25-4-4

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#25-4-4

Description

25-4-4 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: 25-4-4

Category	Type	Steel Grade
Steel Grades	High Alloy	25-4-4
		TPXM-33
		S44626
		18Cr-2Mo
		S44400
		29-4
		S44700
		29-4-2
		S44800
		26-3-3
		S44660

Chemical composition(mass fraction)(wt.%) of the 25-4-4

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.025	0.75	1	0.04	0.03	24.5-26	3.5-4.5
Mo	Al	Cu	Nb	Ti	V	Ce
3.5-4.5
N	Co	Pb	B	Other
≤0.035				Ti+Nb0.2+4*(C+N)~0.8

Mechanical Properties of steel grade 25-4-4

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)
465 (≥)	347 (≥)	12	31	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	441

Physical Properties of steel grade 25-4-4

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	-	-			0.33	-
959	632	-	21.3	331		-
764	-	41	43.2			311	321

Heat Treatment of steel grade 25-4-4

Heat treated : 1868°C - 1115°C

Technological Curves of steel grade 25-4-4

No Curve

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Rfq.: sales@longhaisteel.com

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