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N08135 Stainless Steel vs. SAE-AISI 4340 Steel

Both N08135 stainless steel and SAE-AISI 4340 steel are iron alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is N08135 stainless steel and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 46
12 to 22
Fatigue Strength, MPa 220
330 to 740
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 400
430 to 770
Tensile Strength: Ultimate (UTS), MPa 570
690 to 1280
Tensile Strength: Yield (Proof), MPa 240
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
430
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 39
3.5
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 6.8
1.7
Embodied Energy, MJ/kg 94
22
Embodied Water, L/kg 220
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 140
590 to 3490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
24 to 45
Strength to Weight: Bending, points 19
22 to 33
Thermal Shock Resistance, points 13
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 20.5 to 23.5
0.7 to 0.9
Copper (Cu), % 0 to 0.7
0
Iron (Fe), % 30.2 to 42.3
95.1 to 96.3
Manganese (Mn), % 0 to 1.0
0.6 to 0.8
Molybdenum (Mo), % 4.0 to 5.0
0.2 to 0.3
Nickel (Ni), % 33 to 38
1.7 to 2.0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 0.2 to 0.8
0