EN 1.4404 Stainless Steel vs. EN 1.7729 Steel
Both EN 1.4404 stainless steel and EN 1.7729 steel are iron alloys. They have 70% of their average alloy composition in common. There are 33 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 EN 1.4404 stainless steel and the bottom bar is EN 1.7729 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 270 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 14 to 43 | |
| 17 |
| Fatigue Strength, MPa | 220 to 320 | |
| 500 |
| Impact Strength: V-Notched Charpy, J | 91 to 93 | |
| 46 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 73 |
| Shear Strength, MPa | 420 to 550 | |
| 560 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 900 | |
| 910 |
| Tensile Strength: Yield (Proof), MPa | 240 to 570 | |
| 750 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 950 | |
| 430 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 40 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 3.8 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.8 | |
| 3.3 |
| Embodied Energy, MJ/kg | 52 | |
| 49 |
| Embodied Water, L/kg | 150 | |
| 59 |
Common Calculations
| PREN (Pitting Resistance) | 26 | |
| 4.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 210 | |
| 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 800 | |
| 1500 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 32 |
| Strength to Weight: Bending, points | 20 to 26 | |
| 27 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 11 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 27 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.015 to 0.080 |
| Arsenic (As), % | 0 | |
| 0 to 0.020 |
| Boron (B), % | 0 | |
| 0.0010 to 0.010 |
| Carbon (C), % | 0 to 0.030 | |
| 0.17 to 0.23 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 0.9 to 1.2 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 62.8 to 71.5 | |
| 94.8 to 97 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.35 to 0.75 |
| Molybdenum (Mo), % | 2.0 to 2.5 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 10 to 13 | |
| 0 to 0.2 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Tin (Sn), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0.070 to 0.15 |
| Vanadium (V), % | 0 | |
| 0.6 to 0.8 |