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A7

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T30106 T30107
#A7

Description

USA ASTM A7 Alloy tool steel and A7 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: A7
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy A7 ASTM USA Alloy tool steel
A2
T30102
A3
T30103
A4
T30104
A5
T30105
A6
T30106

Chemical composition(mass fraction)(wt.%) of the A7

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%) W(%)
2.00～2.85 0.10～0.50 0.20～0.80 ≤0.030 ≤0.030 5.00～5.75 0.90～1.40 3.90～5.15 0.50～1.50

Mechanical Properties of steel grade A7

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)
259 (≥) 455 (≥) 42 23 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade A7

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
44 - -     0.33 -  
912 884 - 24.3 442   -  
536 - 12 42.2   413 322

Heat Treatment of steel grade A7

Heat treated : 1464°C - 1719°C

Technological Curves of steel grade A7

Cross Reference Table (Equivalent Grade) of A7

Grade Standard Country Application
A7 ASTM USA Alloy tool steel
CA70T AS Australia Australia Structural steel
A70204 GBT China China structural steel and alloy steel
A70284 GBT China China structural steel and alloy steel
A70354 GBT China China structural steel and alloy steel
A71145 GBT China China structural steel and alloy steel
A71204 GBT China China structural steel and alloy steel
A71354 GBT China China structural steel and alloy steel
A74204 GBT China China structural steel and alloy steel
A73154 GBT China China structural steel and alloy steel
A73204 GBT China China structural steel and alloy steel
T30106 T30107
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