ASTM A302 Grade C Mn-Mo-Ni Steel
Alloy Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength620MPa
Yield Strength390MPa
Brinell Hardness190HB
Maximum Service Temperature410°C
Chemical Composition
C
0 to 0.25%
NI
0.4 to 0.7%
MO
0.45 to 0.6%
MN
1.2 to 1.5%
SI
0.15 to 0.4%
P
0 to 0.035%
S
0 to 0.035%
FE
96.5 to 97.9%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
23 %
Fatigue Strength
280 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
390 MPa
Tensile Strength: Ultimate (UTS)
620 MPa
Tensile Strength: Yield (Proof)
390 MPa
Hardness
Brinell Hardness
190
Physical
Density
7.9 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
39 W/m-K
Thermal Diffusivity
10 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
18 points
Electrical
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.4 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
410 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
2.8 % relative
Embodied Carbon
1.6 kg CO 2 /kg material
Embodied Energy
21 MJ/kg
Embodied Energy
21 MJ/kg 9.0 x 10 3 BTU/lb
Embodied Water
50 L/kg
Embodied Water
50 L/kg 5.9 gal/lb
Registered Designations & Aliases
ASTM A302 Grade C Mn-Mo-Ni Steel
Standards
ASTM A302 ASTM A302: Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
ASTM A302 ASTM A302: Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel 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