SFQA Class4

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Japan JIS SFQAClass4 铁路机车车辆车轴 - 质量要求 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SFQAClass4 / SFQA Class4

Category	Grade	Standard	Region/Area	Standard Content
Metals	SFQA Class4	JIS E4502-1	Japan	铁路机车车辆车轴 - 质量要求

Chemical composition(mass fraction)(wt.%) of the SFQA Class4

Element	Min	Max	Similar
S	-	0.0400	-
P	-	0.0350	-

Mechanical Properties of steel grade SFQA Class4

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)
421 (≥)	694 (≥)	24	31	11	Solution and Aging, Annealing, Ausaging, Q+T,etc	324

Physical Properties of steel grade SFQA Class4

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
31	-	-			0.24	-
425	751	-	31.3	411		-
562	-	13	22.2			432	221

Heat Treatment of steel grade SFQA Class4

Heat treated : 1229°C - 1879°C

Technological Curves of steel grade SFQA Class4

No Curve

Cross Reference Table (Equivalent Grade) of SFQA Class4

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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Stainless Steels

Tube/Pipe

Steel Profiles

Cold rolled/hot rolled

Wire rod

Quality special steel

Superalloy & High Temperature Alloy