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A516 Gr 70 Datasheet – Mechanical, Chemical, and Technical Specifications

Table of Contents

What Is ASTM A516 Gr 70 and Why Is It Used?

A516 Grade 70 is a carbon steel pressure vessel plate known for its high strength, notch toughness, and reliable weldability. It is widely used in:

  • Boiler fabrication
  • Heat exchangers
  • Pressure vessels
  • Industrial process tanks
  • LPG vessels and cryogenic systems

It complies with ASTM A516 / ASME SA516 standards, designed for moderate and lower temperature service.

Standard Compliance & Manufacturing Scope

Available in normalized, as-rolled, or stress-relieved conditions, A516 Gr 70 plates can be supplied under:

  • ASTM A516 / ASME SA516
  • IBR Certification for Indian steam boilers
  • NACE MR0175 (on request)
  • HIC Tested variants for sour service

Typical Applications of A516 Grade 70

  1. Thermal power plant steam boilers
  2. Oil & gas storage tanks
  3. Refinery columns and spheres
  4. Cryogenic separation vessels
  5. Ammonia reactors

Chemical Composition of A516 Gr 70

Element Content (%)
Carbon (C) ≤ 0.27
Manganese (Mn) 0.85–1.20
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.035
Silicon (Si) 0.13–0.45

Note: Lower carbon content ensures excellent weldability.

Mechanical Properties of A516 Gr 70 Plate

Property Value (Typical)
Yield Strength (min) 260 MPa (37 ksi)
Tensile Strength 485–620 MPa (70–90 ksi)
Elongation (200 mm) ≥ 17%
Elongation (50 mm) ≥ 21%
Impact Toughness ≥ 20 Joules @ -20°C
Hardness (Brinell) 140–180 HB (typical)

Plates are typically normalized to improve toughness.

Available Sizes, Tolerances & Finishes

Specification Range
Thickness 6mm to 150mm
Width Up to 3000mm
Length Up to 12000mm
Tolerances As per ASTM A20/A20M
Finish Hot rolled / Normalized

Optional: Bevelled edges, ultrasonic tested (UT), shot-blasted, and primer coated available.

Heat Treatment Options for A516 Gr 70

  • As Rolled
  • Normalized (standard for Class 2 applications)
  • Stress-Relieved (on request)
  • N+T (Normalized + Tempered) for severe service vessels

Certifications and Testing

All A516 Gr 70 plates from Hindustan Steel Corporation are supplied with:

  • Mill Test Certificate (MTC) as per EN 10204 3.1
  • IBR Form IIIA for Indian boilers
  • Ultrasonic testing per EN 10160 or ASTM A578
  • HIC / NACE tested plates available

Optional Testing: PWHT simulation, Charpy impact, flattening, tensile, hardness.

Export Destinations & Client Industries

We supply A516 Gr 70 steel plates to:

  • Power plants in UAE, Saudi Arabia, and Africa
  • EPC contractors and pressure vessel manufacturers in Vietnam, Indonesia, and Bangladesh
  • Petrochemical units, fertilizer plants, and LNG terminals worldwide

FAQs for A516 Gr 70 Datasheet

Yes, especially in normalized condition with proper impact testing.

Post-weld heat treatment is optional but recommended for plates above 50mm or critical applications.

Common thicknesses range from 6mm to 150mm, with cut-to-size available.

Yes, it is frequently used in LPG tanks, provided it meets required design codes

Request Quote A516 Gr 70 Datasheet

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