EN 1.5515 Steel vs. R30008 Cobalt

EN 1.5515 steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.5515 steel and the bottom bar is R30008 cobalt.

EN 1.5515 (38B2) Boron Steel UNS R30008 (ASTM F1058 Grade 2) Cobalt

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		210

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		72
Shear Modulus, GPa		83

Tensile Strength: Ultimate (UTS), MPa		490 to 1760
Tensile Strength: Ultimate (UTS), MPa		950 to 1700

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		320

Melting Completion (Liquidus), °C		1460
Melting Completion (Liquidus), °C		1400

Melting Onset (Solidus), °C		1420
Melting Onset (Solidus), °C		1330

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

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

Otherwise Unclassified Properties

Base Metal Price, % relative		1.9
Base Metal Price, % relative		95

Density, g/cm³		7.8
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		1.4
Embodied Carbon, kg CO₂/kg material		8.1

Embodied Energy, MJ/kg		19
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		47
Embodied Water, L/kg		400

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

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

Strength to Weight: Axial, points		17 to 63
Strength to Weight: Axial, points		31 to 56

Strength to Weight: Bending, points		18 to 41
Strength to Weight: Bending, points		25 to 37

Thermal Shock Resistance, points		14 to 52
Thermal Shock Resistance, points		25 to 44

Alloy Composition

Boron (B), %		0.00080 to 0.0050
Boron (B), %		0 to 0.0010

Carbon (C), %		0.35 to 0.4
Carbon (C), %		0 to 0.15

Chromium (Cr), %		0 to 0.3
Chromium (Cr), %		18.5 to 21.5

Cobalt (Co), %		0
Cobalt (Co), %		39 to 42

Copper (Cu), %		0 to 0.25
Copper (Cu), %		0

Iron (Fe), %		97.8 to 98.9
Iron (Fe), %		7.6 to 20

Manganese (Mn), %		0.6 to 0.9
Manganese (Mn), %		1.0 to 2.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		6.5 to 7.5

Nickel (Ni), %		0
Nickel (Ni), %		15 to 18

Phosphorus (P), %		0 to 0.025
Phosphorus (P), %		0 to 0.015

Silicon (Si), %		0.15 to 0.3
Silicon (Si), %		0 to 1.2

Sulfur (S), %		0 to 0.025
Sulfur (S), %		0 to 0.015