ASTM/ASME SA 276 and SA 479 are both specifications that cover stainless steel bars. However, there are some differences between the two:
Scope:
ASTM/ASME SA 276: This specification covers stainless steel bars, including hot-finished or cold-finished bars, rounds, squares, hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels.
ASTM/ASME SA 479: This specification covers stainless steel bars and shapes for use in boilers and other pressure vessels.
Chemical Composition and Mechanical Properties:
Both specifications outline specific requirements for the chemical composition, mechanical properties, and other characteristics of stainless steel bars. However, the exact requirements may vary depending on the grade of stainless steel being specified.
Applications:
ASTM/ASME SA 276: Stainless steel bars specified under SA 276 are commonly used in a wide range of industrial applications, including construction, manufacturing, and general engineering.
ASTM/ASME SA 479: Stainless steel bars specified under SA 479 are specifically intended for use in boilers and pressure vessels, where high corrosion resistance and mechanical strength are required.
Certification:
Both specifications require products to be supplied with material test reports certifying compliance with the specified requirements. These reports typically include details of the chemical composition, mechanical properties, and any additional testing performed on the material.
In summary, while both ASTM/ASME SA 276 and SA 479 cover stainless steel bars, SA 276 is more general and covers a wider range of applications, while SA 479 is specifically focused on bars and shapes for use in boilers and pressure vessels.
