439

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#439

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439 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: 439

Category	Type	Steel Grade
Steel Grades	High Alloy	439
		410S
		S41045
		S41050
		S41500
		S42035
		S42900
		429
		S43000
		430
		S43035

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

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.03	1	1	0.04	0.03	17-19	≤0.5
Mo	Al	Cu	Nb	Ti	V	Ce
	≤0.15			[0.2+4*(C+N)]~1.1
N	Co	Pb	B	Other
≤0.03

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)
748 (≥)	473 (≥)	33	24	11	Solution and Aging, Annealing, Ausaging, Q+T,etc	333

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
32	-	-			0.42	-
376	495	-	42.3	114		-
545	-	22	34.2			343	144

Heat Treatment of steel grade 439

Heat treated : 1286°C - 1327°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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439