ASTM A387 Grade 11 steel

ASTM A387 Grade 11 steel Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum.

ASTM A387 Grade 11 steel for welded boilers and pressure vessels designed for elevated temperature service.

Materials considered under ASTM A387 standard specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91.

ASTM A387 Grade 11 steel materials shall be killed and shall be thermally treated.

ASTM A387 Grade 11 material chemical composition

Grade	C	Mn	P	S	Si	Cr	Mo
11	0.04-0.17	0.35-0.73	0.035	0.035	0.44-0.86	0.94-1.56	0.40-0.70

ASTM A387 Grade 11 alloy steel mechanical properties

Grade	Tensile strength,ksi,mpa	Yield strength,ksi,mpa	Elongation 8in or 200mm,%,≥	Elongation 2in or 50mm,%,≥
Grade 11	60-85(415-585)	35(240)	19	22

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