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ACI-ASTM CK20 Steel vs. Grade CW6M Nickel

ACI-ASTM CK20 steel belongs to the iron alloys classification, while grade CW6M nickel belongs to the nickel alloys. They have 42% of their average alloy composition in common. There are 25 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 ACI-ASTM CK20 steel and the bottom bar is grade CW6M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 37
29
Fatigue Strength, MPa 220
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
84
Tensile Strength: Ultimate (UTS), MPa 530
560
Tensile Strength: Yield (Proof), MPa 260
310

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
970
Melting Completion (Liquidus), °C 1400
1530
Melting Onset (Solidus), °C 1430
1470
Specific Heat Capacity, J/kg-K 480
430
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
65
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 4.4
13
Embodied Energy, MJ/kg 62
170
Embodied Water, L/kg 190
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
140
Resilience: Unit (Modulus of Resilience), kJ/m3 170
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
17
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.070
Chromium (Cr), % 23 to 27
17 to 20
Iron (Fe), % 46.7 to 58
0 to 3.0
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
17 to 20
Nickel (Ni), % 19 to 22
54.9 to 66
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030