4J78

Favorite Datasheet

#4J78

Description

China GBT 4J78 expansionalloy and 4J78 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 4J78

Category	Type	Steel Grade	Standard	Country	Application
Steel Grades	Special Alloy	4J78	GBT	China	expansionalloy
		4J40
		4J42
		4J43
		4J44
		4J45
		4J46
		4J47
		4J49
		4J50
		4J58

Chemical composition(mass fraction)(wt.%) of the 4J78

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Ni(％)	Mo(％)	Cu(%)
0.05	≤0.30	≤0.40	0.020	0.020	余	20.0-22.0	≤1.50

Mechanical Properties of steel grade 4J78

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)
996 (≥)	627 (≥)	34	22	33	Solution and Aging, Annealing, Ausaging, Q+T,etc	422

Physical Properties of steel grade 4J78

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	-	-			0.11	-
566	352	-	14.3	322		-
937	-	14	11.2			112	313

Heat Treatment of steel grade 4J78

Heat treated : 1611°C - 1459°C

Technological Curves of steel grade 4J78

No Curve

Cross Reference Table (Equivalent Grade) of 4J78

Grade	Standard	Country	Application
4J78	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

Do you supply this 4J78?
List your company on S&G now? Join
Non-paying users only

Stainless Steels

Tube/Pipe

Steel Profiles

Cold rolled/hot rolled

Wire rod

Quality special steel

Superalloy & High Temperature Alloy