S21904 Stainless Steel vs. 60Cr-40Ni Alloy

S21904 stainless steel belongs to the iron alloys classification, while 60Cr-40Ni alloy belongs to the otherwise unclassified metals. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is 60Cr-40Ni alloy.

UNS S21904 (XM-11) Stainless Steel 60Cr-40Ni (R20600) Casting Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.28
Poisson's Ratio		0.25

Shear Modulus, GPa		78
Shear Modulus, GPa		87

Tensile Strength: Ultimate (UTS), MPa		700 to 1000
Tensile Strength: Ultimate (UTS), MPa		870

Tensile Strength: Yield (Proof), MPa		390 to 910
Tensile Strength: Yield (Proof), MPa		660

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		370

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		490

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		16

Otherwise Unclassified Properties

Base Metal Price, % relative		15
Base Metal Price, % relative		49

Density, g/cm³		7.7
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		3.0
Embodied Carbon, kg CO₂/kg material		7.4

Embodied Energy, MJ/kg		43
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		160
Embodied Water, L/kg		380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		380 to 2070
Resilience: Unit (Modulus of Resilience), kJ/m³		1000

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		16

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		26

Strength to Weight: Axial, points		25 to 36
Strength to Weight: Axial, points		31

Strength to Weight: Bending, points		23 to 29
Strength to Weight: Bending, points		26

Thermal Shock Resistance, points		15 to 21
Thermal Shock Resistance, points		18

Alloy Composition

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

Carbon (C), %		0 to 0.040
Carbon (C), %		0 to 0.1

Chromium (Cr), %		19 to 21.5
Chromium (Cr), %		58 to 62

Iron (Fe), %		59.5 to 67.4
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		8.0 to 10
Manganese (Mn), %		0 to 0.3

Nickel (Ni), %		5.5 to 7.5
Nickel (Ni), %		34.5 to 42

Nitrogen (N), %		0.15 to 0.4
Nitrogen (N), %		0 to 0.3

Phosphorus (P), %		0 to 0.045
Phosphorus (P), %		0 to 0.020

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

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020

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