Nickel 908 vs. SAE-AISI A8 Steel

Nickel 908 belongs to the nickel alloys classification, while SAE-AISI A8 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 A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.3
Poisson's Ratio		0.29

Shear Modulus, GPa		70
Shear Modulus, GPa		74

Tensile Strength: Ultimate (UTS), MPa		1340
Tensile Strength: Ultimate (UTS), MPa		700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1430
Melting Completion (Liquidus), °C		1480

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1430

Specific Heat Capacity, J/kg-K		460
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		11
Thermal Conductivity, W/m-K		37

Thermal Expansion, µm/m-K		8.6
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		50
Base Metal Price, % relative		8.5

Density, g/cm³		8.3
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		9.3
Embodied Carbon, kg CO₂/kg material		2.3

Embodied Energy, MJ/kg		140
Embodied Energy, MJ/kg		31

Embodied Water, L/kg		170
Embodied Water, L/kg		73

Common Calculations

PREN (Pitting Resistance)		4.2
PREN (Pitting Resistance)		12

Stiffness to Weight: Axial, points		12
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		45
Strength to Weight: Axial, points		25 to 68

Strength to Weight: Bending, points		33
Strength to Weight: Bending, points		22 to 44

Thermal Diffusivity, mm²/s		2.9
Thermal Diffusivity, mm²/s		9.9

Thermal Shock Resistance, points		61
Thermal Shock Resistance, points		22 to 62

Alloy Composition

Aluminum (Al), %		0.75 to 1.3
Aluminum (Al), %		0

Boron (B), %		0 to 0.012
Boron (B), %		0

Carbon (C), %		0 to 0.030
Carbon (C), %		0.5 to 0.6

Chromium (Cr), %		3.8 to 4.5
Chromium (Cr), %		4.8 to 5.5

Cobalt (Co), %		0 to 0.5
Cobalt (Co), %		0

Copper (Cu), %		0 to 0.5
Copper (Cu), %		0 to 0.25

Iron (Fe), %		35.6 to 44.6
Iron (Fe), %		88.5 to 91.9

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0 to 0.5

Molybdenum (Mo), %		0
Molybdenum (Mo), %		1.2 to 1.7

Nickel (Ni), %		47 to 51
Nickel (Ni), %		0 to 0.3

Niobium (Nb), %		2.7 to 3.3
Niobium (Nb), %		0

Phosphorus (P), %		0 to 0.015
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 0.5
Silicon (Si), %		0.75 to 1.1

Sulfur (S), %		0 to 0.0050
Sulfur (S), %		0 to 0.030

Titanium (Ti), %		1.2 to 1.8
Titanium (Ti), %		0

Tungsten (W), %		0
Tungsten (W), %		1.0 to 1.5