ASTM A387 Grade 2 Class 2 Steel
Alloy Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength550MPa
Yield Strength350MPa
Brinell Hardness170HB
Maximum Service Temperature420°C
Chemical Composition
C
0.050 to 0.21%
CR
0.5 to 0.8%
MO
0.45 to 0.6%
MN
0.55 to 0.8%
SI
0.15 to 0.4%
P
0 to 0.025%
S
0 to 0.025%
FE
97.1 to 98.3%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
25 %
Fatigue Strength
250 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
350 MPa
Tensile Strength: Ultimate (UTS)
550 MPa
Tensile Strength: Yield (Proof)
350 MPa
Hardness
Brinell Hardness
170
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
420 °C
Melting Completion (Liquidus)
1470 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
45 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
16 points
Electrical
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Calculated
PREN (Pitting Resistance)
2.4
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
320 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Environmental
Base Metal Price
2.6 % relative
Embodied Carbon
1.6 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.8 x 10 3 BTU/lb
Embodied Water
50 L/kg
Embodied Water
50 L/kg 6.0 gal/lb
Registered Designations & Aliases
ASTM A387 Grade 2 Class 2 Steel
Standards
ASTM A387 ASTM A387: Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
ASTM A387 ASTM A387: Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011