4J40

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#4J40

Description

China GBT 4J40 expansionalloy and 4J40 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4J40

Category	Type	Steel Grade	Standard	Country	Application
Steel Grades	Special Alloy	4J40	GBT	China	expansionalloy
		3J60
		3J63
		4J06
		4J28
		4J29
		4J32
		4J33
		4J34
		4J36
		4J38

Chemical composition(mass fraction)(wt.%) of the 4J40

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Ni(％)	Co(%)	Fe(%)
0.05	≤0.15	≤0.25	0.020	0.020	32.4-33.4	7.0-8.0	Bal

Mechanical Properties of steel grade 4J40

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)
312 (≥)	462 (≥)	34	12	14	Solution and Aging, Annealing, Ausaging, Q+T,etc	311

Physical Properties of steel grade 4J40

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	-	-			0.23	-
114	134	-	41.3	314		-
181	-	32	41.2			413	223

Heat Treatment of steel grade 4J40

Heat treated : 1511°C - 1945°C

Technological Curves of steel grade 4J40

No Curve

Cross Reference Table (Equivalent Grade) of 4J40

Grade	Standard	Country	Application
4J40	GBT	China	expansionalloy

Available Suppliers

Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

Rfq.: sales@longhaisteel.com

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