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ASTM Grade HI Steel vs. Grade CW12MW Nickel

ASTM grade HI steel belongs to the iron alloys classification, while grade CW12MW nickel belongs to the nickel alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. 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 ASTM grade HI steel and the bottom bar is grade CW12MW nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 11
4.6
Fatigue Strength, MPa 150
130
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
85
Tensile Strength: Ultimate (UTS), MPa 550
560
Tensile Strength: Yield (Proof), MPa 270
310

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Mechanical, °C 1100
960
Melting Completion (Liquidus), °C 1400
1610
Melting Onset (Solidus), °C 1350
1560
Specific Heat Capacity, J/kg-K 490
410
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 23
70
Density, g/cm3 7.8
9.1
Embodied Carbon, kg CO2/kg material 4.1
13
Embodied Energy, MJ/kg 59
180
Embodied Water, L/kg 200
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
22
Resilience: Unit (Modulus of Resilience), kJ/m3 180
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 20
17
Strength to Weight: Bending, points 19
17
Thermal Shock Resistance, points 12
16

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.12
Chromium (Cr), % 26 to 30
15.5 to 17.5
Iron (Fe), % 46.9 to 59.8
4.5 to 7.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
16 to 18
Nickel (Ni), % 14 to 18
49.2 to 60.1
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
Tungsten (W), % 0
3.8 to 5.3
Vanadium (V), % 0
0.2 to 0.4