ASTM A479/A479M-06A
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ASTM A479/A479M-06a is a standard specification that covers hot- and cold-finished stainless steel bars, including forged and annealed types, intended for use in pressure vessels and high-temperature structural components. This specification is widely applied across petrochemical, food processing, marine, and pharmaceutical industries.
A New designations established in accordance with Practice E 527 and SAE J 1086 published jointly by ASTM and SAE. See ASTM DS–56C, available from ASTM.
ASTM A479 chemical composition
ASTM A479 304 stainless steel contains approximately 18–20% chromium, 8–11% nickel, ≤0.08% carbon, along with small amounts of manganese, silicon, phosphorus, and sulfur, providing excellent corrosion resistance and formability.
ASTM A479 bar mechanical properties
ASTM A479 316 stainless steel typically offers a minimum yield strength of 205 MPa, tensile strength of at least 515 MPa, elongation of 30% or more, and a maximum hardness of 217 HBW, making it ideal for high-corrosion and moderate-strength applications.
ASTM A479 Pressure vessel stainless steel bar
Round Bars
Square and Hex Bars
Forged Bars
Flat Bars and Custom Profiles
Finishes: Annealed, pickled, bright drawn, centerless ground
Size Range: 6mm to 300mm diameter (or equivalent inches)
Condition: Solution Annealed (A), Cold Worked (CW)
Applications of ASTM A479/A479M-06a Stainless Steel Bars
Pressure vessels and boilers
Heat exchangers and condensers
Flange and valve components
Marine and offshore structures
Chemical and pharmaceutical processing lines
What is the difference between ASTM A479 and A276?
A479 is for bars used in pressure vessels and high-temperature applications, while A276 is for general-purpose structural use and does not include high-temperature or pressure vessel requirements.
Is ASTM A479 suitable for welding?
Yes. Especially in low-carbon grades (e.g., 304L, 316L), A479 materials are suitable for welding applications due to minimal risk of intergranular corrosion.
What stainless grades are included in ASTM A479?
Grades include 304, 304L, 316, 316L, 321, 347, 904L, and duplex stainless steels like UNS S31803 and S32205.
