AISI 420 Stainless Steel vs. AISI 310 Stainless Steel
Both AISI 420 stainless steel and AISI 310 stainless steel are iron alloys. They have 67% of their average alloy composition in common.
For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is AISI 310 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 | |
| 180 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 8.0 to 15 | |
| 34 to 45 |
| Fatigue Strength, MPa | 220 to 670 | |
| 240 to 280 |
| Poisson's Ratio | 0.28 | |
| 0.27 |
| Rockwell B Hardness | 84 | |
| 82 |
| Shear Modulus, GPa | 76 | |
| 78 |
| Shear Strength, MPa | 420 to 1010 | |
| 420 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1720 | |
| 600 to 710 |
| Tensile Strength: Yield (Proof), MPa | 380 to 1310 | |
| 260 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 310 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 440 |
| Maximum Temperature: Mechanical, °C | 620 | |
| 1040 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1450 |
| Melting Onset (Solidus), °C | 1450 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 27 | |
| 15 |
| Thermal Expansion, µm/m-K | 10 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.0 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.5 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 25 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 4.3 |
| Embodied Energy, MJ/kg | 28 | |
| 61 |
| Embodied Water, L/kg | 100 | |
| 190 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 130 | |
| 200 to 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 4410 | |
| 170 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 62 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 22 to 41 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 7.3 | |
| 3.9 |
| Thermal Shock Resistance, points | 25 to 62 | |
| 14 to 17 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.4 | |
| 0 to 0.25 |
| Chromium (Cr), % | 12 to 14 | |
| 24 to 26 |
| Iron (Fe), % | 82.3 to 87.9 | |
| 48.2 to 57 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 to 0.75 | |
| 19 to 22 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |