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Full Description

1.1 This 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.

(A) The 400 and Duplex-Alloy Series is based on a density of 489.59 lb/ft³ [7833.4 kg/m3 ]. The 300 Series is based on a density of 494.78 lb/ft³ [7916.5 kg/m³]. Density varies with alloy content which may result in a variation of several percent.
(B) The nominal dimensions of a deformed bar are equivalent to those of a round bar having the same weight [mass] per foot [metre] as the deformed bar.
(C) The maximum gap (measured as a chord) between the ends of the deformations shall not exceed 25 %/n of the nominal perimeter of the bar, where n is the number of longitudinal gaps or longitudinal ribs around the perimeter of the bar.

1.1.1 Supplementary 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.

1.2 The 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.

(A) Maximum, unless otherwise indicated.

1.3 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.

1.4 Bars 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.

1.5 Plain 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.

1.6 Weldability of most stainless steel compositions is generally good, however, pre-weld or post-weld procedures, or both, are necessary. Where material is to be welded, a welding procedure suitable for the chemical composition and intended use or service shall be used. Retesting of physical properties should be considered following welding procedures depending upon the steel composition and welding operation involved.

Note 2: It is recommended that the user consult the manufacturer for information available from the Nickel Development Institute (NIDI) (Toronto, Canada).

1.7 This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification A955M).

1.8 The 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.

1.9 This standard 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 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 

Document History

  1. ASTM A955/A955M-20c


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Most Recent
  2. ASTM A955/A955M-20b


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  3. ASTM A955/A955M-20a


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  4. ASTM A955/A955M-20


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  5. ASTM A955/A955M-19


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  6. ASTM A955/A955M-18b


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  7. ASTM A955/A955M-18a


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  8. ASTM A955/A955M-18


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  9. ASTM A955/A955M-17a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  10. ASTM A955/A955M-17


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  11. ASTM A955/A955M-16a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  12. ASTM A955/A955M-16


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  13. ASTM A955/A955M-15

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    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  14. ASTM A955/A955M-14


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  15. ASTM A955/A955M-12e1


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  16. ASTM A955/A955M-12


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  17. ASTM A955/A955M-11e1


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  18. ASTM A955/A955M-11


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  19. ASTM A955/A955M-10a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  20. ASTM A955/A955M-10


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  21. ASTM A955/A955M-09b


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  22. ASTM A955/A955M-09a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  23. ASTM A955/A955M-09


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  24. ASTM A955/A955M-07a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  25. ASTM A955/A955M-07


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  26. ASTM A955/A955M-06a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  27. ASTM A955/A955M-06


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  28. ASTM A955/A955M-05a


    Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

    • Historical Version
  29. ASTM A955/A955M-05


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  30. ASTM A955/A955M-04ae1


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  31. ASTM A955/A955M-04a


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  32. ASTM A955/A955M-04


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  33. ASTM A955/A955M-03b


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  34. ASTM A955/A955M-03a


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  35. ASTM A955/A955M-03


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  36. ASTM A955/A955M-02


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version
  37. ASTM A955/A955M-01


    Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement

    • Historical Version