ASTM A193 Grade B7m Bolt, Nuts, Washers Manufacturer in India

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ASTM A193 Grade B7m, ASTM A193 Grade B7m Bolt, Nuts, ASTM A193 Bolt Manufacturer in India – China Inconel Bolts Inc.

ASTM A193 Grade B7m 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 A193 Grade B7m Chemical Composition

Element	Alloy Steel
	Chromium Molybdenum Steel^A
	Composition^B, %
Carbon	0.37 – 0.49^C
Manganese	0.65 – 1.10
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.15 – 0.35
Chromium	0.75 – 1.20
Molybdenum	0.15 – 0.25

ASTM A193 Grade B7m Mechanical Composition

Diameter, inch.	Tensile Strength, min, ksi	Yield Strength, min, 0.2% offset, ksi	Elongation in 4D, min, %	Reduction of Area, min, %	Hardness, max
4 and under	100	80	18	50	235 HBW or 99 HRB
over 4 to 7, inclusive	100	75	18	50	235 HBW or 99 HRB