439

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439 Stainless Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Stainless Steel: 439

Category	Type	Steel Grade
Steel Grades	Stainless Steel	439
		S42010
		S420F
		S42020
		420FSe
		S42023
		616
		S42200
		S42225
		619
		S42300

Chemical composition(mass fraction)(wt.%) of the 439

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.030	1.00	1.00	0.040	0.030	17.0-19.0	≤0.50
Mo	Al	Cu	Nb	Ti	V	Ce
	≤0.15			0.20+4(C+N)~1.10
N	Co	Pb	B	Other
≤0.030

Mechanical Properties of steel grade 439

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
478 (≥)	932 (≥)	32	34	32	Solution and Aging, Annealing, Ausaging, Q+T,etc	141

Physical Properties of steel grade 439

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
14	-	-			0.32	-
921	966	-	42.3	412		-
477	-	42	12.2			111	212

Heat Treatment of steel grade 439

Heat treated : 1137°C - 1182°C

Technological Curves of steel grade 439

No Curve

Cross Reference Table (Equivalent Grade) of 439

Grade	Standard	Country	Application
1.4439			austenitic special steel
1.4439(AFNOR)	AFNOR	France	Austenite
SNCM439		China	China Taiwan Structural steel

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Rfq.: sales@longhaisteel.com

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439