U71

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China GB U71 铁路用每米38-50公斤钢轨技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: U71 / U71

Category	Grade	Standard	Region/Area	Standard Content
Metals	U71	GB 2585	China	铁路用每米38-50公斤钢轨技术条件

Chemical composition(mass fraction)(wt.%) of the U71

Element	Min	Max	Similar

The data is being updated,

Mechanical Properties of steel grade U71

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)
671 (≥)	277 (≥)	21	42	24	Solution and Aging, Annealing, Ausaging, Q+T,etc	243

Physical Properties of steel grade U71

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
43	-	-			0.12	-
333	475	-	22.3	323		-
212	-	21	41.2			143	122

Heat Treatment of steel grade U71

Heat treated : 1767°C - 1443°C

Technological Curves of steel grade U71

No Curve

Cross Reference Table (Equivalent Grade) of U71

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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U71