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SAE-AISI H21 Steel vs. Grade CW6MC Nickel

SAE-AISI H21 steel belongs to the iron alloys classification, while grade CW6MC nickel belongs to the nickel alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is grade CW6MC nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
540

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Melting Completion (Liquidus), °C 1630
1480
Melting Onset (Solidus), °C 1580
1430
Specific Heat Capacity, J/kg-K 440
440
Thermal Conductivity, W/m-K 27
11
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 23
80
Density, g/cm3 8.5
8.6
Embodied Carbon, kg CO2/kg material 4.5
14
Embodied Energy, MJ/kg 68
200
Embodied Water, L/kg 72
290

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 23 to 58
18
Strength to Weight: Bending, points 21 to 38
17
Thermal Diffusivity, mm2/s 7.1
2.8
Thermal Shock Resistance, points 24 to 59
15

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.060
Chromium (Cr), % 3.0 to 3.8
20 to 23
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.6 to 93.8
0 to 5.0
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 0 to 0.3
55.4 to 68.9
Niobium (Nb), % 0
3.2 to 4.5
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.15 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0