What is A517 gr p equivalent grade?

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

Gangsteel specializes in supplying ASTM A517 Grade P (and ASME SA-517 Grade P) high-strength quenched and tempered alloy steel plates for pressure vessel applications. Below is a clear and practical equivalent table for engineers and procurement teams.

ASTM A517 Grade P Equivalent Materials Table

Important Notes on ASTM A517 Grade P

• Maximum Thickness: Up to 4 in. (100 mm) – the thickest among A517 grades.
• Mechanical Properties(typical quenched & tempered condition):
  • Yield Strength: min. 690 MPa (100 ksi) for ≤65 mm; slightly lower for thicker plates.
  • Tensile Strength: 795–930 MPa (115–135 ksi).
  • Elongation: min. 16%.
• Chemical Composition Highlights(Grade P): Higher nickel (Ni 1.15–1.55%) and specific Cr-Mo-V-B alloying for excellent hardenability and toughness.
• HIC / NACE Versions: Gangsteel can supply A517 Grade P HIC + NACE MR0175 / ISO 15156 compliant plates with enhanced cleanliness (low S, Ca-treated) for sour service applications.
• A514 vs A517: A514 Grade P and A517 Grade P have identical chemical composition and mechanical properties. The only difference is the intended end-use (A517 for pressure vessels, A514 for structural/welded bridges).

Gangsteel maintains a large inventory of ASTM A517 Grade P plates (including HIC/NACE versions) in thicknesses from 6 mm to 150 mm, with full EN 10204 3.1 / 3.2 certification and all supplementary requirements (HIC per NACE TM0284, hardness control, ultrasonic testing, etc.).

If you need a detailed chemical composition table, mechanical properties comparison, or assistance selecting the best equivalent for your pressure vessel or high-strength application, please contact Gangsteel directly. We provide fast quotation, technical support, and reliable delivery worldwide.