620-440

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#620-440

Description

BS 620-440 Alloy Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Alloy Steel: 620-440

Category	Type	Steel Grade	Standard
Steel Grades	Alloy Steel	620-440	BS
		DIN 1.7228
		DIN 1.7511
		DIN 1.8159
		DIN 1.0204
		11562
		11564
		13CrMo4-4
		STPA20
		STPA22
		15CD3.5

Chemical composition(mass fraction)(wt.%) of the 620-440

C	Si	Mn	Ni	S	P	Cr	Mo	W	V	Ti	Cu
0.09 - 0.16	0.17 - 0.37	0.4 - 0.7	max 0.3	max 0.025	max 0.03	0.4 - 0.7	0.4 - 0.6	max 0.2	max 0.05	max 0.03	max 0.2

Mechanical Properties of steel grade 620-440

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)
199 (≥)	764 (≥)	21	32	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	332

Physical Properties of steel grade 620-440

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
44	-	-			0.22	-
636	685	-	12.3	424		-
974	-	42	14.2			113	341

Heat Treatment of steel grade 620-440

Heat treated : 1975°C - 1589°C

Technological Curves of steel grade 620-440

No Curve

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