What is A517 gr.a Grades Specifications equivalent?

ASTM A517 Grade A Equivalent Grades – Professional Cross Reference Guide by Gangsteel

Gangsteel is a leading supplier of ASTM A517 Grade A (and ASME SA-517 Grade A) high-strength quenched and tempered alloy steel plates for pressure vessel applications. Below is a clear and practical equivalent table.

ASTM A517 Grade A Equivalent Materials Table

Key Specifications for ASTM A517 Grade A

• Maximum Thickness: 1.25 in. [32 mm] (thinnest limit among A517 grades)
• Heat Treatment: Quenched and tempered
• Mechanical Properties(typical for plates ≤ 1.25 in. thick):
  • Yield Strength: min. 100 ksi (690 MPa)
  • Tensile Strength: 115–135 ksi (795–930 MPa)
  • Elongation in 2 in. [50 mm]: min. 16%
• Main Applications: Fusion-welded boilers, pressure vessels, and high-strength structural components requiring good toughness and weldability.
• HIC / NACE Versions: Gangsteel can supply A517 Grade A HIC + NACE MR0175 / ISO 15156 compliant plates with enhanced cleanliness (very low S, Ca-treated) for sour service when required.

Important Note: A517 Grade A and A514 Grade A have identical chemical composition and mechanical properties. The only difference is the end-use: A517 is for pressure vessels (per ASTM A20), while A514 is for structural applications (per ASTM A6).

Gangsteel maintains inventory of ASTM A517 Grade A plates (including HIC/NACE versions) with full EN 10204 3.1 / 3.2 certification and all supplementary requirements (HIC per NACE TM0284, ultrasonic testing, hardness control, etc.).

If you need a detailed chemical composition table, mechanical properties comparison, or assistance selecting the best equivalent for your pressure vessel project, please contact Gangsteel directly. We provide fast quotations, technical support, and reliable global delivery.