ASTM A 955/A955M : 2017 : REV A
Superseded
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Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
Hardcopy , PDF
15-09-2017
English
01-09-2017
| Committee |
A 01
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| DocumentType |
Standard
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| Pages |
14
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| PublisherName |
American Society for Testing and Materials
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| Status |
Superseded
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| SupersededBy | |
| Supersedes |
1.1This specification covers deformed and plain stainless-steel bars for concrete reinforcement in cut lengths and coils used in applications requiring resistance to corrosion or controlled magnetic permeability. The standard sizes and dimensions of deformed bars and their numerical designation shall be those listed in Table 1. The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
TABLE 1 Deformed Bar Designation Numbers, Nominal Weights [Masses], Nominal Dimensions, and Deformation Requirements
| Bar | Nominal Weight, lb/ft [Nominal Mass, kg/m]A | Nominal DimensionsB | Deformation Requirements, in. [mm] | ||||||||
| 400 Series; Duplex Alloys | 300 Series | Diameter, in. [mm] | Cross-Sectional Area, in.2 [mm2] | Perimeter, in. [mm] | Maximum Average Spacing | Minimum Average Height | Maximum Gap per SideC | ||||
| Two-Sided | Three-Sided | ||||||||||
| 3 [10] | 0.374 [0.556] | 0.378 [0.562] | 0.375 [9.5] | 0.11 [71] | 1.178 [29.9] | 0.262 [6.7] | 0.015 [0.38] | 0.143 [3.6] | 0.097 [2.5] | ||
| 4 [13] | 0.679 [1.011] | 0.686 [1.021] | 0.500 [12.7] | 0.20 [129] | 1.571 [39.9] | 0.350 [8.9] | 0.020 [0.51] | 0.191 [4.9] | 0.129 [3.3] | ||
| 5 [16] | 1.048 [1.559] | 1.058 [1.575] | 0.625 [15.9] | 0.31 [199] | 1.963 [49.9] | 0.437 [11.1] | 0.028 [0.71] | 0.239 [6.1] | 0.162 [4.1] | ||
| 6 [19] | 1.495 [2.225] | 1.511 [2.248] | 0.750 [19.1] | 0.44 [284] | 2.356 [59.8] | 0.525 [13.3] | 0.038 [0.97] | 0.286 [7.3] | 0.194 [4.9] | ||
| 7 [22] | 2.038 [3.032] | 2.059 [3.064] | 0.875 [22.2] | 0.60 [367] | 2.749 [69.8] | 0.612 [15.5] | 0.044 [1.12] | 0.334 [8.5] | 0.226 [5.8] | ||
| 8 [25] | 2.685 [3.995] | 2.713 [4.037] | 1.000 [25.4] | 0.79 [510] | 3.142 [79.8] | 0.700 [17.8] | 0.050 [1.27] | 0.383 [9.7] | 0.259 [6.6] | ||
| 9 [29] | 3.396 [5.053] | 3.441 [5.106] | 1.128 [28.7] | 1.00 [645] | 3.544 [90.0] | 0.790 [20.1] | 0.056 [1.42] | 0.431 [10.9] | 0.292 [7.4] | ||
| 10 [32] | 4.312 [6.416] | 4.358 [6.484] | 1.270 [32.3] | 1.27 [819] | 3.990 [101.3] | 0.889 [22.6] | 0.064 [1.63] | 0.487 [12.4] | 0.329 [8.3] | ||
| 11 [36] | 5.296 [7.880] | 5.352 [7.964] | 1.410 [35.8] | 1.56 [1006] | 4.430 [112.5] | 0.987 [25.1] | 0.071 [1.80] | 0.540 [13.7] | 0.365 [9.3] | ||
| 14 [43] | 7.64 [11.37] | 7.72 [11.49] | 1.693 [43.0] | 2.25 [1452] | 5.32 [135.1] | 1.185 [30.1] | 0.085 [2.16] | 0.648 [16.5] | 0.438 [11.1] | ||
| 18 [57] | 13.59 [20.22] | 13.72 [20.43] | 2.257 [57.3] | 4.00 [2581] | 7.09 [180.1] | 1.58 [40.1] | 0.102 [2.59] | 0.864 [21.9] | 0.584 [14.8] | ||
1.1.1Supplementary requirement (S1) of an optional nature is provided. It shall apply only when specified by the purchaser. In order to obtain a controlled magnetic permeability product, steel conforming to Supplementary Requirement S1 should be ordered.
1.2The chemical composition of the stainless steel alloy shall be selected for suitability to the application involved by agreement between the manufacturer and the purchaser. This is an important consideration in achieving the desired corrosion resistance or controlled magnetic permeability, or both, because these properties are not provided by all stainless steels.
Note 1:The alloys shown in Table 2 have found the most use in North America. Other alloys may also provide desired properties; consult with the manufacturer for stainless steel alloy properties and availability.
TABLE 2 Chemical Requirements of Typical AlloysA
| UNS | Composition % | |||||||||
| Type | Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Molybdenum | Nitrogen | |
| S24000 | XM-29 | 0.08 | 11.50- | 0.060 | 0.030 | 1.00 | 17.00- | 2.25- | .... | 0.20- |
| S24100 | XM-28 | 0.15 | 11.00- | 0.060 | 0.030 | 1.00 | 16.50- | 0.50- | .... | 0.20- |
| S30400 | 304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.00- | 8.00- | .... | 0.10 |
| S31603 | 316L | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 16.00- | 10.00- | 2.00-3.00 | 0.10 |
| S31653 | 316LN | 0.03 max | 2.00 | 0.045 | 0.030 | 1.00 | 16.00- | 10.00- | 2.00-3.00 | 0.10- |
| S31803 | .... | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 21.00- | 4.50- | 2.50-3.50 | 0.08- |
1.3Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.
1.4Bars are of two minimum yield strength levels, namely, 60 000 [420 MPa] and 75 000 psi [520 MPa], designated as Grade 60 [420] and Grade 75 [520], respectively.
1.5Plain bars in sizes up to and including 2 in. [50.8 mm] in diameter in coils or cut lengths, when ordered, shall be furnished under this specification in Grade 60 [420] and Grade 75 [520], respectively. Bending properties, when required, shall be by agreement between the manufacturer and purchaser. Requirements providing for deformations and marking shall not be applicable to plain bars.
1.6When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service.
Note 2:Welding of stainless steel reinforcement would occur after shipment from the producer. Structural welding should be performed in accordance with the latest edition of AWS D1.6/D1.6M, any other internationally accepted stainless steel welding code, or a procedure suggested by the material producer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification and inspection requirements.
1.7This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification A955M).
1.8The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.9This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this specification to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.
1.10This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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