MakeItFrom.com
Menu (ESC)

G-CoCr28 Cobalt vs. AISI 303 Stainless Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while AISI 303 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 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 6.7
40 to 51
Fatigue Strength, MPa 130
230 to 360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 83
77
Tensile Strength: Ultimate (UTS), MPa 560
600 to 690
Tensile Strength: Yield (Proof), MPa 260
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 1200
930
Melting Completion (Liquidus), °C 1330
1450
Melting Onset (Solidus), °C 1270
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
16
Thermal Expansion, µm/m-K 14
17

Otherwise Unclassified Properties

Base Metal Price, % relative 100
15
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.2
3.0
Embodied Energy, MJ/kg 84
42
Embodied Water, L/kg 440
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
240
Resilience: Unit (Modulus of Resilience), kJ/m3 160
140 to 440
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
21 to 25
Strength to Weight: Bending, points 19
20 to 22
Thermal Diffusivity, mm2/s 2.2
4.4
Thermal Shock Resistance, points 14
13 to 15

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.15
Chromium (Cr), % 27 to 30
17 to 19
Cobalt (Co), % 48 to 52
0
Iron (Fe), % 9.7 to 24.5
67.3 to 74.9
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
8.0 to 10
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.2
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35