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SAE-AISI 4340 Steel vs. N06650 Nickel

SAE-AISI 4340 steel belongs to the iron alloys classification, while N06650 nickel belongs to the nickel alloys. There are 26 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 SAE-AISI 4340 steel and the bottom bar is N06650 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 12 to 22
50
Fatigue Strength, MPa 330 to 740
420
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
82
Shear Strength, MPa 430 to 770
640
Tensile Strength: Ultimate (UTS), MPa 690 to 1280
900
Tensile Strength: Yield (Proof), MPa 470 to 1150
460

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 430
980
Melting Completion (Liquidus), °C 1460
1500
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
440
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
60
Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 1.7
10
Embodied Energy, MJ/kg 22
140
Embodied Water, L/kg 53
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 170
380
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 3490
490
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 24 to 45
29
Strength to Weight: Bending, points 22 to 33
24
Thermal Shock Resistance, points 20 to 38
24

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.5
Carbon (C), % 0.38 to 0.43
0 to 0.030
Chromium (Cr), % 0.7 to 0.9
19 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 95.1 to 96.3
12 to 16
Manganese (Mn), % 0.6 to 0.8
0 to 0.5
Molybdenum (Mo), % 0.2 to 0.3
9.5 to 12.5
Nickel (Ni), % 1.7 to 2.0
44.4 to 58.9
Niobium (Nb), % 0
0.050 to 0.5
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.010
Tungsten (W), % 0
0.5 to 2.5