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ASTM A369 Grade FP91 vs. EN 2.4964 Cobalt

ASTM A369 grade FP91 belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. There are 27 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 ASTM A369 grade FP91 and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 19
40
Fatigue Strength, MPa 320
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 670
960
Tensile Strength: Yield (Proof), MPa 460
390

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1460
1630
Melting Onset (Solidus), °C 1420
1550
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
9.6
Embodied Carbon, kg CO2/kg material 2.6
9.8
Embodied Energy, MJ/kg 37
140
Embodied Water, L/kg 88
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
310
Resilience: Unit (Modulus of Resilience), kJ/m3 560
340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 24
28
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 6.9
3.9
Thermal Shock Resistance, points 18
25

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0.050 to 0.15
Chromium (Cr), % 8.0 to 9.5
19 to 21
Cobalt (Co), % 0
46.4 to 58
Iron (Fe), % 87.3 to 90.3
0 to 3.0
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
9.0 to 11
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0.2 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.015
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0