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EN 1.7701 +A Steel vs. Annealed R30035 Cobalt

EN 1.7701 +A steel belongs to the iron alloys classification, while annealed R30035 cobalt belongs to the cobalt alloys. There are 28 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 EN 1.7701 +A steel and the bottom bar is annealed R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 20
46
Fatigue Strength, MPa 300
170
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
84
Tensile Strength: Ultimate (UTS), MPa 710
900
Tensile Strength: Yield (Proof), MPa 440
300

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1320
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 44
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
100
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 1.9
10
Embodied Energy, MJ/kg 26
140
Embodied Water, L/kg 52
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
320
Resilience: Unit (Modulus of Resilience), kJ/m3 510
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 25
29
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 12
3.0
Thermal Shock Resistance, points 21
23

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.48 to 0.56
0 to 0.025
Chromium (Cr), % 0.9 to 1.2
19 to 21
Cobalt (Co), % 0
29.1 to 39
Iron (Fe), % 96.2 to 97.7
0 to 1.0
Manganese (Mn), % 0.7 to 1.1
0 to 0.15
Molybdenum (Mo), % 0.15 to 0.3
9.0 to 10.5
Nickel (Ni), % 0
33 to 37
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.4
0 to 0.15
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Vanadium (V), % 0.1 to 0.2
0