1、August 2009 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、 77.140.15!$*“1560790www.din.deDDIN 488-1Reinforcing steels Part 1: Grades, properties, markingEnglish translation of DIN 488-1:2009-08Betonstahl Teil 1: Stahlsorten, Eigenschaften, KennzeichnungEnglische bersetzung von DIN 488-1:2009-08Aciers pour bton arm Partie 1: Nuances, proprits, marquageTradu
3、ction anglaise de DIN 488-1:2009-08upersedesDIN 488-1:1984-09www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.180 .10S7 DIN 488-1:2009-08 A comma is used as the decimal marker. Contents Page Foreword. 3 Introduction 4 1 Scope . 5 2
4、Normative references . 5 3 Terms and definitions 6 4 Symbols . 7 5 Designation . 7 5.1 Standard designation . 7 5.2 Examples of standard designation . 8 6 Steel grade classification and product forms/delivery forms 8 7 Requirements 8 7.1 Manufacturing processes 8 7.2 Nominal diameters, nominal cross
5、-sectional areas and nominal masses . 10 7.3 Properties 11 8 Identification of the products 12 8.1 Identification of the steel grades. 12 8.2 Identification of the manufacturer. 14 8.2.1 General. 14 8.2.2 Reinforcing steel bars 14 8.2.3 Reinforcing steel coils . 15 8.2.4 Welded fabrics 16 8.2.5 Latt
6、ice girders . 16 8.2.6 Reinforcing wire 17 8.3 Identification of the processor 17 Annex A (informative) Comparison of the symbols used in DIN 488-1 and DIN 1045-1 . 18 2 DIN 488-1:2009-08 Foreword DIN 488-1:2009-08 has been prepared by Working Committee NA 021-00-03 AA Normung von Betonstahl und Spa
7、nnstahl of the Normenausschuss Eisen und Stahl (FES) (Iron and Steel Standards Committee). Amendments This standard differs from DIN 488-1:1984-09 as follows: a) Steel grades BSt 420 S (1.0428) and BSt 500 M (1.0466) have been deleted. b) Steel grade BSt 500 S (1.0438) has been renamed as B500A (1.0
8、438). c) Steel grade B500B (1.0439) has been included with more stringent ductility requirements. d) The elongation after fracture requirements A10have been replaced by percentage total elongation at maximum force Agt. e) The requirements relating to fatigue strength and deviation from the cross-sec
9、tional area have been amended. f) A maximum carbon equivalent value has been specified for proof of weldability, and data on suitable welding processes have been deleted. g) A maximum value has been included for the percentage by mass of copper. h) The nominal diameter range has been extended up to
10、40,0 mm for reinforcing steel bars and up to 14,0 mm for welded fabric. i) Marking of steel grades by different numbers of ribs is now included. j) Reinforcing steel coils and decoiled products have been included. k) Lattice girders have been included. l) Strength characteristics have been calculate
11、d with nominal cross-sectional area. m) The ratio Re,act/Re,nomhas been included. n) The standard has been editorially revised. Previous editions DIN 488: 1923-07, 1932-05, 1939-03 DIN 488-1: 1972-04, 1984-09 3 DIN 488-1:2009-08 Introduction The following developments have made it necessary to publi
12、sh a new edition of DIN 488-1: The German design standard on reinforced concrete construction (DIN 1045-1) requires a new definition of reinforcing steel properties, particularly of ductility; this also applies to the European Standard on reinforced concrete. It was decided that all the delivery for
13、ms of reinforcing steel should be included in one standard, where possible. Reinforcing steels are special steels with properties specifically intended to be used as reinforcement for concrete. Compared to previous practice, greater proof of ductility is now required to be provided for reinforcing s
14、teels. This is defined by the yield strength ratio and the percentage total elongation at maximum force, the latter replacing elongation after fracture, which has been used hitherto. All the previously used properties for reinforcing steels such as the following have been retained: yield strength; b
15、end performance; bond; fatigue strength; weldability; shear force of welded joints in welded fabrics. Two ductility classes have been formed on the basis of the ductility values: A: Rm/Re 1,05, Agt 2,5 %; B: Rm/Re 1,08, Agt 5,0 %. The yield strength required for design purposes is uniformly 500 MPa,
16、 the other properties are, to a certain extent, diameter-dependent. The standard covers two steel grades offered in many different delivery forms, i.e. as straight bars (reinforcing steel bars), reinforcing steel coil, mechanically straightened, straight or bent bars, stirrups, hooks or loops (decoi
17、led products), welded fabric, lattice girders and reinforcing steel with plain or indented surface (reinforcing wire). Reinforcing wire can also be used for lattice girders. Welded fabric and lattice girders can be assembled from different steel grades. In lattice girders, sheet metal profiles can a
18、lso be used as the upper chord. 4 DIN 488-1:2009-08 1 Scope This standard applies to weldable ribbed, indented and plain steel grades and product forms described in clause 6 and Table 2 for the reinforcement of concrete. NOTE Reinforcing steel can be produced as reinforcing steel bars and reinforcin
19、g steel coils. Reinforcing steel is either used directly (as reinforcing steel bars) or decoiled (as reinforcing steels mechanically processed into coils) or is subsequently processed into welded fabric and lattice girders. 2 Normative references The following referenced documents are indispensable
20、for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 488-2, Reinforcing steel Part 2: Reinforcing steel bars DIN 488-3, Reinforcing steel Part 3: Reinf
21、orcing steel in coils, reinforcing wire DIN 488-4, Reinforcing steel Part 4: Welded fabric DIN 488-5, Reinforcing steel Part 5: Lattice girders DIN 488-6:2009-08, Reinforcing steel Part 6: Assessment of conformity DIN 1045-1:2008-08, Concrete, reinforced and prestressed concrete structures Part 1: D
22、esign and construction DIN EN 10027-2, Designation systems for steels Part 2: Numerical system DIN EN ISO 15630-1, Steel for the reinforcement and prestressing of concrete Test methods Part 1: Reinforcing bars, wire rod and wire DIN EN ISO 15630-2, Steel for the reinforcement and prestressing of con
23、crete Test methods Part 2: Welded fabric DIN EN ISO 17660-1, Welding Welding of reinforcing steel Part 1: Load-bearing welded joints DIN EN ISO 17660-2, Welding Welding of reinforcing steel Part 2: Non-load-bearing welded joints 5 DIN 488-1:2009-08 3 Terms and definitions For the purposes of this st
24、andard, the following terms and definitions apply. 3.1 reinforcing steel steel product with a circular or practically circular cross-section which is suitable for the reinforcement of concrete 3.2 reinforcing steel bar ribbed reinforcing steel delivered in straight lengths 3.3 reinforcing steel coil
25、 ribbed reinforcing steel delivered in rings 3.4 decoiled product reinforcing steel manufactured in coils and subsequently straightened and delivered in different forms (straight or bent bars) 3.5 welded fabric arrangement of longitudinal and transverse bars of the same or different nominal diameter
26、 and length that are arranged substantially at right angles to each other and factory electrical spot resistance welded (projection welded) together by automatic machines at all points of intersection 3.6 lattice girder two- or three-dimensional reinforcing element consisting of an upper chord, one
27、or more lower chords and continuous or discontinuous diagonals which are resistance spot welded (projection welded) to the chords at all the contact points 3.7 reinforcing wire plain or indented reinforcing steel produced in the form of coils and further processed from the coil or factory straighten
28、ed into reinforcement 3.8 ratio Re,act/Re,nomratio of the yield strength determined in the tensile test (Re,act) to the nominal value of the yield strength (Re,nom= 500 MPa)3.9 manufacturer production area where reinforcing steel is manufactured in the form of bars and coils, welded fabrics, lattice
29、 girders and reinforcing wire 3.10 processing works (decoiling) works where the reinforcing steel coils are subsequently processed (straightened) into the decoiled product 6 DIN 488-1:2009-08 4 Symbols See Table 1. NOTE For a comparison with the symbols used in DIN 1045-1, see Annex A. Table 1 Symbo
30、ls Symbol Unit Description d mm Nominal diameter of the bar, rod or wire p % Quantile for a statistical probability W = 1 = 0,90 (one-sided) W Statistical probability ReMPaaYield strength ReHMPaaUpper yield strength Rp0,2MPaa0,2 % proof strength RmMPaaTensile strength Rm/Re Ratio of tensile strength
31、 to yield strength Re,act/Re,nomMPaaRatio of Re,act/Re,nom(see 3.8) Agt% Percentage total elongation at maximum force FsN Shear force of welded joint 2 aMPaaStress range Anmm2Nominal cross-sectional area An% Deviation from the nominal cross-sectional area fR Relative rib area k1 Stress exponent for
32、the range 106load cycles CeqPercentage by mass in % Carbon equivalent value (CEV) a1 MPa = 1 N/mm25 Designation 5.1 Standard designation The standard designation of products complying with the standards in the DIN 488 series shall be formed as follows in the sequence indicated: term (reinforcing ste
33、el bars, reinforcing steel coils, welded fabric, lattice girders, reinforcing wire); number of this DIN standard (DIN 488); name or material number of the reinforcing steel grade (see Table 2); nominal diameter of the reinforcing steel bars, reinforcing steel coils or reinforcing wire, or characteri
34、zing nominal dimensions of the welded fabrics and lattice girders. 7 DIN 488-1:2009-08 5.2 Examples of standard designation (see also DIN 488-2 to DIN 488-5): a) designation of ribbed reinforcing steel bar of steel grade B500B (1.0439) with a nominal diameter d = 20,0 mm: Reinforcing steel bar DIN 4
35、88 B500B 20,0 or Reinforcing steel bar DIN 488 1.0439 20,0; b) designation of plain (+G) reinforcing wire of steel grade B500A (1.0438) with a nominal diameter d = 6,0 mm: Reinforcing wire DIN 488 B500A+G 6,0 or Reinforcing wire DIN 488 1.0438+G 6,0; c) for an example of designation of reinforcing s
36、teel coils, see DIN 488-3; d) for examples of designation of welded fabrics, see DIN 488-4; e) for examples of designation of lattice girders, see DIN 488-5. 6 Steel grade classification and product forms/delivery forms 6.1 This standard covers steel grades B500A (1.0438 according to DIN EN 10027-2)
37、 and B500B (1.0439 according to DIN EN 10027-2). The difference between these two steel grades is in the ductility property specifications (see Table 2). 6.2 Steel grade B500A is supplied as ribbed reinforcing steel coils and as a decoiled product. The reinforcing wire with plain (+G) or indented (+
38、P) surface can be supplied in the form of both coils and bars. Steel grade B500B is delivered as ribbed reinforcing steel bars, as ribbed reinforcing steel coils and as a decoiled product. 6.3 Welded fabrics are produced from steel grade B500A and/or steel grade B500B. 6.4 Lattice girders are produc
39、ed from steel grades B500A and/or B500B and with or without steel strips (see DIN 488-5). 7 Requirements 7.1 Manufacturing processes 7.1.1 Reinforcing steels complying with this standard shall be produced as follows: hot rolled, without subsequent treatment; or hot rolled and heat treated with the r
40、olling heat; or hot rolled and cold stretched; or cold reduced (by drawing or cold rolling). 7.1.2 Reinforcing wire manufactured by cold reducing. 8 DIN 488-1:2009-08 7.1.3 The bars for welded fabrics and lattice girders are manufactured according to one of the processes described in 7.1.1 or 7.1.2.
41、 7.1.4 The manufacturing processes as in 7.1.1 to 7.1.3 shall remain at the discretion of the manufacturer as long as the proofs specified in DIN 488-6 have been provided. Table 2 Steel grade classification and properties of the reinforcing steels 1 2 3 4 5 6 1 Name B500A B500B B500A B500A 2 Materia
42、l number 1.0438 1.0439 1.0438 1.0438 3 Surface Ribbed Ribbed Plain (+G) Indented (+P) 4 Product form/ delivery form Reinforcing steel coils, decoiled products, welded fabrics, lattice girders Reinforcing steel bars, reinforcing steel coils, decoiled products, welded fabrics, lattice girders Reinforc
43、ing wire coils and bars, lattice girders Quantile p (%) for W = 1 (one-sided) 5 Yield strength ReaMPab 500 500 500 500 5,0 for W = 0,90 6 Ratio tensile strength/yield strength Rm/Re1,05c 1,08 1,05c1,05c10,0 for W = 0,90 7 Ratio Re,act/Re,nom 1,30 90,0 for W = 0,90 8 Percentage total elongation at ma
44、ximum force Agt% 2,5c 5,0 2,5c2,5c10,0 for W = 0,90 9 Stress range 2 ain MPabfor 1 106load cycles; stress exponents k1and k2of the S/N curve (upper stress of 0,6 Re,nom) 175dk1= 4d; k2= 9dd 28,0 mm: 175d k1= 4d; k2= 9d d 28 mm: 145 k1= 4; k2= 9 5,0 for W = 0,75 (one-sided) 10 Bend performance determ
45、ined in rebend test up to d = 32 mm (see DIN 488-2 and DIN 488-3), determined in bend test for d = 40 mm (see DIN 488-2), determined in bend test on weld (see DIN 488-4) Minimum value 11 Exceeding or falling short of the nominal cross-sectional area An% +6/4 +6/4 +6/4 +6/4 95,0/5,0 for W = 0,90 12 S
46、hear force of the welded joints in welded fabricse 0,3 An Ree, f 0,3 An Ree,f e e 5,0 for W = 0,90 13 Relative rib area fR 4,0 and 4,5:0,036 5,0 to 6,0:0,039 6,5 to 8,5:0,045 9,0 to 10,0:0,052 11,0 to 40,0:0,056 g 5,0 for W = 0,90 14 WeldabilityhCeqi 0,50 (0,52) for d 28 mm Ceqi 0,47 (0,49) for d 28
47、 mm C 0,22 (0,24) P 0,050 (0,055) S 0,050 (0,055) N 0,012 (0,014)jCu 0,60 (0,65)kTable 2 (continued) 9 DIN 488-1:2009-08 aThe yield strength (and tensile strength) is calculated from the force on attaining the yield strength (and maximum force) divided by the nominal cross-sectional area (An= d2/4).
48、 The upper yield strength ReHis taken as the yield strength. If there is no pronounced yield strength, the 0,2 % proof strength Rp0,2 shall be determined . b1 MPa = 1 N/mm2. cRm/Re 1,03 and Agt 2,0 for the nominal diameters 4,0 mm to 5,5 mm. d100 MPa and k1= 4lund k2= 5lfor welded fabrics. No requirements for lattice girders and for diameters 5,5 mm. Lattice girders according to
