Standards |
Stainless Steel
Reinforcing Bars (Rebar) There are currently two standards that deal with stainless steel rebar; BS 6744 (2001) and ASTM A955/A995M (2004). British Standard BS 6744:2001 "Stainless steel bars for the reinforcement and use in concrete - Requirements and test methods" came into effect on 15 September 2001. This standard supersedes BS 6744:1986, which is now withdrawn. The revision contains new grades and strength levels not in the 1986 standard. Informative annexes have been used to give guidance on grade selection, magnetic properties, coefficients of thermal expansion and third party certification. This British Standard specifies various alloys, listed below:
Sizes of bars in all grades range from 3 mm to 50 mm (nominal). Nominal cross sectional areas and mass per meter length are provided in this standard for the different alloy grades. Three strength levels are covered, Grades 200, 500 and 650, corresponding to minimum 0.2% Proof Strength levels of 200 MPa, 500 MPa and 650 MPa respectively (see standard for further details). ASTM A955/A995M: 2004 "Deformed and Plain Stainless Steel Bars for Concrete Reinforcement" This ASTM Standard, revised in 2004, covers rebars in a wide range of alloys, including 304 (UNS S30400), 316L (UNS S31603), 316 LN (UNS S31653), and UNS S31803. Further detailed specifications and heat treatment conditions for these alloys are described in the ASTM Standard A276. The designer or specifier thus has a broad spectrum of mechanical properties and corrosion resistance from which to select a suitable rebar material.
* Other mechanical properties can be requested from suppliers Magnetic permeability testing is covered in the Supplementary Requirements section. Link to British Standards Institution: Link to American Society for Testing and Materials (ASTM):
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