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AISI A9 |
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Category | Steel |
Class | Tool steel |
Type | Air-hardening medium-alloy cold work steel |
Designations |
United States: ASTM A681
, FED QQ-T-570
, UNS T30109
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Composition |
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Element | Weight % |
C |
0.45-0.55 |
Mn |
0.50 |
Si |
0.95-1.15 |
Cr |
4.75-5.50 |
Ni |
1.25-1.75 |
Mo |
1.30-1.80 |
V |
0.80-1.40 |
Cu |
0.25 |
P |
0.03 |
S |
0.03 |
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Mechanical Properties |
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Properties | Conditions |
T (°C) | Treatment |
Density (×1000 kg/m3) |
7.78 |
25 |
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Poisson's Ratio |
0.27-0.30 |
25 |
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Elastic Modulus (GPa) |
190-210
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25 |
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Thermal Properties |
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Properties | Conditions |
T (°C) | Treatment |
Thermal Expansion (10-6/ºC) |
12 |
20-425 more |
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