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ASTM Grade HH Steel vs. Grade CX2M Nickel

ASTM grade HH steel belongs to the iron alloys classification, while grade CX2M nickel belongs to the nickel alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. 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 grade HH steel and the bottom bar is grade CX2M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 11
45
Fatigue Strength, MPa 150
260
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
84
Tensile Strength: Ultimate (UTS), MPa 580
550
Tensile Strength: Yield (Proof), MPa 270
310

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1400
1500
Melting Onset (Solidus), °C 1360
1450
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 14
10
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 20
65
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.7
12
Embodied Energy, MJ/kg 53
160
Embodied Water, L/kg 180
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53
210
Resilience: Unit (Modulus of Resilience), kJ/m3 190
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 3.8
2.7
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.020
Chromium (Cr), % 24 to 28
22 to 24
Iron (Fe), % 52.9 to 64.8
0 to 1.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
15 to 16.5
Nickel (Ni), % 11 to 14
56.4 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.020