AISI 303 Stainless Steel vs. ASTM A372 Grade K Steel
Both AISI 303 stainless steel and ASTM A372 grade K steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is AISI 303 stainless steel and the bottom bar is ASTM A372 grade K steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 210 | |
| 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 40 to 51 | |
| 23 |
| Fatigue Strength, MPa | 230 to 360 | |
| 440 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 430 to 470 | |
| 490 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 690 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 230 to 420 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 440 |
| 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 | |
| 48 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 4.4 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 1.8 |
| Embodied Energy, MJ/kg | 42 | |
| 24 |
| Embodied Water, L/kg | 140 | |
| 57 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 2.7 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 440 | |
| 1010 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 27 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 24 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 13 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 23 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.18 |
| Chromium (Cr), % | 17 to 19 | |
| 1.0 to 1.8 |
| Iron (Fe), % | 67.3 to 74.9 | |
| 93.4 to 96.6 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.1 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.6 |
| Nickel (Ni), % | 8.0 to 10 | |
| 2.0 to 3.3 |
| Phosphorus (P), % | 0 to 0.2 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0.15 to 0.35 | |
| 0 to 0.010 |