ASTM A387 Grade 21 Steel vs. 60Cr-40Ni Alloy

ASTM A387 grade 21 steel belongs to the iron alloys classification, while 60Cr-40Ni alloy belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is 60Cr-40Ni alloy.

ASTM A387 Grade 21 (K31545) 3Cr-1Mo Steel 60Cr-40Ni (R20600) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.29
Poisson's Ratio		0.25

Shear Modulus, GPa		74
Shear Modulus, GPa		87

Tensile Strength: Ultimate (UTS), MPa		500 to 590
Tensile Strength: Ultimate (UTS), MPa		870

Tensile Strength: Yield (Proof), MPa		230 to 350
Tensile Strength: Yield (Proof), MPa		660

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		370

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		490

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		16

Otherwise Unclassified Properties

Base Metal Price, % relative		4.1
Base Metal Price, % relative		49

Density, g/cm³		7.9
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		1.8
Embodied Carbon, kg CO₂/kg material		7.4

Embodied Energy, MJ/kg		23
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		62
Embodied Water, L/kg		380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		140 to 320
Resilience: Unit (Modulus of Resilience), kJ/m³		1000

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		16

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		26

Strength to Weight: Axial, points		18 to 21
Strength to Weight: Axial, points		31

Strength to Weight: Bending, points		18 to 20
Strength to Weight: Bending, points		26

Thermal Shock Resistance, points		14 to 17
Thermal Shock Resistance, points		18

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.25

Carbon (C), %		0.050 to 0.15
Carbon (C), %		0 to 0.1

Chromium (Cr), %		2.8 to 3.3
Chromium (Cr), %		58 to 62

Iron (Fe), %		94.4 to 96
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		0.3 to 0.6
Manganese (Mn), %		0 to 0.3

Molybdenum (Mo), %		0.9 to 1.1
Molybdenum (Mo), %		0

Nickel (Ni), %		0
Nickel (Ni), %		34.5 to 42

Nitrogen (N), %		0
Nitrogen (N), %		0 to 0.3

Phosphorus (P), %		0 to 0.025
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0 to 0.5
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.025
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.5