ASTM A372 Grade G Alloy Steel
Alloy Steels
normalized
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength650MPa
Yield Strength430MPa
Brinell Hardness200HB
Maximum Service Temperature410°C
Chemical Composition
C
0.25 to 0.35%
CR
0.4 to 0.65%
MO
0.15 to 0.25%
MN
0.7 to 1.0%
SI
0.15 to 0.35%
P
0 to 0.015%
S
0 to 0.010%
FE
97.4 to 98.4%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
22 %
Fatigue Strength
310 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
410 MPa
Tensile Strength: Ultimate (UTS)
650 MPa
Tensile Strength: Yield (Proof)
430 MPa
Hardness
Brinell Hardness
200
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
410 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
46 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
130 MJ/m 3
Resilience: Unit (Modulus of Resilience)
500 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
2.2 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.4 x 10 3 BTU/lb
Embodied Water
49 L/kg
Embodied Water
49 L/kg 5.8 gal/lb
Registered Designations & Aliases
ASTM A372 Grade G Alloy Steel
Standards
ASTM A372 ASTM A372: Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels
ASTM A372 ASTM A372: Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005 Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015