ASTM A732 Grade 3Q Cast Steel
Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength770MPa
Yield Strength710MPa
Brinell Hardness230HB
Maximum Service Temperature400°C
Chemical Composition
C
0.35 to 0.45%
CR
0 to 0.35%
NI
0 to 0.5%
MN
0.7 to 1.0%
SI
0.2 to 1.0%
P
0 to 0.040%
S
0 to 0.045%
CU
0 to 0.5%
W
0 to 0.1%
FE
96 to 98.8%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
10 %
Fatigue Strength
430 MPa
Poisson's Ratio
0.29
Shear Modulus
72 GPa
Tensile Strength: Ultimate (UTS)
770 MPa
Tensile Strength: Yield (Proof)
710 MPa
Hardness
Brinell Hardness
230
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
400 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
43 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
23 points
Electrical
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
75 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1340 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
24 points
Environmental
Base Metal Price
2.3 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
19 MJ/kg
Embodied Energy
19 MJ/kg 8.4 x 10 3 BTU/lb
Embodied Water
48 L/kg
Embodied Water
48 L/kg 5.7 gal/lb
Registered Designations & Aliases
ASTM A732 Grade 3Q 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