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Grade CX2M Nickel vs. ASTM A231 Spring Steel

Grade CX2M nickel belongs to the nickel alloys classification, while ASTM A231 spring steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade CX2M nickel and the bottom bar is ASTM A231 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 45
14
Fatigue Strength, MPa 260
1000
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 84
73
Tensile Strength: Ultimate (UTS), MPa 550
1790
Tensile Strength: Yield (Proof), MPa 310
1570

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 990
420
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 10
52
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 65
2.3
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 12
2.0
Embodied Energy, MJ/kg 160
28
Embodied Water, L/kg 310
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 18
64
Strength to Weight: Bending, points 17
42
Thermal Diffusivity, mm2/s 2.7
14
Thermal Shock Resistance, points 15
53

Alloy Composition

Carbon (C), % 0 to 0.020
0.48 to 0.53
Chromium (Cr), % 22 to 24
0.8 to 1.1
Iron (Fe), % 0 to 1.5
96.7 to 97.7
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 15 to 16.5
0
Nickel (Ni), % 56.4 to 63
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040
Vanadium (V), % 0
0.15 to 0.3