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A9

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T30108 T30109
#A9

Description

USA ASTM A9 Alloy tool steel and A9 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: A9
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy A9 ASTM USA Alloy tool steel
A4
T30104
A5
T30105
A6
T30106
A7
T30107
A8
T30108

Chemical composition(mass fraction)(wt.%) of the A9

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) V(%)
0.45～0.55 0.95～1.15 0.20～0.50 ≤0.030 ≤0.030 4.75～5.50 1.25～1.75 1.30～1.80 0.80～1.40

Mechanical Properties of steel grade A9

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)
381 (≥) 349 (≥) 34 42 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade A9

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 - -     0.34 -  
143 555 - 42.3 214   -  
811 - 22 11.2   432 443

Heat Treatment of steel grade A9

Heat treated : 1945°C - 1947°C

Technological Curves of steel grade A9

Cross Reference Table (Equivalent Grade) of A9

Grade Standard Country Application
A9 ASTM USA Alloy tool steel
T30108 T30109
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