AISI 304 Stainless Steel vs. SAE-AISI 8630 Steel
Both AISI 304 stainless steel and SAE-AISI 8630 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is SAE-AISI 8630 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 360 | |
| 160 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 8.0 to 43 | |
| 12 to 24 |
| Fatigue Strength, MPa | 210 to 440 | |
| 260 to 350 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 400 to 690 | |
| 340 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 1180 | |
| 540 to 680 |
| Tensile Strength: Yield (Proof), MPa | 230 to 860 | |
| 360 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 710 | |
| 410 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 39 |
| Thermal Expansion, µm/m-K | 17 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 2.6 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 1.5 |
| Embodied Energy, MJ/kg | 43 | |
| 20 |
| Embodied Water, L/kg | 150 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 86 to 250 | |
| 78 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 1870 | |
| 340 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 42 | |
| 19 to 24 |
| Strength to Weight: Bending, points | 20 to 32 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 4.2 | |
| 10 |
| Thermal Shock Resistance, points | 12 to 25 | |
| 18 to 23 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0.28 to 0.33 |
| Chromium (Cr), % | 18 to 20 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 66.5 to 74 | |
| 96.8 to 97.9 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.7 to 0.9 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 8.0 to 10.5 | |
| 0.4 to 0.7 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.75 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |