AISI 321 Stainless Steel vs. AISI 202 Stainless Steel
Both AISI 321 stainless steel and AISI 202 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is AISI 202 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 210 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 34 to 50 | |
| 14 to 45 |
| Fatigue Strength, MPa | 220 to 270 | |
| 290 to 330 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 420 to 460 | |
| 490 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 690 | |
| 700 to 980 |
| Tensile Strength: Yield (Proof), MPa | 220 to 350 | |
| 310 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 480 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 910 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1400 |
| Melting Onset (Solidus), °C | 1400 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 15 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 13 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 2.8 |
| Embodied Energy, MJ/kg | 45 | |
| 40 |
| Embodied Water, L/kg | 140 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 to 230 | |
| 120 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 310 | |
| 250 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 25 to 35 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 4.0 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 15 to 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.15 |
| Chromium (Cr), % | 17 to 19 | |
| 17 to 19 |
| Iron (Fe), % | 65.3 to 74 | |
| 63.5 to 71.5 |
| Manganese (Mn), % | 0 to 2.0 | |
| 7.5 to 10 |
| Nickel (Ni), % | 9.0 to 12 | |
| 4.0 to 6.0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.7 | |
| 0 |