1、August 2009 Translation by DIN-Sprachendienst.English price group 8No 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!$*“1560798www.din.deDDIN 488-2Reinforcing steels Reinforcing steel barsEnglish translation of DIN 488-2:2009-08Betonstahl BetonstabstahlEnglische bersetzung von DIN 488-2:2009-08Aciers pour bton arm Aciers en barres droitesTraduction anglaise de DIN 488-2:2009-08upersedesDIN 488-2:1986-06w
3、ww.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.110 .10S7 DIN 488-2:2009-08 A comma is used as the decimal marker. Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 4 4 Symbols . 4 5 Designatio
4、n and ordering 5 5.1 Standard designation . 5 5.2 Ordering. 5 6 Steel grade classification and product forms 5 7 Requirements 5 7.1 Manufacturing processes 5 7.2 Nominal diameters, nominal cross-sectional areas and nominal masses . 5 7.3 Properties 6 7.3.1 Properties determined in the tensile test .
5、 6 7.3.2 Properties determined in the fatigue test. 6 7.3.3 Bend performance 6 7.3.4 Deviation from the nominal cross-sectional area . 7 7.3.5 Weldability. 7 7.3.6 Surface geometry 7 8 Identification of the products 11 9 Proof of conformity. 11 2 DIN 488-2:2009-08 Foreword DIN 488-2:2009-08 has been
6、 prepared by Working Committee NA 021-00-03 AA Normung von Betonstahl und Spannstahl of the Normenausschuss Eisen und Stahl (FES) (Iron and Steel Standards Committee). Amendments The following amendments have been made to DIN 488-2:1986-06: a) Steel grades BSt 420 S (1.0428) and BSt 500 S (1.0438) h
7、ave been deleted. b) Steel grade B500B (1.0439) has been included with more stringent ductility requirements. c) Nominal diameters 32,0 mm and 40,0 mm have been included. d) The figures have been revised. e) The standard has been editorially revised. Previous editions DIN 488-2: 1972-04, 1986-06 3 D
8、IN 488-2:2009-08 1 Scope This standard applies to ribbed reinforcing steel bars of steel grade B500B (1.0439) according to DIN 488-1 with the nominal diameters given in Table 2, used for the reinforcement of concrete. 2 Normative references The following referenced documents are indispensable for th
9、e 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 488-1:2009-08, Reinforcing steel Grades, properties, marking DIN 488-6:2009-08, Reinforcing steel Part 6
10、: Assessment of conformity DIN EN ISO 15630-1, Steel for the reinforcement and prestressing of concrete Test methods Part 1: Reinforcing bars, wire rod and wire 3 Terms and definitions For the purposes of this standard, the terms and definitions in DIN 488-1 and DIN 488-6 apply. 4 Symbols See Table
11、1. Table 1 Symbols Symbol Unit Description d mm Nominal bar diameter Anmm2Nominal cross-sectional area D mm Mandrel diameter oTransverse rib flank inclination o Angle of inclination of transverse rib e mm Gap between rows of ribs hlmm Longitudinal rib height fR Relative rib area ammm Rib height at t
12、he mid-point of the transverse rib a1/4mm Rib height at the -length point a3/4mm Rib height at the -length point b mm Width of transverse rib c mm Rib spacing 4 DIN 488-2:2009-08 5 Designation and ordering 5.1 Standard designation The provisions of DIN 488-1 are applicable for the standard designati
13、on of reinforcing steel bar. 5.2 Ordering At the time of order, the desired quantity and bar length shall be given in addition to the standard designation. Example of an order for 50 t of reinforcing steel bar conforming to this standard of steel grade B500B (1.0439), of 20,0 mm nominal diameter, an
14、d bar length 12 m: 50 t Reinforcing steel bar DIN 488 B500B 20,0 12 or 50 t Reinforcing steel bar DIN 488 1.0439 20,0 12 6 Steel grade classification and product forms This standard covers steel grade B500B (1.0439) in the form of ribbed steel bars. 7 Requirements 7.1 Manufacturing processes See DIN
15、 488-1:2009-08, 7.1.1 and 7.1.4. 7.2 Nominal diameters, nominal cross-sectional areas and nominal masses 7.2.1 Table 2 lists the deliverable nominal diameters and the nominal cross-sectional areas and nominal masses calculated from these diameters. 7.2.2 The core cross-section of ribbed reinforced s
16、teel bars shall be as circular as possible. 5 DIN 488-2:2009-08 Table 2 Nominal diameters, nominal cross-sectional areas and nominal masses Nominal diameter mm Nominal cross-sectional areaamm2Nominal massbkg/m 6,0 28,3 0,222 8,0 50,3 0,395 10,0 78,5 0,617 12,0 113 0,888 14,0 154 1,21 16,0 201 1,58 2
17、0,0 314 2,47 25,0 491 3,85 28,0 616 4,83 32,0 804 6,31 40,0 1 257 9,86 aThe nominal cross-sectional area is calculated as follows: 42ndA=. bCalculated with a density of 7,85 kg/dm3. 7.3 Properties 7.3.1 Properties determined in the tensile test See DIN 488-1:2009-08, Table 2, column 3. 7.3.2 Propert
18、ies determined in the fatigue test See DIN 488-1:2009-08, Table 2, column 3. 7.3.3 Bend performance To demonstrate the bend performance, the rebend test shall be carried out according to DIN EN ISO 15630-1 for diameters up to d = 32 mm. Bend the test pieces through an angle of at least 90 around a m
19、andrel with a diameter as specified in Table 3, age the test pieces (see DIN 488-6:2009-08, Table 21) and rebend them after cooling in still air to room temperature of at least 20 C. For diameters d = 40 mm, carry out a bend test with a mandrel diameter D = 6 d and a minimum angle of 90 according to
20、 DIN EN ISO 15630-1. After the test, the test piece shall show no sign of fracture or cracks visible to a person with normal or corrected vision. Table 3 Mandrel diameters for rebend test Nominal diameter d mm Mandrel diameter D 16 16 28 28 32 5 d 8 d 10 d 6 DIN 488-2:2009-08 7.3.4 Deviation from th
21、e nominal cross-sectional area See DIN 488-1:2009-08, Table 2, column 3. 7.3.5 Weldability See DIN 488-1:2009-08, Table 2, row 14. 7.3.6 Surface geometry 7.3.6.1 General Reinforcing steel bar of steel grade B500B shall have either two or four rows of transverse ribs. The reinforcing steel bar can be
22、 manufactured with or without longitudinal ribs (see Figures 1 a), 1 b) and Figure 2). aFor cross-section A-A, see Figure 3 a) Figure 1 a) Example of B500B reinforcing steel bar with two rows of transverse ribs (no longitudinal ribs) 7 DIN 488-2:2009-08 NOTE For relevant data not given here, see Fig
23、ure 1 a). Figure 1 b) Example of B500B reinforcing steel bar with two rows of transverse ribs (with longitudinal ribs) 8 DIN 488-2:2009-08 Figure 2 Example of B500B reinforcing steel bar with four rows of transverse ribs (no longitudinal ribs) 9 DIN 488-2:2009-08 A-AaaSee Figure 1 a). Figure 3 a) Tr
24、ansverse rib Cross-section at mid-rib Figure 3 b) Transverse rib Longitudinal section at mid-rib 7.3.6.2 Transverse ribs 7.3.6.2.1 The transverse ribs shall be crescent-shaped in their longitudinal section and shall not merge into any longitudinal ribs present (see Figure 3 b). 7.3.6.2.2 Transverse
25、rib flanks shall be inclined at more than 40 (flank inclination ) and the transition from the rib to the core shall be radiused (see Figure 3 a). 7.3.6.2.3 The transvese rib flank inclination to the bar axis () shall be 40 to 70. For rib rows with alternating inclination angles, these may be 35 to 7
26、5. 7.3.6.2.4 The dimensions and spacing of the transverse ribs shall be as shown in Table 4. 7.3.6.2.5 The sum of the spacing of the rib rows e shall not exceed 25 % of the circumference. 7.3.6.3 Longitudinal ribs In the case of hot-rolled reinforcing steel bar, the height hl (by analogy with amin F
27、igure 3 a) of any longitudinal ribs present shall not exceed a value of 0,15 d. 7.3.6.4 Relative rib area The required values for the relative rib area fRare given in Table 4, column 6. For the basic population, the 5 % quantiles specified in DIN 488-1:2009-08, Table 2, shall be maintained. 10 DIN 4
28、88-2:2009-08 11 Table 4 Dimensions and spacing of transverse ribs and relative rib area (for further dimensions, see 7.3.6.2 and 7.3.6.4) Height (guideline values) Nominal diameter d at mid-point amat the quarter points a1/4a3/4Widtha(guideline values) b Rib spacingb(guideline values)c mm mm mm mm m
29、m Relative rib areac fR6,0 0,39 0,28 0,6 5,0 0,039 8,0 0,52 0,36 0,8 5,7 0,045 10,0 0,65 0,45 1,0 6,5 0,052 12,0 0,78 0,54 1,2 7,2 0,056 14,0 0,91 0,63 1,4 8,4 0,056 16,0 1,04 0,72 1,6 9,6 0,056 20,0 1,30 0,90 2,0 12,0 0,056 25,0 1,63 1,13 2,5 15,0 0,056 28,0 1,82 1,26 2,8 16,8 0,056 32,0 2,08 1,44
30、3,2 19,2 0,056 40,0 2,60 1,80 4,0 24,0 0,056 aWidths up to 0,2 d are permissible at the rib mid-point (measured perpendicular to the transverse rib). bPermissible deviation: 15 %. c5 % quantile. 8 Identification of the products The products shall be identified as specified in DIN 488-1:2009-08, clause 8. 9 Proof of conformity Proof of conformity to the requirements of this standard shall be provided as specified in DIN 488-6.
