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D7

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T30405 T30407
#D7

Description

USA ASTM D7 Alloy tool steel and D7 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: D7
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy D7 ASTM USA Alloy tool steel
T30109
A10
T30110
D2
D3
T30403
D4
T30404
D5
T30405

Chemical composition(mass fraction)(wt.%) of the D7

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%)
2.15～2.50 0.10～0.60 0.10～0.60 ≤0.030 ≤0.030 11.5～13.5 0.70～1.20 3.80～4.40

Mechanical Properties of steel grade D7

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
434 (≥) 358 (≥) 41 33 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade D7

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
41 - -     0.33 -  
988 868 - 13.3 434   -  
648 - 42 12.2   133 423

Heat Treatment of steel grade D7

Heat treated : 1323°C - 1113°C

Technological Curves of steel grade D7

Cross Reference Table (Equivalent Grade) of D7

Grade Standard Country Application
D7 ASTM USA Alloy tool steel
SKD7 JIS Japan Hot-work die steel
ZGD730-910 GBT China Low alloy steel castings for general engineering and structural purposes
ZGD730-910 GBT China Low alloy steel castings for general engineering and structural purposes
T30405 T30407
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