A515 Grade 70 is a carbon‑silicon pressure vessel steel plate designed for intermediate‑temperature service in boilers, drums, and welded pressure vessels. It offers higher strength than Grade 60 and Grade 65, stable fabrication performance, and consistent behavior across different thickness ranges. The grade is widely used in petrochemical, power generation, and industrial pressure systems requiring dependable plate quality.

Chemical Composition (ASTM A515/A515M)

• Carbon: 0.24–0.30%

• Manganese: 0.60–0.90%

• Silicon: 0.15–0.40%

• Phosphorus: ≤ 0.035%

• Sulfur: ≤ 0.035%

The carbon‑silicon alloy system provides balanced strength and weldability for pressure vessel fabrication.

Mechanical Properties

• Tensile Strength: 485–620 MPa

• Yield Strength: ≥ 260 MPa

• Elongation:

  • ≥ 17% (200 mm gauge length)

  • ≥ 21% (50 mm gauge length)

These values support safe operation in intermediate‑temperature pressure systems.

Size Range (Website 5 Standard Template)

Thickness: 3–150 mm Width: 1220–4200 mm Length: 5000–18000 mm

Stock & Processing Services

Cutting • Beveling • Welding preparation • Heat treatment • Custom fabrication for pressure vessels

Applications

• Boilers and pressure drums

• Industrial pressure vessels

• Petrochemical equipment

• Power generation components