MakeItFrom.com
Menu (ESC)

G-CoCr28 Cobalt vs. EN 1.3975 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.3975 stainless steel belongs to the iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is EN 1.3975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 6.7
27
Fatigue Strength, MPa 130
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
76
Tensile Strength: Ultimate (UTS), MPa 560
660
Tensile Strength: Yield (Proof), MPa 260
320

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 1200
910
Melting Completion (Liquidus), °C 1330
1360
Melting Onset (Solidus), °C 1270
1320
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 100
15
Density, g/cm3 8.1
7.5
Embodied Carbon, kg CO2/kg material 6.2
3.3
Embodied Energy, MJ/kg 84
47
Embodied Water, L/kg 440
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
270
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Shock Resistance, points 14
15

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.050
Chromium (Cr), % 27 to 30
16 to 18
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
58.2 to 65.4
Manganese (Mn), % 0 to 1.5
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 4.0
8.0 to 9.0
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0.5 to 1.5
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030