SAE-AISI 1108 Steel vs. S21603 Stainless Steel
Both SAE-AISI 1108 steel and S21603 stainless steel are iron alloys. They have 63% 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 1108 steel and the bottom bar is S21603 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 110 to 140 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 23 to 34 | |
| 45 |
| Fatigue Strength, MPa | 170 to 260 | |
| 360 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 45 to 57 | |
| 57 |
| Shear Modulus, GPa | 73 | |
| 79 |
| Shear Strength, MPa | 250 to 280 | |
| 490 |
| Tensile Strength: Ultimate (UTS), MPa | 380 to 440 | |
| 690 |
| Tensile Strength: Yield (Proof), MPa | 220 to 360 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 990 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 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 | 7.9 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 3.6 |
| Embodied Energy, MJ/kg | 18 | |
| 50 |
| Embodied Water, L/kg | 46 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 95 to 110 | |
| 270 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 340 | |
| 380 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 13 to 16 | |
| 25 |
| Strength to Weight: Bending, points | 15 to 16 | |
| 22 |
| Thermal Shock Resistance, points | 12 to 14 | |
| 15 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.13 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 17.5 to 22 |
| Iron (Fe), % | 98.9 to 99.24 | |
| 57.6 to 67.8 |
| Manganese (Mn), % | 0.6 to 0.8 | |
| 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), % | 0.080 to 0.13 | |
| 0 to 0.030 |