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Nickel 908 vs. SAE-AISI A2 Steel

Nickel 908 belongs to the nickel alloys classification, while SAE-AISI A2 steel belongs to the iron alloys. They have 45% of their average alloy composition in common. There are 22 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 nickel 908 and the bottom bar is SAE-AISI A2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 70
74
Tensile Strength: Ultimate (UTS), MPa 1340
710 to 2040

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 11
38
Thermal Expansion, µm/m-K 8.6
11

Otherwise Unclassified Properties

Base Metal Price, % relative 50
5.5
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 9.3
2.7
Embodied Energy, MJ/kg 140
38
Embodied Water, L/kg 170
73

Common Calculations

PREN (Pitting Resistance) 4.2
8.9
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 45
25 to 73
Strength to Weight: Bending, points 33
23 to 46
Thermal Diffusivity, mm2/s 2.9
10
Thermal Shock Resistance, points 61
25 to 71

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0 to 0.012
0
Carbon (C), % 0 to 0.030
1.0 to 1.1
Chromium (Cr), % 3.8 to 4.5
4.8 to 5.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0 to 0.25
Iron (Fe), % 35.6 to 44.6
89.4 to 93.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 47 to 51
0 to 0.3
Niobium (Nb), % 2.7 to 3.3
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 1.2 to 1.8
0
Vanadium (V), % 0
0.15 to 0.5