ASTM A372 Grade M Alloy Steel
Alloy Steels
quenched and tempered
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength910MPa
Yield Strength770MPa
Brinell Hardness280HB
Maximum Service Temperature450°C
Chemical Composition
C
0 to 0.23%
CR
1.5 to 2.0%
NI
2.8 to 3.9%
MO
0.4 to 0.6%
MN
0.2 to 0.4%
SI
0 to 0.3%
P
0 to 0.015%
S
0 to 0.010%
V
0 to 0.080%
FE
92.5 to 95.1%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
18 %
Fatigue Strength
520 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
570 MPa
Tensile Strength: Ultimate (UTS)
910 MPa
Tensile Strength: Yield (Proof)
770 MPa
Hardness
Brinell Hardness
280
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
450 °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
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
27 points
Electrical
Electrical Conductivity: Equal Volume
8.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.1 % IACS
Calculated
PREN (Pitting Resistance)
3.4
Resilience: Ultimate (Unit Rupture Work)
160 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1580 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
27 points
Environmental
Base Metal Price
5.0 % relative
Embodied Carbon
2.0 kg CO 2 /kg material
Embodied Energy
27 MJ/kg
Embodied Energy
27 MJ/kg 11 x 10 3 BTU/lb
Embodied Water
61 L/kg
Embodied Water
61 L/kg 7.2 gal/lb
Registered Designations & Aliases
ASTM A372 Grade M 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 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005 Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015