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SAE-AISI 1040 Steel vs. S82012 Stainless Steel

Both SAE-AISI 1040 steel and S82012 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 30 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 1040 steel and the bottom bar is S82012 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 20
40
Fatigue Strength, MPa 220 to 340
480
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 350 to 390
550
Tensile Strength: Ultimate (UTS), MPa 570 to 640
800
Tensile Strength: Yield (Proof), MPa 320 to 530
560

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
950
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.4
Embodied Energy, MJ/kg 18
35
Embodied Water, L/kg 46
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 96
290
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 23
29
Strength to Weight: Bending, points 19 to 21
25
Thermal Diffusivity, mm2/s 14
3.9
Thermal Shock Resistance, points 18 to 20
23

Alloy Composition

Carbon (C), % 0.37 to 0.44
0 to 0.050
Chromium (Cr), % 0
19 to 20.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 98.6 to 99.03
71.3 to 77.9
Manganese (Mn), % 0.6 to 0.9
2.0 to 4.0
Molybdenum (Mo), % 0
0.1 to 0.6
Nickel (Ni), % 0
0.8 to 1.5
Nitrogen (N), % 0
0.16 to 0.26
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0 to 0.050
0 to 0.0050