ASTM A387 Grade 9 steel

ASTM A387 Grade 9 steel specification covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.

ASTM A387 Grade 9 material chemical composition

Grade	C	Mn	P	S	Si	Cr	Mo
9	0.15 max	0.25-0.66	0.030	0.030	1.05 max	7.90-10.10	0.85-1.15

ASTM A387 Grade 9 alloy steel mechanical properties

Grade	Tensile strength,ksi,mpa	Yield strength,ksi,mpa	Elongation 8in or 200mm,%,≥	Elongation 2in or 50mm,%,≥
Grade 9	60-85(415-585)	30(205)	....	18

ASTM A387 Grade 9 steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium.

ASTM A387 Grade 9 steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.

ASTM A387 Grade 9 steel heat treatment:

ASTM A387 Grade 9 Steel plate should be heat treatment, heat treatment method for annealing, normalizing and tempering, or when the buyer agreed to, from the austenitizing temperature using the method of cold air blast or liquid quenching accelerated cooling, subsequent tempering, the tempering temperature for 1250 oF(675oC).

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