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Structural & plate steelPressure-vessel plateTG-MG-042 · Rev. 0 · October 2026

ASTM A516 Gr.70 — Chemical Composition & Mechanical Properties

ASTM A516 Gr.70 is an ASTM specification for pressure-vessel plate (UNS K02700). This sheet summarises its chemical composition limits and minimum mechanical properties. Typical use: pressure vessels, plate flanges, moderate & lower temperature.

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Chemical composition of ASTM A516 Gr.70 (weight %)

C0.27 max (≤12.5 mm) to 0.31 max (>100 mm)
Mn0.85–1.20
P max0.025
S max0.025
Si0.15–0.40
Cr—
Ni—
Mo—

Mechanical properties

Tensile strength, min485 MPa
Yield strength, min260 MPa
Elongation, min21 %
HardnessNot specified

Heat treatment

As-rolled up to 40 mm; normalized above 40 mm (or when specified)

Typical service

Pressure vessels, plate flanges, moderate & lower temperature

Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.

FAQ

ASTM A516 Gr.70: common questions

What is the minimum yield strength of ASTM A516 Gr.70?

260 MPa, with a minimum tensile strength of 485 MPa.

What is the carbon content of ASTM A516 Gr.70?

0.27 max (≤12.5 mm) to 0.31 max (>100 mm) %.

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