R30021 Cobalt vs. EN 1.4596 Stainless Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.4596 stainless steel belongs to the iron 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 R30021 cobalt and the bottom bar is EN 1.4596 stainless steel.

UNS R30021 Co-Cr-W Alloy EN 1.4596 (X1CrNiMoAlTi12-10-2) Stainless Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		86
Shear Modulus, GPa		76

Tensile Strength: Ultimate (UTS), MPa		700
Tensile Strength: Ultimate (UTS), MPa		1030 to 1600

Thermal Properties

Latent Heat of Fusion, J/g		330
Latent Heat of Fusion, J/g		280

Melting Completion (Liquidus), °C		1350
Melting Completion (Liquidus), °C		1450

Melting Onset (Solidus), °C		1190
Melting Onset (Solidus), °C		1410

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

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

Otherwise Unclassified Properties

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

Embodied Carbon, kg CO₂/kg material		8.0
Embodied Carbon, kg CO₂/kg material		3.5

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

Embodied Water, L/kg		520
Embodied Water, L/kg		130

Common Calculations

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

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

Strength to Weight: Axial, points		23
Strength to Weight: Axial, points		36 to 56

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		29 to 39

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		35 to 54

Alloy Composition

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

Carbon (C), %		0.2 to 0.35
Carbon (C), %		0 to 0.015

Chromium (Cr), %		26 to 29
Chromium (Cr), %		11.5 to 12.5

Cobalt (Co), %		61.7 to 67.3
Cobalt (Co), %		0

Iron (Fe), %		0 to 3.0
Iron (Fe), %		73.4 to 76.4

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

Molybdenum (Mo), %		4.5 to 6.0
Molybdenum (Mo), %		1.9 to 2.2

Nickel (Ni), %		2.0 to 3.0
Nickel (Ni), %		9.2 to 10.2

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

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

Silicon (Si), %		0 to 1.5
Silicon (Si), %		0 to 0.1

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

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