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SA516 Gr. 70 Plates

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The A516 / SA516 standard, its full name is “Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service”, could almost be described as the default material specification for pressure vessel applications particularly outside of Europe and it is widely used by designers and engineers in many market sectors. You may also see the following variations:

ASTM A516 Gr. 70N or ASME SA516 Gr. 70N – the “N” is added to show that the steel is normalised

ASTM A516M or ASME SA516M – the “M” indicates that the material is certified in metric units

ASME SA516 Gr. 70 / ASTM A516 Gr. 70 - the specification

Despite its wide use and application, A516 / SA516 is a remarkably straightforward standard in its basic form with just five key chemical elements specified along with three mechanical properties. It does not even need to be heat treated in any way.

Chemical Requirements

Element

Thickness

Composition (%)

Note

Carbon (max)

12.5 mm and under

0.27

A, B, C

over 12.5 to 50 mm

0.28

A, B, C

over 50 to 100 mm

0.30

A, B, C

over 100 mm

0.31

A, B, C

Manganese

0.85 - 1.20

A, C

0.79 - 1.30

B, C

Phosphorus (max)

0.025

A, B

Sulphur (max)

0.025

A, B

Silicon

0.15 - 0.40

A

0.13 - 0.45

B

Mechanical Property

Value

Tensile Strength, MPa (ksi)

485 - 620 (70 - 90)

Yield Strength, min MPa (ksi)

260 (38)

Elongation min, % 200 mm (8 in)

17

Elongation min, % 50 mm (2 in)

21


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