ASTM A516 GD 70 - Pressure Vessel Steel

 

Description

ASTM A516 Grade 70 is a boiler / pressure vessel quality of steel plate for use in low to moderate services.

It has improved notch toughness.

A516 GD70 steel plate is equivalent to the P355GH and 490B grades. 

 

Typical Applications

Pressure vessels

Boilers

Valves

Heat exchangers

 

Steelmaking

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

 

Lab-Certified Materials & Non-Standard Sizes Available

Speak to your account manager about the cost-savings benefits of lab-certified plate and the potential for reduced wastage when choosing non-standard sizes. 

 

What's the difference between ASTM A516 Gr. 70 and ASME SA516 Gr. 70? In fact, the mechanical and chemical properties of the steels are identical and it is the producer of the standard that is the key difference. ASTM, the American Society for Testing and Materials, produces standards that define limits and parameters on a product’s properties and the methods of testing those properties. ASME, the American Society of Mechanical Engineers, specifies materials to be used in the manufacture and construction of particular items. The relevance of this to pressure vessels is that ASME publishes design codes and standards for the manufacture of vessels and within these a particular material standard will be endorsed. ASME “acquires” ASTM specifications in this way and its pressure vessel code committee assigns an “S” to the relevant ASTM standard. So A516 becomes SA516 when ASME acquires it.