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SAE-AISI 4340M Steel vs. Nickel 908

SAE-AISI 4340M steel belongs to the iron alloys classification, while nickel 908 belongs to the nickel alloys. They have 44% of their average alloy composition in common. There are 29 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 SAE-AISI 4340M steel and the bottom bar is nickel 908.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 6.0
11
Fatigue Strength, MPa 690
450
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 72
70
Shear Strength, MPa 1360
800
Tensile Strength: Ultimate (UTS), MPa 2340
1340
Tensile Strength: Yield (Proof), MPa 1240
930

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 430
920
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 38
11
Thermal Expansion, µm/m-K 13
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
50
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.9
9.3
Embodied Energy, MJ/kg 26
140
Embodied Water, L/kg 55
170

Common Calculations

PREN (Pitting Resistance) 2.2
4.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
140
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
2340
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 84
45
Strength to Weight: Bending, points 51
33
Thermal Diffusivity, mm2/s 10
2.9
Thermal Shock Resistance, points 70
61

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.3
Boron (B), % 0
0 to 0.012
Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.7 to 1.0
3.8 to 4.5
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 93.3 to 94.8
35.6 to 44.6
Manganese (Mn), % 0.65 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.35 to 0.45
0
Nickel (Ni), % 1.7 to 2.0
47 to 51
Niobium (Nb), % 0
2.7 to 3.3
Phosphorus (P), % 0 to 0.012
0 to 0.015
Silicon (Si), % 1.5 to 1.8
0 to 0.5
Sulfur (S), % 0 to 0.012
0 to 0.0050
Titanium (Ti), % 0
1.2 to 1.8
Vanadium (V), % 0.050 to 0.1
0