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N08028 Stainless Steel vs. SAE-AISI 4140 Steel

Both N08028 stainless steel and SAE-AISI 4140 steel are iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 N08028 stainless steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
11 to 26
Fatigue Strength, MPa 220
360 to 650
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 400
410 to 660
Tensile Strength: Ultimate (UTS), MPa 570
690 to 1080
Tensile Strength: Yield (Proof), MPa 240
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 12
43
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
2.4
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.4
1.5
Embodied Energy, MJ/kg 89
20
Embodied Water, L/kg 240
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
920 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
25 to 38
Strength to Weight: Bending, points 19
22 to 30
Thermal Diffusivity, mm2/s 3.2
12
Thermal Shock Resistance, points 12
20 to 32

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 26 to 28
0.8 to 1.1
Copper (Cu), % 0.6 to 1.4
0
Iron (Fe), % 29 to 40.4
96.8 to 97.8
Manganese (Mn), % 0 to 2.5
0.75 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0.15 to 0.25
Nickel (Ni), % 30 to 34
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040