances +3 1000 or over to and excl 2000 +4 2000 or over to and excl 3000 +6 3000 or over to and excl 4000 +8 0 Shape ge ww 7.1 Flatness The flatness tolerances shall be classified into class A and class B as given in Table 15 and Table 16, respectively These tables shall be applied to the steel sheet of standard temper grade which is 500 mm or over in width during cold rolling 10 G 3141-1996 Table 17 Maximum value of camber Unit: Discrimination according to nominal width Product Cut Under in Coil 2000 | 2000 in or over length to and excl 60 8 in any 2000 length 60 or over to and excl 630 4 in any 2000 length 2 in any 2000 length The the values specified in this irregular portion of the table steel shall coil not be applied to Mass 8.1 Mass (1) The mass (3) or cut-length 30 or over Remarks: (2) coil lengths length | 630 or over form, mm of steel sheet of the steel The mass sheet of shall the steel sheet be expressed shall be in kilogram as follows: The theoretical mass shall generally be applied for the steel sheet 500 mm or more in width during cold rolling, and the actual mass shall be applied for the steel sheet under 500 mm in width during cold rolling The method accordance for with calculation Table The standard mass in width shall be 18 of using mass the of the nominal steel of a single bundle of the 2000 kg, 3000 kg and 4000 sheet dimensions steel kg shall sheet 500 be in mm or more c) 11 G 3141~1996 Table Sequence Basic of 18 Calculation calculation mass procedure Calculation kg/mm-m? | 7.85 (mass per m* area) of theoretical method per mm mass Rounding off rule of calculated result thickness kg/m* | Basic mass (kg/mm-m2) thickness (mm) _ ~ Unit mass Area of steel Mass of single sheet kg | Unit (m2) Mass of single bundle Mass of single sheet (kg) kg | x number of sheets per | Rounded integer off to in kg kg | Sum Integer in sheet m2|Width (m) mass bundle Total mass Remarks same mass Rounded x area size of each bundle off of steel (1) The mass of For the mass kilograms coil the of The steel the mass coil steel of the shall coil, be the values steel the For the steel coil of (b) For the steel coil less Appearance steel The sheet appearance and coil 500 maximum mm or more than shall shall be coil actual generally be designated, and the specified be not less than the following values: (a) shall to figures as oiled, kg mass of be in accordance shall be as one mass of maximum in width; 500 mm in width; be Rounded off significant Rounding with JIS numerical to figures off of the Z 8401 to figures significant The total mass may be calculated by multiplying the single sheet (kg) by the total number of sheets Mass (m) (kg/m*) of of length Rounded off significant 8.2 (2) x x follows: expressed each mass in coil shall kg/mm kg/mm a shall usually of width of width follows: (1) The unless otherwise specified (2) The steel sheet and coil shall be free from such defects as hole, lamination and other imperfections that are detrimental to practical use Provisions on defects other than hole and lamination, however, shall generally be applied to one side of the surface(!) of the steel Sheet and coil For the steel coil, however, some irregular portions and welds may be included therein, since generally the steel coil is afforded opportunity to inspect readily and to remove such defective parts no 12 G 3141-1996 Note (1) The term “one side of the surface" the top of outside (3) each package surface for for the the steel means, steel as a rule, sheet coil and the For the steel sheet and coil of as~annealed grade, the coil break, edge wave, etc caused by omission of skin pass shall not be regarded as detrimental defects (4) For the unoiled steel by omission of oiling 10 Mechanical sheet shall and not coil, the rust, scratch, etc caused be regarded as detrimental defects test 10.1 General requirements for mechanical test The general requirements for mechanical testing shall be in accordance with the specifications in (Mechanical properties) of JIS G 0303 With this method of specimen shall conform to class A, and and the sampling position shall be as follows: (1) respect, the Number of test pieces One test piece shall be coil defined in cold rolling process (hereafter In the case where the mass of test piece shall be taken from one to heat the same thickness treatment under the conditions rolling sampling of test pieces taken from each steel referred to as “coil”) the single coil each lot of the same the number is less than t, same heat, rolled conditions and the same (2) Sampling position of test piece The centre of each test piece shall be at a quarter-width When it is infeasible, however, the sampling should be made as close to the aforementioned position as possible 10.2 Test piece 10.2.1 Tensile the following: (1) As to a used (2) The 10.2.2 Z 2245 test (1) As (2) The test method The piece, method No piece, No shall as test bend test test be The The method tensile shall test test to a test used, test test test Hardness 10.2.3 Bend following: and test shall piece specified shall shall test be be piece be as specified be carried specified in as JIS in JIS specified in JIS as given Z 2201 in shall be Z 2241 specified carried out out in JIS as in JIS Z 2248 given Z 2244 in Z 2204 or JIS the shall be 13 G 3141-1996 Inspection General 0303 The inspection requirements The mechanical in for shall inspection properties shall The dimensional tolerances shall (4) The shape conform the (5) The mass (6) The appearance shall shall to conform shall to the conform carried shall conform (3) in be be conform to follows: specified in JIS requirements the specified requirements in G specified requirements specified requirements the as as to the requirements to out specified in specified in 12 Packaging and marking The steel sheet and coil which have passed the inspection shall, as a rule, be packed and clearly marked with the following details by suitable means When approved by the purchaser, however, a part of the details given below may be omitted (1) Symbol of quality (2) Symbol of temper (3) Symbol of surface (4) Manufacture (5) Dimensions (6) Number of sheets or mass (this may be omitted for cut lengths therefrom which are cold-rolled under (7) Manufacturer's Remarks: grade number name finish or inspection or its identifying An example of marking and surface finish SPCCT -S number on the 500 strip steel and mm in width) brand symbols of quality, temper grade D mm finish Temper Quality grade (Dull (Standard (Commercial properties finish) temper quality, are guaranteed) grade) mechanical 14 G 3141-1996 cy Attached Table rules Cited JIS G 0303 General JIS Z 2201 Test pieces JIS Z 2204 Bend test JIS Z 2241 Method of tensile test JIS Z 2244 Method of Vickers hardness JIS Z 2245 Method of Rockwell JIS Z 2248 Method of bend JIS Z 8401 Rules Iso 1024 Metallic Iso 6507-1 Metallic materials HV5 to HV100 ISo 6508 for for for inspection tensile pieces for test of for off metallic metallic materials test superficial metallic of materials materials Rockwell for steel for metallic and test rounding standards hardness materials numerical values 30 Hardness test — Rockwell N, 45 N, 15 T, 30 T and ~ Hardness test -—- Vickers Metallic materials A~B-C-D-E-F-G-H-K) Hardness test ~ Rockwell T150 6892 Metallic materials Tensile 7438 Metallic materials Bend T150 test materials (scales 15 N, test superficial 45 T) test test — Part 1: (scales testing test noth 15 G 3141-1996 Annex Foreword chemical property This tests is requirements and Annex composition, of commercial Standard It Cold-reduced Scope not has allowed field made out qualities) in the sheet based properties, to apply of steel in ISO 3574-1986 drawing specified and been qualities mechanical specified and carbon drawing which only commercial the scope, sampling (Cold-reduced corresponds a part text on of of this and references, mechanical carbon to the Annex steel text instead of of sheet this the application 1.1 This Annex applies and drawing qualities prime importance to It cold-reduced carbon steel sheet of is suitable for applications where commercial surface is of 1.2 Commercial quality sheet (CR1) is intended for general fabricating purposes where sheet is used in the flat or for bending, moderate forming, and welding operations It is produced in thickness of 0.36 mm and thicker (commonly produced up to mm) and in widths of 600 mm and over, in coils and cut lengths 1.3 Drawing quality sheet (CR2, CR3, CR4) is intended for drawing or severe forming, including welding It is produced in thicknesses of 0.36 mm and wider, thicker in coils Drawing 1.4 (commonly and cut qualities produced are ~ drawing CR3 - deep drawing quality CR4 - deep drawing quality Cold-reduced will be References to mm) identified CR2 and up lengths as and in widths of 600 mm and follows: quality sheet considered less as special than sheet 600 killed mm wide (non~aging) may be slit from Iso 1024 Metallic materials test (scales 15 N, - Hardness test - Rockwell 30 N, 45 N, 15 T, 30 T and ISO 6507-1 Metallic materials HV5 to HV100 — Hardness test - Iso 6508 Metallic materials —- Hardness test - Rockwell ISO 6892 Metallic materials — Tensile Iso 7438 Metallic materials - (scales A-B-~C-D-E-F-G-H-K) Bend testing test Vickers wide sheet superficial 45 T) test test - Part 1: 16 G 3141-1996 not Chemical exceed composition the values Annex The given Table l chemical composition in Annex Table Chemical composition Quality Values c (cast (cast as analysis) shall analysis) percentages Mn by mass P § Designation Name CR1 Commercial 0.15 max | 0.60 max | 0.05 max | 0.05 max CR2 Drawing 0.12 max | 0.50 max | 0.04 max | 0.04 max CR3 Deep 0.10 max | 0.45 max.; 0.03 max | 0.03 max CR4 Deep drawing special killed 0.08 max | 0.45 max | 0.03 max, | 0.03 max drawing (non-aging) Mechanical Annex Table 3, dance with The indicated shipment the values in properties The mechanical when they are determined on requirements specified Annex Annex Table Table 2 of clause in Annex from the properties shall be as given in test pieces obtained in accor- Table time are that Applicable period in Annex Table Designation applicable the for Period CR2 days CR3 days CR4 months steel values is for the periods available specified for G 3141-1996 3# uy 943 G9GHH TT9⁄920WN 19†T†ddng 1O pu£ 3ueT†eArnba 128£q21nd su ouq4 pea2xa uaø412q 03 30u po1329dxe 13uoueo1j# uo *3ueũdiT†8 SỊ 4998 p9AOTTE 1E 101 2TqETTEAE 9pEU 8T 3T 9113 T2238 TH2 Á3†Twnb go ssoupiey SonTEA I0£ 943 syL 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HH pueq 19938 % *xeu - JL0£3H (;)889up1EH 392us 18 G 3141-1996 Sampling 5.1 Tensile and hard tests One representative sample for the tensile test (that is also to be used for the hardness test) required in Annex Table shall be taken from each lot of sheet for shipment A lot consists of and 5.2 50 only t or Bend of condition sheet test One of all sheet to CR1) consists less condition Mechanical shall of the same representative be taken of the from same sample each quality §mall cracks eye, Annex for the of sheet rolled to bend to for the the same thickness test (applicable same thickness shipment A lot and test shall be carried out in accordance piece shall be taken midway between the rolled 6.2 Bend test (applicable only to shall withstand being bent through Fig and around an inside radius cracking on the outside of the bent carried out at ambient temperature _ lot rolled property tests 6.1 Tensile test The tensile with ISO 6892 Transverse test centre and edge of the sheet as the naked quality on the shall Fig edges of CR1) The transverse bend test piece 180°, in the direction shown in Annex as given in Annex Table 3, without portion The bend test shall be and in accordance with ISO 7438 test pieces, be disregarded Transverse bend test and cracks piece (after not visible to bending) Rolling direction 6.3 with Hardness ISO 1024, test ISO The 6507-1 hardness or ISO test 6508 shall on the be carried test pieces out in accordance specified in 6.1 ) 19 G 3141-1996 Informative reference Introduction This Informative reference gives chemical composition and mechanical properties, at the time of contract, but does not form part the supplement to the and matters to be attended of this Standard Informative reference Symbol of quality Cc Table l Chemical Mn values) analysis (cast The chemical composition Chemical composition shall be as given in Informative reference Table composition Unit: P % S SPCC 0.12 max | 0.50 max | 0.040 max | 0.045 max SPCD 0.10 max | 0.45 max | 0.035 max | 0.035 max SPCE 0.08 max | 0.40 max | 0.030 max | 0.030 max, Remarks: For hard, the steel 1/4 hard, sheet 1/2 and hard coil and of grades full hard, 1/8 increment of hardness is achieved sometimes by changing their chemical composition instead of by temper rolling 2.1 Mechanical The properties combination of the symbol of quality, finish, and items of mechanical properties in Informative reference Table to temper be grade applied and shall surface be as given G 3141-1996 20 O O O O - 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reference the No - the thickness of 0.25 mm width of 30 mm or over specifies Test % hard grade Tensile test values of 1/8 hard, 1/4 hard, 1/2 hard and full hard 1/8 hard Full 3.1 57 Symbol | Tensile grade the Table and HV A grade grade Hardness HRB As-annealed temper of grades 1/8 hard, 1/4 hard, Informative reference Tables required) of over It times the and is of ordering values for recommended contract that 24 G 3141-1996 (8) Allowable range on ordered quantity (9) Date and method (10) Maximum (11) Inside (12) Designation (13) Use Note mass of single of quantity of delivery diameter (') total of and of shipment in comparison with destination coil coil (if required) unoiling (if required) For the steel in coil form and cut lengths therefrom which have been cold rolled under 500 mm in width, they shall be designated as the "cold rolled strip steel” at the time of ordering 3.2 Mechanical properties items shall be in accordance remarks 3.3 supplied Temper in rolling (1) The coil the Standard (2) The strip and surface rolled 500 following cold temper cold Standard At the time of ordering, the specification with Informative reference Table and its mm grade rolled temper finish The conditions, or and grade more dull under 500 and steel unless sheet otherwise in width and and coil specified: cut are lengths: finish mm in width bright and cut lengths: finish 3.4 Dimensional tolerance and flatness Unless otherwise specified, the dimensional tolerances and flatness mentioned below are applied In other cases, specific class(es) shall be designated (1) The coil cold rolled Thickness length (2) The cold Thickness and 3.5 Others temper grade tolerance, tolerance, strip length Where is 500 or class class rolled tolerance, denotation and 500 class class this more A, A, under tolerance, necessary, mm of width B the matter in width width date and cut tolerance, flatness, mm B, in width shall class and of skin be class A cut tolerance, pass lengths: A, lengths: class for specifically B, the standard designated |