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EN 1.4525 Stainless Steel vs. G-CoCr28 Cobalt

EN 1.4525 stainless steel belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4525 stainless steel and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 5.6 to 13
6.7
Fatigue Strength, MPa 480 to 540
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
83
Tensile Strength: Ultimate (UTS), MPa 1030 to 1250
560
Tensile Strength: Yield (Proof), MPa 840 to 1120
260

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Maximum Temperature: Mechanical, °C 860
1200
Melting Completion (Liquidus), °C 1430
1330
Melting Onset (Solidus), °C 1390
1270
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 18
8.5
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Base Metal Price, % relative 13
100
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.8
6.2
Embodied Energy, MJ/kg 39
84
Embodied Water, L/kg 130
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 130
31
Resilience: Unit (Modulus of Resilience), kJ/m3 1820 to 3230
160
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 36 to 45
19
Strength to Weight: Bending, points 29 to 33
19
Thermal Diffusivity, mm2/s 4.7
2.2
Thermal Shock Resistance, points 34 to 41
14

Alloy Composition

Carbon (C), % 0 to 0.070
0.050 to 0.25
Chromium (Cr), % 15 to 17
27 to 30
Cobalt (Co), % 0
48 to 52
Copper (Cu), % 2.5 to 4.0
0
Iron (Fe), % 70.4 to 79
9.7 to 24.5
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.8
0 to 0.5
Nickel (Ni), % 3.5 to 5.5
0 to 4.0
Niobium (Nb), % 0 to 0.35
0 to 0.5
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
0.5 to 1.5
Sulfur (S), % 0 to 0.025
0 to 0.030