EN 1.4596 Stainless Steel vs. R31538 Cobalt

EN 1.4596 stainless steel belongs to the iron alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is EN 1.4596 stainless steel and the bottom bar is R31538 cobalt.

EN 1.4596 (X1CrNiMoAlTi12-10-2) Stainless Steel High Carbon Co-28Cr-6Mo Alloy (ASTM F1537 Alloy 2, ISO 5832-12 Alloy 2, R31538)

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		0.29

Shear Modulus, GPa		76
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		1030 to 1600
Tensile Strength: Ultimate (UTS), MPa		1020 to 1360

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1450
Melting Completion (Liquidus), °C		1360

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		1290

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Density, g/cm³		7.9
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		3.5
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		48
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		130
Embodied Water, L/kg		530

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		36 to 56
Strength to Weight: Axial, points		34 to 45

Strength to Weight: Bending, points		29 to 39
Strength to Weight: Bending, points		27 to 32

Thermal Shock Resistance, points		35 to 54
Thermal Shock Resistance, points		25 to 33

Alloy Composition

Aluminum (Al), %		0.8 to 1.1
Aluminum (Al), %		0

Carbon (C), %		0 to 0.015
Carbon (C), %		0.15 to 0.35

Chromium (Cr), %		11.5 to 12.5
Chromium (Cr), %		26 to 30

Cobalt (Co), %		0
Cobalt (Co), %		58.7 to 68.9

Iron (Fe), %		73.4 to 76.4
Iron (Fe), %		0 to 0.75

Manganese (Mn), %		0 to 0.1
Manganese (Mn), %		0 to 1.0

Molybdenum (Mo), %		1.9 to 2.2
Molybdenum (Mo), %		5.0 to 7.0

Nickel (Ni), %		9.2 to 10.2
Nickel (Ni), %		0 to 1.0

Nitrogen (N), %		0 to 0.020
Nitrogen (N), %		0 to 0.25

Phosphorus (P), %		0 to 0.010
Phosphorus (P), %		0

Silicon (Si), %		0 to 0.1
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.0050
Sulfur (S), %		0

Titanium (Ti), %		0.28 to 0.4
Titanium (Ti), %		0