ASTM A193 Grade B8 Bolt, Nuts, Washers Manufacturer in India

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ASTM A193 Grade B8, ASTM A193 Grade B8 Bolt, Nuts, ASTM A193 Bolt Manufacturer in India – China Inconel Bolts Inc.

ASTM A193 Grade B8 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 B8 Chemical Composition

Carbon	Manganese, max	Phosphorus, max	Sulfur, max	Silicon	Chromium
0.08	2.00	0.045	0.030	1.00	18.0-20.0

ASTM A193 Grade B8 Mechanical Composition

Grade	Diameter	Tensile Strength	Yield Strength	Elongation	Reduction	Hardness
Grade B8, B8M, Class 1, 1D	All Diameters	515	205	30	50	223 HBW or 96 HRB
Grade B8, B8C, B8T, Class 2	M20 and under	860	690	12	35	321 HBW or 35 HRC
Grade B8, B8C, B8T, Class 2	M20 to M24, inclusive	690	550	20	45	321 HBW or 35 HRC
Grade B8, B8C, B8T, Class 2	M24 to M30, inclusive	655	450	25	45	321 HBW or 35 HRC
Grade B8, B8C, B8T, Class 2	M30 to M36, inclusive	620	345	30	45	321 HBW or 35 HRC
Grade B8, B8M2, Class 2B	M48 and under	655	515	25	40	321 HBW or 35 HRC
Grade B8, B8M2, Class 2B	M48 to M64, inclusive	620	450	30	40	321 HBW or 35 HRC
Grade B8, B8M2, Class 2B	M64 to M72, inclusive	550	380	30	40	321 HBW or 35 HRC