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SAE-AISI 1080 Steel vs. S31727 Stainless Steel

Both SAE-AISI 1080 steel and S31727 stainless steel are iron alloys. They have 58% of their average alloy composition in common. There are 28 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 SAE-AISI 1080 steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 260
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
40
Fatigue Strength, MPa 300 to 360
240
Poisson's Ratio 0.29
0.28
Reduction in Area, % 28 to 45
56
Shear Modulus, GPa 72
78
Shear Strength, MPa 460 to 520
430
Tensile Strength: Ultimate (UTS), MPa 770 to 870
630
Tensile Strength: Yield (Proof), MPa 480 to 590
270

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1010
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
4.7
Embodied Energy, MJ/kg 19
64
Embodied Water, L/kg 46
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 84
200
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 920
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 31
22
Strength to Weight: Bending, points 24 to 26
20
Thermal Shock Resistance, points 25 to 29
14

Alloy Composition

Carbon (C), % 0.75 to 0.88
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 98.1 to 98.7
53.7 to 61.3
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030