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About This Item

 

Full Description

This specification covers the stainless steel-clad concrete reinforcement bars in cut lengths or coils, deformed and plain round. The standard sizes and dimensions of deformed bars and their number designations shall be those listed in Table 1 [Table 2].

Note 1—For coils of deformed bars, the capacity of industrial equipment limits the maximum bar size that can be straightened.

Bars are of three minimum yield levels: namely, 300 MPa [40,000 psi], 420 MPa [60,000 psi], and 520 MPa [75,000 psi], designated as Grade 300 [40], Grade 420 [60], and Grade 520 [75], respectively.

Hot-rolled plain rounds, in sizes up to and including 50.8 mm [2 in.] in diameter in coils or cut lengths, when specified for dowels, spirals, and structural ties or supports, shall be furnished under this specification in Grade 300 [40], Grade 420 [60], and Grade 520 [75] (see Note 2).

For ductility properties (elongation and bending), test provisions of the nearest nominal diameter deformed bar size shall apply. Those requirements providing for deformations and marking shall not be applicable.

Note 2—The weight for plain rounds smaller than 9.5 mm [3/8 in.] in diameter shall be computed on the basis of the size in ASTM A510/A510M.

Welding of the material in this specification should not be attempted since no experience has been demonstrated regarding weldability of this product. Mechanical coupling should be specified for bars requiring continuous longitudinal connection. Mechanical couplings must conform to ASTM A276/A276M, UNS S31803.

This specification is applicable for orders in either SI units (M 329M) or in inch-pound units (M 329). SI units and inch-pound units are not necessarily equivalent. Inch-pound units are shown in brackets in the text for clarity, but they are the applicable values when the material is ordered to M 329.

This standard was formerly designated as provisional standard MP 13M/MP 13.

 

Document History

  1. AASHTO M 329M/M 329-11 (2023)

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

    • Most Recent
  2. AASHTO MP 13M/MP 13-04 (2006)


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

    • Historical Version