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A8

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T30107 T30108
#A8

Description

USA ASTM A8 Alloy tool steel and A8 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: A8
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy A8 ASTM USA Alloy tool steel
A3
T30103
A4
T30104
A5
T30105
A6
T30106
A7
T30107

Chemical composition(mass fraction)(wt.%) of the A8

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) W(%) Cu(%)
0.50～0.60 0.75～1.10 0.20～0.50 ≤0.030 ≤0.030 4.75～5.50 ≤0.75 1.15～1.65 1.00～1.50 ≤0.75

Mechanical Properties of steel grade A8

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)
318 (≥) 956 (≥) 21 11 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade A8

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 - -     0.22 -  
545 342 - 32.3 114   -  
589 - 11 31.2   413 113

Heat Treatment of steel grade A8

Heat treated : 1885°C - 1751°C

Technological Curves of steel grade A8

Cross Reference Table (Equivalent Grade) of A8

Grade Standard Country Application
H10 ASTM USA Alloy tool steel
A8 ASTM USA Alloy tool steel
CA85T AS Australia Australia Structural steel
T30107 T30108
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