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SAE-AISI 1140 Steel vs. AISI 316LN Stainless Steel

Both SAE-AISI 1140 steel and AISI 316LN stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1140 steel and the bottom bar is AISI 316LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14 to 18
42
Fatigue Strength, MPa 230 to 370
200
Poisson's Ratio 0.29
0.28
Reduction in Area, % 39 to 46
51
Shear Modulus, GPa 72
82
Shear Strength, MPa 370 to 420
410
Tensile Strength: Ultimate (UTS), MPa 600 to 700
590
Tensile Strength: Yield (Proof), MPa 340 to 570
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
940
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
19
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
3.8
Embodied Energy, MJ/kg 18
53
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
200
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 25
21
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 14
4.1
Thermal Shock Resistance, points 18 to 21
13

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.030
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 98.4 to 98.9
62 to 71.9
Manganese (Mn), % 0.7 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
10 to 14
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0.080 to 0.13
0 to 0.030