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Major Categories of Common Valve Materials (2)

Date：2018-02-03

Chemical Composition
Grade	C(Max)	Si(Max)	Mn(Max)	P(Max)	S(Max)	Cr	Mo	Ni	N(Max)
304L	0.030	1.00	2.00	0.045	0.030	18.00/20.00	-	8.00/13.00	0.10
304	0.080	1.00	2.00	0.045	0.030	18.00/20.00	-	8.00/11.00	0.10

Chemical Properties
Grade	Yield Strength Min (Mpa)		Tensile Strength Min (Mpa)		Elongation(%) Min		Reduction of Area(%) Min (50mm)		Hardness Max
Grade	Yield Strength Min (Mpa)		Tensile Strength Min (Mpa)		Elongation(%) Min		Reduction of Area(%) Min (50mm)		HB	HRB
304L	170		485		30		50		201*	92*
304	205		515		30		50		201*	92*
*Maximum hardness not specified in ASTM A182/A182M-13

Applications
FORGING SPECIFICATION	COMMON DESIGNATION		MATERIAL SUFFIX		WROUGHT BAR SPECIFICATION	SERVICE RECOMMENDATIONS(1)			COMMON API TRIM# FOR BASE MATERIAL
FORGING SPECIFICATION	COMMON DESIGNATION		MATERIAL SUFFIX		WROUGHT BAR SPECIFICATION	SERVICE RECOMMENDATIONS(1)			150 TO 600#	900 TO 2500#
ASTM A182 F304	18% Chrome; 8% Nickel; 0.08% C Stainless Steel		AS T M A351 Grade CF8		ASTM A479 304	Corrosive or extremely high temperature non-corrosive services between -450ºF (-268ºC) and +1200ºF (+649ºC). Above +800ºF (+425ºC) specify carbon content of 0.04% or greater.			2	2, 15
ASTM A182 304L	18% Chrome; 8% Nickel; 0.03% C Low Carbon Stainless Steel		ASTM A 351 Grade CF3		ASTM A479 304L	Brackish water, phosphate solutions, pressurised water @ 570ºF (299ºC), sea water, steam.			304L+HFS	304L+HF
ASTM A182 F304H	18% Chrome; 8% Nickel; 0.08% C Stainless Steel		AST M A351 Grade CF10		ASTM A479 304H	Corrosive or extremely high temperature non-corrosive services between -450ºF (-268ºC) and +1200ºF (+649ºC). Above +800ºF (+425ºC) specify carbon content of 0.04% or greater.			304H+HFS	304H+HF

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