ASTM A732 Grade 9Q Cast Steel
Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength1170MPa
Yield Strength890MPa
Brinell Hardness350HB
Maximum Service Temperature430°C
Chemical Composition
C
0.25 to 0.35%
CR
0.7 to 0.9%
NI
1.7 to 2.0%
MO
0.2 to 0.3%
MN
0.4 to 0.7%
SI
0.2 to 0.8%
P
0 to 0.040%
S
0 to 0.045%
CU
0 to 0.5%
W
0 to 0.1%
FE
94.3 to 96.6%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
7.0 %
Fatigue Strength
520 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Tensile Strength: Ultimate (UTS)
1170 MPa
Tensile Strength: Yield (Proof)
890 MPa
Hardness
Brinell Hardness
350
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
430 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
46 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
35 points
Electrical
Electrical Conductivity: Equal Volume
7.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.8 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
76 MJ/m 3
Resilience: Unit (Modulus of Resilience)
2100 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
42 points
Strength to Weight: Bending
32 points
Environmental
Base Metal Price
3.7 % relative
Embodied Carbon
1.7 kg CO 2 /kg material
Embodied Energy
22 MJ/kg
Embodied Energy
22 MJ/kg 9.7 x 10 3 BTU/lb
Embodied Water
54 L/kg
Embodied Water
54 L/kg 6.4 gal/lb
Registered Designations & Aliases
ASTM A732 Grade 9Q Cast Steel
Standards
ASTM A732 ASTM A732: Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
ASTM A732 ASTM A732: Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005