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Grade CW2M Nickel vs. Grade CW6M Nickel

Both grade CW2M nickel and grade CW6M nickel are nickel alloys. Both are furnished in the heat treated (HT) condition. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is grade CW2M nickel and the bottom bar is grade CW6M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 23
29
Fatigue Strength, MPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
84
Tensile Strength: Ultimate (UTS), MPa 560
560
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 330
330
Maximum Temperature: Mechanical, °C 960
970
Melting Completion (Liquidus), °C 1520
1530
Melting Onset (Solidus), °C 1460
1470
Specific Heat Capacity, J/kg-K 430
430
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
65
Density, g/cm3 8.8
8.8
Embodied Carbon, kg CO2/kg material 12
13
Embodied Energy, MJ/kg 170
170
Embodied Water, L/kg 290
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 220
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 18
18
Strength to Weight: Bending, points 17
17
Thermal Shock Resistance, points 16
16

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.070
Chromium (Cr), % 15 to 17.5
17 to 20
Iron (Fe), % 0 to 2.0
0 to 3.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 15 to 17.5
17 to 20
Nickel (Ni), % 60.1 to 70
54.9 to 66
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0 to 1.0
0