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ASTM A276 Type 904L, ASTM A276 Type 904L Bolt, Nuts, ASTM A240 Bolt Manufacturer in India – Ananka Group

ASTM A276 Type 904L 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 A276 Type 904L Chemical Composition

Identification Symbol	UNS Number	Grade	Elements	Composition %
F904L	N08904	21 chromium, 26 nickel, 4.5 molybdenum	Carbon	0.02 max
			Manganese	2.00 max
			Phosphorus	0.045 max
			Sulfur	0.035 max
			Silicon	1.00 max
			Nickel	23.00 – 28.00
			Chromium	19.00 – 23.00
			Molybdenum	4.00 – 5.00
			Copper	1.00 – 2.00
			Nitrogen	0.10 max

ASTM A276 Type 904L Mechanical Composition

Property	Value
Finish	Hot-Finished & Cold Finished
Tensile Strength, min, ksi [MPa]	71 [490]
Yield Strength, min, ksi [MPa]	31 [215]
Elongation in 2 in. [50mm] or 4D, min, %	35
Reduction or Area, min, %	—
Brinell Hardness Number, HBW	—