MakeItFrom.com
Menu (ESC)

R30075 Cobalt vs. SAE-AISI D4 Steel

R30075 cobalt belongs to the cobalt alloys classification, while SAE-AISI D4 steel belongs to the iron alloys. There are 26 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 R30075 cobalt and the bottom bar is SAE-AISI D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
8.4 to 15
Fatigue Strength, MPa 250 to 840
310 to 920
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 82 to 98
74
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
760 to 2060
Tensile Strength: Yield (Proof), MPa 480 to 840
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
31
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
5.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.1
3.3
Embodied Energy, MJ/kg 110
49
Embodied Water, L/kg 530
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
100 to 160
Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
27 to 75
Strength to Weight: Bending, points 22 to 31
24 to 47
Thermal Diffusivity, mm2/s 3.5
8.3
Thermal Shock Resistance, points 21 to 29
23 to 63

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
2.1 to 2.4
Chromium (Cr), % 27 to 30
11 to 13
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.75
80.6 to 86.3
Manganese (Mn), % 0 to 1.0
0 to 0.6
Molybdenum (Mo), % 5.0 to 7.0
0.7 to 1.2
Nickel (Ni), % 0 to 0.5
0 to 0.3
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Vanadium (V), % 0
0 to 1.0

Comparable Variants