ASTM A372 Grade K Alloy Steel
Alloy Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength780MPa
Yield Strength620MPa
Brinell Hardness230HB
Maximum Service Temperature440°C
Chemical Composition
C
0 to 0.18%
CR
1.0 to 1.8%
NI
2.0 to 3.3%
MO
0.2 to 0.6%
MN
0.1 to 0.4%
SI
0.15 to 0.35%
P
0 to 0.015%
S
0 to 0.010%
FE
93.4 to 96.6%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
23 %
Fatigue Strength
440 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
490 MPa
Tensile Strength: Ultimate (UTS)
780 MPa
Tensile Strength: Yield (Proof)
620 MPa
Hardness
Brinell Hardness
230
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
440 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
48 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
23 points
Electrical
Electrical Conductivity: Equal Volume
7.8 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.9 % IACS
Calculated
PREN (Pitting Resistance)
2.7
Resilience: Ultimate (Unit Rupture Work)
160 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1010 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
4.4 % relative
Embodied Carbon
1.8 kg CO 2 /kg material
Embodied Energy
24 MJ/kg
Embodied Energy
24 MJ/kg 10 x 10 3 BTU/lb
Embodied Water
57 L/kg
Embodied Water
57 L/kg 6.8 gal/lb
Registered Designations & Aliases
ASTM A372 Grade K 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