Annealed AISI 204 vs. EN 1.4021 +A Steel
Both annealed AISI 204 and EN 1.4021 +A steel are iron alloys. Both are furnished in the annealed condition. They have 87% of their average alloy composition in common.
For each property being compared, the top bar is annealed AISI 204 and the bottom bar is EN 1.4021 +A steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 39 | |
| 17 |
| Fatigue Strength, MPa | 320 | |
| 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Rockwell B Hardness | 88 | |
| 82 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Shear Strength, MPa | 500 | |
| 390 |
| Tensile Strength: Ultimate (UTS), MPa | 730 | |
| 630 |
| Tensile Strength: Yield (Proof), MPa | 380 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 760 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1440 |
| Melting Onset (Solidus), °C | 1370 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 30 |
| Thermal Expansion, µm/m-K | 17 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 7.0 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.4 | |
| 1.9 |
| Embodied Energy, MJ/kg | 35 | |
| 27 |
| Embodied Water, L/kg | 130 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 360 | |
| 400 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 | |
| 23 |
| Strength to Weight: Bending, points | 24 | |
| 21 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 8.1 |
| Thermal Shock Resistance, points | 16 | |
| 22 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0.16 to 0.25 |
| Chromium (Cr), % | 15 to 17 | |
| 12 to 14 |
| Iron (Fe), % | 69.6 to 76.4 | |
| 83.2 to 87.8 |
| Manganese (Mn), % | 7.0 to 9.0 | |
| 0 to 1.5 |
| Nickel (Ni), % | 1.5 to 3.0 | |
| 0 |
| Nitrogen (N), % | 0.15 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |