AISI 420 Stainless Steel vs. AISI 403 Stainless Steel
Both AISI 420 stainless steel and AISI 403 stainless steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is AISI 403 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 | |
| 190 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 8.0 to 15 | |
| 16 to 25 |
| Fatigue Strength, MPa | 220 to 670 | |
| 200 to 340 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Rockwell B Hardness | 84 | |
| 83 |
| Shear Modulus, GPa | 76 | |
| 76 |
| Shear Strength, MPa | 420 to 1010 | |
| 340 to 480 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1720 | |
| 530 to 780 |
| Tensile Strength: Yield (Proof), MPa | 380 to 1310 | |
| 280 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 620 | |
| 740 |
| 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 | |
| 28 |
| Thermal Expansion, µm/m-K | 10 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.0 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.5 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 6.5 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 1.9 |
| Embodied Energy, MJ/kg | 28 | |
| 27 |
| Embodied Water, L/kg | 100 | |
| 99 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 130 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 4410 | |
| 210 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 62 | |
| 19 to 28 |
| Strength to Weight: Bending, points | 22 to 41 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 7.3 | |
| 7.6 |
| Thermal Shock Resistance, points | 25 to 62 | |
| 20 to 29 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.4 | |
| 0 to 0.15 |
| Chromium (Cr), % | 12 to 14 | |
| 11.5 to 13 |
| Iron (Fe), % | 82.3 to 87.9 | |
| 84.7 to 88.5 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 to 0.75 | |
| 0 to 0.6 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |