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China T7 Carbon tool steel and T7 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: T7

Chemical composition(mass fraction)(wt.%) of the T7

C(%) Si(%) Mn(%) P(%) S(%)
0.65~0.74 ≤0.35 ≤0.40 ≤ 0.035 ≤ 0.030

Mechanical Properties of steel grade T7

Rp0.2 (MPa)
Rm (MPa)
KV/Ku (J)
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
841 (≥) 962 (≥) 22 42 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade T7

Modulus of elasticity
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
Specific thermal capacity
Specific electrical resistivity
(Ω mm²/m)
Poisson’s coefficient, ν
32 - -     0.14 -  
581 373 - 41.3 121   -  
538 - 33 23.2   323 112

Heat Treatment of steel grade T7

Heat treated : 1466°C - 1684°C

Technological Curves of steel grade T7

Cross Reference Table (Equivalent Grade) of T7

Grade Standard Country Application
T7 China Carbon tool steel
UNS T72301 UNS USA Carbon tool steel
W2-A ASTM USA Carbon tool steel
UNS T72302 UNS USA Carbon tool steel
T72305 UNS USA Carbon tool steel
CT75 SS Sweden Carbide for cutting tools
CT75 SS Sweden Carbide for cutting tools
T7MoNiCrl80 STAS/SR Romania Cast Steel
T7NiCrl80 STAS/SR Romania Cast Steel
T70MoCr280 STAS/SR Romania Cast Steel
T75Cr280 STAS/SR Romania Cast Steel
St70F ONORM Austria Austrian structural steel

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