Jis g 3117 1987 rerolled steel bars for concrete reinforcement

UDC 669.14.004.86-422 : 691.328 ~ JAPANESE — INDUSTRIAL STANDARD Rerolled Steel Bars for Concrete Reinforcement SỐ @ JIS G 3117+ a> | Se /) Thông YinTEĐLCL—' Translated } and | i N60 JJese | Published by Japanese Standards Printed in Japan | Association 78 Translation without guarantee In the event of any doubt arising, the original standard in Japanese is to be evidence UDC 669 14.004 86-422: 691,328 JAPANESE G) INDUSTRIAL Rerolled STANDARD JIS Steel Bars for Concrete Reinforcement , , G 3117-1987 Scope This Japanese Industrial Standard specifies the rerolled steel bars, hereinafter referred to as the "steel bars", used for concrete reinforcement Remark: The units and numerical values given in { are in accordance and are appended Further, Standard values p — Classification on and with the International for reference } in this Standard System of Units the tradiitonal units and numerical values in this shall be converted to the SI units and numerical Jan 1, 1991 * Symbols The steel bars shall be divided into classes and their symbols as given in Table 1-1 or Table 1-2 Table 1-1 Symbols of Classes (applicable till the end Division Rerolled plain bars Rerolled Symbols steel deformed bars Applicable (SI), shall be of 1990) of classes SRR 24 SDR 24 SDR 30 SDR 35 SRR 30 steel Standards: JIS G 0303-General JIS G 3191-Shape, JIS Z 2201-Test Pieces JIS Z 2204-Bend Test JIS Z 2241- Method JIS Z 2248-Method Bars Rules for Inspection Dimension, and Weight Bar-in-Coil for Tensile Pieces of Bend and Test for Metallic of Tensile Test Test of Steel Tolerance for Hot for Metallic Materials Materials for Metallic Materials for Metallic Materials Rolled Steel / ; G ` 3117-1987 Table 1-2 Symbols of Classes (applicable on and after Symbols Division Rerolled SI plain steel bars Rerolled Mechanical 1, \ 1991) of classes unit (Reference) Traditional unit SRR 235 SRR 24 SDR 235 SDR 24 SDR 295 SDR 30 SDR 345 SDR 35 SRR 295 deformed - gteel bars Jan ` - SRR 30 ` an Properties Cố » The steel bars shall be tested in accordance with 7.1 and their yield point or 0.2 % of proof stress tensile strength, elongation, and bend shall be as given in Table 2-1 or Table 2-2, Further, in the Table Division Mechanical Symbol of ¥ield point Nai mm : SRR 30] - SDR 24] formed steel SDR 35) (!} Table Division | Tensile Hư An? mi’ 24 (285 The 2-2 Symbol of class 35 (343 )min, {Yield point or proof stress(') |{382 to 588) 45 to 63 ber SRR 2938] 295 235 235 min, shall Tensile arenes mm 440 to 620 380 to 590 235| 235 steel SDR 295] + 345 295 440 to 620 345 min, 490 to 690 Note (7) 20 m Equival on the outside of 1990) end Bend |———— Bending — angle Inner side radius : 18 tape [1:8 times nominal ——] tone * ~ I 16 be based Properties SDR SDR Elongalion & tang he Hà 380 to 590 till the [1459 (0 s88) Rerolled deformed bar No |iaa7 4G 618} N/mm? SRR generated 39 to 60 proof stress Mechanical be Tensile test piece (N/mm?} }min shall (applicable : oC) 30 (294 }min Rerolled plain steel Properties } 24 (235 no cracks SDR 30] 30 (294 }min |, 447 to 618) bar Note (N/mm? SRR 24] Rerolled de- test, 2-1 class Rerolled plain steel] bar bending on 0.2 (applicable Tensile on Elonge- test piece | tion % No $ of permanent and strain after Jan Bending angle 1, 1991) Bend Inner side radius 20 18 ¬ 1801 ° 1.5 times nominal diameter Ặ > : quivalent to No, 16 The proof stress shall be based on 0.2 % of permanent strain (, G 3117-1987 Shape, Size, Mass and Their Tolerances and SRR SRR The following are the specifications Rerolled Plain Steel Bar 4.1 for the of SRR 30 (applicable till the end of 1990) or rerolled plain steel bars of The diameter, diameter conform to Table and 235 and (1) steel bars of rerolled plain tolerance mass and size, its tolerance t (applicable 295 SRR Table Diameter and on tolerances 1, Jan after deviation Diameter, Diameter Tolerances Deviation of Diameter Tolerances Deviation shall be 1991) as of diameter(*) 24 follows: shall and Unit: mm of diameter ~ + 0.4 Within 70 % of total range of tolerances on diameter 13 Note (2) (7) The Unless otherwise and deviation of diameter is expressed specified, shall be as given in Table the tolerances on length Table the length shall conform Standard 35 | 40 | Table 5.5 45 | 5.0 Tolerances Length and the section to Table Length Unit: 60 | 6.5 | on 70 | 75 | m 80 Length Tolerances m or under +40 mm Add Over by the difference between the maximum value minimum value of diameter in the same 7m mm to plus side tolerances given above for every m or its fraction, but not exceed a maximum value of 120 mm 4 G 3117-1987 (3) The mass tolerances when rerolled set according to the designation plain steel bars of purchaser are measured shall conform as one to Table However, the mass tolerances shall be obtained by calculating the difference between the calculated mass and the actual measured mass divided by the calculated mass as expressed by percentage Table Mass Tolerances Rerolled Diameter Plain for One Remarks + mm, mm 13 mm Set of Steel Bars Tolerances t7% £5 % The same size bars shall grouped into one set be 4.2 Rerolled Deformed Steel Bars Rerolled deformed steel bars SDR 24, SDR 30 and SDR 35 (applicable till the end of 1990) or rerolled deformed steel bars of SDR 235, SDR 295 and SDR 345 (applicable on and after Jan 1, 1991) shall be the steel bars having surface protrusions (of surface protrusions, axial and protrusion tolerances (1) is called a rib shall conform and others, to the knots) following: The knots shall be distributed over embossed, the and their shape, mass the entire length of the rerolled deformed bar at approximately uniform intervals, and shall be similar in shape and dimensions When characters or the like are knots in angle of the knots these locations may be omitted (2) The (3) The spacing between the neighbouring knots of deformed be within 70 % of the nominal diameter of the bar (4) The sum of gaps(*) of deformed perimeter of deformed bar bar Note knot (3) Where the rib to the axis of the bar shall be and the connected, the width to be the gap of the knot The shall be are within located 45° or over 25 apart bar shall % of the and nominal where the deformed bar has no rib, the width of defect of the knot shall be considered the gap and where the knot and the rib are (5) size, height of knots than the values relative Table Designation D 6, D8 to the given in Table Height number D10, D13 | of the rib nominal shall diameter of Knot Minimum height value of of knot 4.0 % of nominal diameter be considered shall be not less G 3117-1987 The size, Table (6) unit vat diameter| kg/m mm “¢!6! tion area (4) P ermissible perlmeter [Maximum (8) (+) cm? em _ {value of mm ~— limits of knots Height of mm mm 44 0.3 0.6 5.0 D8 0.389 7.94 0.495 25 5.6 0.3 0.6 6.3 D10 0.560 9.53 0.7133 3.0 GT 0.4 0.8 1S D13 0.995 4.0 g9 05 1.0 10.0 The 1.267 method of calculating figures follows: Nominal eross sectional given in Table Height of knots: shall be rounded off to a numerical value having off to a numerical The calculated value according off to one place of decimal D to 4.2 The calculated value according off to one place of decimal Unless otherwise specified, the length shall be as given and the tolerances on length shall conform to Table (8) The Where 10, D 13 mass shall be as only one piece of rerolled measured, D8 on Mass the tolerances shall Tolerances of One Tolerance - 8% 47% places of of decimal (7) tolerances shall be as 0.785 4x41 ($S) =——Tgg——: area Gap of knots: The calculated value according be rounded off to one place of decimal D6, mm 2.0 Spacing between knots: 4,2 (3) shall be rounded Designation knots 0.3167 Unit mass = 0.785 x S It shall be rounded value having places of significant figures 9, Jrotal 6.35 Nominal perimeter (L) =0.3142xd: It shall be rounded off to one-place Table Maximum knots 0.249 It shall be rounded significant figures (a) a D6 12.7 to mum| value |ÊV@Pag [Minimum|Maxi oŸ spacing | vaiue value gaps of of knots Remark: shall conform Limits of Knots and Permissible Unit Mass Nominal | Nominal Nominal | sectional Designa-} Size, Table limits of knots the permissible and mass to (4) to 4.2 shall (5) in Table , follows: deformed conform steel bar is sampled to Table Piece of Rerolled Deformed to be Steel Bar Remark The sampling method of specimen and the calculating method of tolerances shall conform to 7.2 (2) 6 G 3117-1987 (b) Where rerolled Table 10 D6, D D measured set according Set of Rerolled Deformed Tolerance £5 shall conform to to Remark +7?% 13 as one the tolerances of One Steel Bars D8 10, are of purchaser, Mass Tolerances Designation steel bars the designation Table 10 The sampling method of specimen and the calculating method of tolerances % shall conform to 7.2 (2) Appearance The steel bars Materials The (1) shall be free from defects injurious to use - & and Manufacturing Methods materials Rerolled and plain manufacturing steel bar methods SRR 24 and (applicable till the end of 1990) of steel rerolled bars shall be deformed as follows: steel bar SDR or rerolled plain steel bar SRR 24 235 and rerolled deformed steel bar SDR 235 (applicable on and after Jan 1, 1991) shall be manufactured by using the rolled steel for rerolling generated in the way to manufacture of steel products, the section steel and steel sheet pile generated on the marked, or the steel plates for hull as materials and by rerolling them (2) Rerolled plain steel bar SRR 30 and rerolled deformed steel bars SDR 30 and SDR 35 (applicable till the end of 1990) or rerolled plain steel bar SRR 295 and rerolled deformed steel bars SDR 295 and SDR 345 (applicable on and after Jan 1, 1991) shall be manufactured by using the rolled steel for rerolling generated in the way to manufacture steel products arid by rerolling it Remark: The materials of (1) and the catalogue shape The and other sample (2) shall be selected of the steelmaking suitable shall be taken methods, material shall be confirmed spark The test, hardness lot divided the same kind by test from and according generating divided this lot and them by lot the kind to or their of by carrying out either one of and selection material plant test rolling as above-mentioned shall be made — o/ G 3117-1987 † Tests 7.1 / Mechanical , Test Matters in commor to mechanical General Matters of Mechanical Test 1.1.1 | tests shall be In accordance with the requirements specified in of JIS G 0303 However, the method of sampling specimens and the number of test pieces shall to the following: conform the (a) One specimen shall be sampled for every 10 t or fraction Speciman of the steel bars rolled in the same size using the same kind of material (bo) Number of test pieces piece shall be sampled 7.1.2 bend Tensile test piece Test shall One tensile test plece from one specimen Piece and Bend to the conform (1) nominal bend 7.1.3 test one bend test tensile test piece and The However, specifications free from machining.; The bend Methods shall diameter be steel bar shall be determined (side, test piece of Tensile in distance shall and accordance between be No Bend with the flats) test piece Tests Methods Standards according to specified given in JIS of tensile below test Z 2204 and However, the sectional area for obtaining the yielding point or proof stress and the tensile strength of rerolled deformed steel bar, the nominal sectional areas given in Table shall be used ¢ the The test piece shall be No specified in JIS Z 2201 (this shall correspondingly apply to the case of rerolled deformed steel bar) and the gauge length and the length of parallel portion of rerolled deformed (2) following and test piece shall be as manufactured Piece Test and JIS Z 2241 JIS Z 2248 as 7.2 Measurement of Shape, Size and Mass The sampling method and the method of measuring shape, size and mass of rerolled deformed steel bar shall be as mentioned below However, the rerolled plain steel bar shall conform to the requirements specified in JIS G 3191 (1) The method measuring the shape and size of knots and the sampling method of specimen of rerolled deformed steel bar shall be as follows: (a) One specimen of 0.5 m and over in length shall be sampled from every t or fraction of the bars of the same shape and size (b) The angle of the knot and the axis of rerolled deformed (c) The average spacing of knots shall be obtained by calculation of one-tenth either of the value obtained by measuring ten spacings bar shall be measured deformed steel bar between the consecutive of the value obtained other by the knots surface on development(*) the central line of knots, by measuring the equivalent line in the axial direction steel} of rerolled or length on an G 3117-1987 (d) The height of one knot (e) The gap of knots shall be obtained by measuring the distance between the end lines of opposing knots using callipers or the like on the actual object at right angles with the end lines or on the development(") of the surface of rerolled deformed steel bar However, when the spacings are not uniform, the mean value shall height measured be obtained Note ( 2) (*) shall be obtained at the three by measuring by averaging quadrisectional consecutive points values of of that knot ten knots The development shall be obtained, for example, rerolled deformed steel bar on oil clay by rolling The methods of sampling specimens and calculating mass tolerances in the actual mass measurement of rerolled deformed steel bars shall be as follows: (a) The method of sampling specimens for measuring the mass of a single piece of rerolled deformed steel bar shall be as specified in (1) (a) Further, calculation of mass tolerances in this case shall be carried out by dividing the difference between the calculated mass obtained by multiplying unit mass specified in Table by the length and the actually measured mass by weighing by the calculated mass The value obtained shall be expressed by percentage (b) The one specimens set in having measuring the the same mass shape of one and set size shall Further, be sampled as calculation of mass tolerances in this case shall be carried out by dividing the difference between the calculated mass obtained by multiplying the unit mass specified in Table by the length and the number of pieces and the measured mass by weighing by the calculated mass The value obtained shall be expressed by percentage Inspection , Inspection (1) (2) (3) shall be performed as follows: The mechanical properties, shape, form to the requirements specified Steel bars not accepted acceptance in accordance in tensile size, mass and appearance in 3., and test and bend test may con- be retested with the specification of 4.4 of JIS When the mass of one piece of rerolled deformed shall G 0303 steel bar by sampling has not complied with the specifications of 4.2 (8), new pieces of specimens shall be sampled for remeasurement When both pieces meet the requirements, the lot shall be accepted for 9, G 3117-1987 8-9 9.1 ; , Marking Marking of Individual Bar (1) (2) For rerolled plain steel bars, the marking of identificatjon of given in Table 11-2 classification For rerolled shall be carried 11-1 or Table deformed out steel bars, by the 11-1 or Table Further, carried Table out by 11-1 deformed steel bars the marking of manufacturer's the method of roll marks Symbol of classification ĩ plain steel bar Rerolled deformed steel bar of D 10 and D of given in 13in shall be of Classification ; Division Rerolled of roll marks name or mark Methods of Marking Identification (applicable till the end of 1990) T paintings of identification 11-2 for the rerolled designation, marking colour classification shall be carried out by the method Table © respective sen 24 Marking of identification of classification Marking marks No by roll | Marking by ‘painting ‡ application Bes gone see White (one section) SRR 30 SDR 24 One piece shortness SDR 30 Two pieces of knot shortness ( ) SDR 35 colour side of knot (-) Three pieces of knot shortness ( -) sas No application 10 G 3117-1987 Table 11-2 Methods of Marking Identi fication of Classification (applicable on and after Jan 1, 1991) Division Symbol Marking of identification of of classification classification Marking by roll Marking marks Rerolled bar ee Rerolled steel 9.2 bar plai plain teel stee deformed Marking for Indi vidual following information:—— 10 (1) Symbol (2) Diameter (3) Manufacturer's colour painting SRR 235 SRR 295 SDR 235 One piece shortness SDR 295 Two pieces of knot shortness ( ) SDR 345 Three pieces of knot shortness Bundie dle Pun No Red (one side section) ———————— - BS White (one side section) application of knot (-) No The steel bars shall be marked or designation or identifying mark Report The report shall be made + gs application ( -) of classification name by in accordance with of JIS G 0303 with the G 3117-1987 Edition Japanese Established by Minister Date of Establishment: Date of Revision: Date of Public Investigated Text of International and Industry 1969-09-01 in Official Japanese Gazette: Industrial Divisional Council on Technical Committee General Purpose This Trade 1987-03-01 Notice by: 1987-03-04 Standards Iron and 1SA, 1987 Steel on Steel Products English translation is published Japanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan © Committee for by: Printed in Takyo by Hohbunsha Co.,Ltd,