EN 1.4530 Stainless Steel vs. R30021 Cobalt

EN 1.4530 stainless steel belongs to the iron alloys classification, while R30021 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 1.4530 stainless steel and the bottom bar is R30021 cobalt.

EN 1.4530 (X1CrNiMoAlTi12-9-2) Stainless Steel UNS R30021 Co-Cr-W 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		0.29

Shear Modulus, GPa		76
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		1030 to 1370
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		270
Latent Heat of Fusion, J/g		330

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1350

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

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		11

Otherwise Unclassified Properties

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

Embodied Carbon, kg CO₂/kg material		3.4
Embodied Carbon, kg CO₂/kg material		8.0

Embodied Energy, MJ/kg		46
Embodied Energy, MJ/kg		110

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

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 48
Strength to Weight: Axial, points		23

Strength to Weight: Bending, points		29 to 35
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		35 to 47
Thermal Shock Resistance, points		21

Alloy Composition

Aluminum (Al), %		0.6 to 0.8
Aluminum (Al), %		0

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

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

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

Iron (Fe), %		74.4 to 77.3
Iron (Fe), %		0 to 3.0

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

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

Nickel (Ni), %		8.5 to 9.5
Nickel (Ni), %		2.0 to 3.0

Nitrogen (N), %		0 to 0.010
Nitrogen (N), %		0

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

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

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

Titanium (Ti), %		0.28 to 0.37
Titanium (Ti), %		0