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SAE-AISI 1090 Steel vs. S21603 Stainless Steel

Both SAE-AISI 1090 steel and S21603 stainless steel are iron alloys. They have 64% 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 1090 steel and the bottom bar is S21603 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 280
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
45
Fatigue Strength, MPa 320 to 380
360
Poisson's Ratio 0.29
0.28
Reduction in Area, % 28 to 45
57
Shear Modulus, GPa 72
79
Shear Strength, MPa 470 to 570
490
Tensile Strength: Ultimate (UTS), MPa 790 to 950
690
Tensile Strength: Yield (Proof), MPa 520 to 610
390

Thermal Properties

Latent Heat of Fusion, J/g 240
290
Maximum Temperature: Mechanical, °C 400
990
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
3.6
Embodied Energy, MJ/kg 19
50
Embodied Water, L/kg 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 91
270
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1000
380
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 34
25
Strength to Weight: Bending, points 24 to 27
22
Thermal Shock Resistance, points 25 to 31
15

Alloy Composition

Carbon (C), % 0.85 to 1.0
0 to 0.030
Chromium (Cr), % 0
17.5 to 22
Iron (Fe), % 98 to 98.6
57.6 to 67.8
Manganese (Mn), % 0.6 to 0.9
7.5 to 9.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030