For global projects, understanding how ASTM A515 Gr.65 steel plate is classified under different international standards is essential for procurement, design, and compliance. The two most significant specifications are ASME SA-515 (American) and ISO 9328-2 (International). While technically similar, key differences in their requirements impact material certification and acceptance.
Both standards cover carbon steel plates for pressure vessels at elevated temperatures. The material grade A515 Gr.65 under ASTM has a closely corresponding grade in both systems:
ASME: SA-515/SA-515M Grade 65 (Identical to ASTM A515 for code construction).
ISO: ISO 9328-2: P295GH (This is the most common equivalent, though the correlation is not 1:1).
Comparative Differences
Chemical Composition: Allowable limits for Carbon, Manganese, and Silicon show slight variations. ISO 9328-2 P295GH typically has a lower maximum Carbon content and slightly different Mn ranges compared to A515 Gr.65, influencing weldability and strength.
Mechanical Property Requirements: Both specify minimum Yield Strength (ReH ~250 MPa) and Tensile Strength (Rm 410-560 MPa). However, test methods and sample orientation (e.g., transverse vs. longitudinal) may differ per the respective standard's prescribed procedures.
Inspection and Testing Scope: ISO 9328-2 often incorporates specific requirements for non-destructive testing (NDT), such as mandatory ultrasonic testing for certain thicknesses, which may be an additional purchase requirement in ASTM/ASME.
Certification and Marking: An ASME Material Certificate (with "SA" designation) is mandatory for ASME Code stamped vessels. ISO 9328-2 requires a Inspection Document 3.1 or 3.2 per EN 10204, with different content and responsibility declarations.
Use ASME SA-515 Gr.65 for projects following ASME Boiler and Pressure Vessel Code (e.g., in North America).
Use ISO 9328-2 P295GH for projects adhering to European standards (PED/EN) or international tenders specifying ISO.
