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ASTM A516 Grade 70, ASTM A516 Grade 70 Bolt, Nuts, ASTM A240 Bolt Manufacturer in India – Ananka Group

ASTM A516 Grade 70 is a high-strength 5 percent chromium ferritic steel used to manufacture bolts, studs, stud bolts, and other fasteners for bolting pressure vessels, valves, flanges, and fittings, particularly in the power generation industry. The ASTM A240 standard includes alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings used in high temperature or high-pressure applications, as well as other special applications. There are many grades covered, including ferritic steels and austenitic stainless steels with designations such as B5, B6, B7, B8, B8M, and so on.

ASTM A516 Grade 70 Chemical Composition

Carbon (C)	%
12.5mm or less 12.5 – 50mm 50 – 100mm 100 – 200mm > 200mm	0.27 0.28 0.30 0.31 0.31
Manganese (Mn)	%
12.5mm or less • Heat Analysis : • Product Analysis :Over 12.5mm • Heat Analysis : • Product Analysis :	0.85-1.20 0.79-1.300.85-1.20 0.79-1.30
Phosphorus (P)	%
(max)	0.035
Sulphur (S)	%
(max)	0.035
Silicon (Si)	%
• Heat Analysis : • Product Analysis :	0.15-0.40 0.13-0.45

ASTM A516 Grade 70 Mechanical Composition

DESCRIPTION	GRADE 70
Tensile strength (KSI)	70-90
Tensile strength (MPa)	485-620
Yield strength (KSI)	38
Yield strength (MPa)	260
Elongation in 200mm (min)(%)	17
Elongation in 50mm (min) (%)	21
Thickness (Max)(mm)	205