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ASTM A479 Standards And Specifications

ASTM A479 Specification refers to Stainless Steel Round Bar and Duplex Steel Round Bar for use in Boilers and Other Pressure Vessels.

ASTM A479 Round Bar

Astm A479 Round Bar

ASTM A479 Round Bar has one important thing going for them: they are made from stainless steel. Stainless steel is corrosion resistant and the stainless steel which has higher alloy content are able to withstand the onslaught of acids, "chlorine bearing environments" as well as solutions containing alkaline. Because of this resistance, some of the applications and uses of stainless steel bars are in machining, fasteners, grills and construction. The 304, 304L, and 304H may be considered to perform uniformly in most corrosive environments. Plain round bar is commonly used to separate mesh in concrete slabs and is used in a range of commercial and infrastructure applications.

Stainless Steel Round Bar

Stainless Steel Round Bar is a nickel-chromium alloy bar that contains supplemental amounts of columbium, iron, molybdenum, aluminum, and titanium. Stainless Steel Round Bar have high strength properties, heat treatable, good corrosion resistance, formability and weldability. Stainless Steel Round Bar is commonly used for valves, fasteners, tubing materials and mandrels. Stainless Steel Round Bar has excellent cryogenic and heat ranges. Common uses of Stainless Steel include deployment in gas turbines, subservice safety valves, aircraft engines, thrust reversers, and industrial fasteners.

Duplex Steel Round Bar

Duplex Steel Round Bar is a nickel-chromium alloy bar that contains supplemental amounts of columbium, iron, molybdenum, aluminum, and titanium. Duplex Steel Round Bar have high strength properties, heat treatable, good corrosion resistance, formability and weldability. Duplex Steel Round Bar is commonly used for valves, fasteners, tubing materials and mandrels. Duplex Steel Round Bar has excellent cryogenic and heat ranges. Common uses of Duplex Steel include deployment in gas turbines, subservice safety valves, aircraft engines, thrust reversers, and industrial fasteners.

Scope And Manufacturing

ASTM A479 specification covers hot and cold-finished Stainless Steel Bar, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels for use in boiler and pressure vessel construction. Four grades of the stainless steel are available which includes austenitic, austenitic-ferritic, ferritic, and martensitic grades. Mechanical properties such as tensile strength, yield strength, elongation, and hardness shall be determined for the specimens subjected to normalized, tempered, annealed, and quenched conditions. The austenitic stainless steels shall be subjected to heat treatment and shall undergo corrosion test. The round bars rolling process takes place with placing the stainless steel in a analyzed continuous shape rolling mill which is released in the first eight rolling stands. Feed stock before the rolling process is controlled (dimensions, surface, number of melting) and then it is heated in a walking beam furnace according to the technology of heating the steel grade. When heated to the appropriate temperature, it is subjected to descaling operations generated by the heating process. The next stages are technological operations of rolling in individual stands. After the hot rolling process, the product obtained is cooled down to ambient temperature.


ASTM A479 specification covers stainless steel bars. It also includes hot-rolled or extruded shapes such as angles, tees, and channels. They have an extensive use in boiler and pressure vessel construction.
Other Names : SS Bar, SS Round Bar, ASTM A479 Bar, Stainless Steel Round Bar, Stainless Steel Bar.
Material : Stainless Steel, Duplex Steel, Super Duplex, SMO 254.
Brand : Siddhagiri Metals and Tubes
Manufacturer : Siddhagiri Metals and Tubes
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