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ASTM A276 Type 321-2, ASTM A276 Type 321-2 Bolt, Nuts Manufacturer in India – Ananka Group

ASTM A276 Type 321-2 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 A193 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 A276 Type 321-2 Chemical Composition

Grade Symbol	UNS Number	Elements	Composition, %
Type 321	S32100	Carbon	0.08 max
Manganese	2.00 max
Phosphorus	0.045 max
Sulfur	0.030 max
Silicon	1.00 max
Chromium	17.00 – 19.00
Nickel	9.00 – 12.00
Titanium	5×(C+N)-0.70

ASTM A276 Type 321-2 Mechanical Composition

Property	Value
Finish	Hot-Finished & Cold Finished
Tensile Strength, min, ksi [MPa]	75 [515]
Yield Strength, min, ksi [MPa]	30 [205]
Elongation in 2 in. [50mm] or 4D, min, %	40
Reduction or Area, min, %	50
Brinell Hardness Number, HBW	….