EN 1.4729 Stainless Steel vs. ASTM Grade HD Steel
Both EN 1.4729 stainless steel and ASTM grade HD steel are iron alloys. They have 80% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is ASTM grade HD steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 15 | |
| 9.1 |
| Poisson's Ratio | 0.28 | |
| 0.27 |
| Shear Modulus, GPa | 75 | |
| 80 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 310 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 460 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1410 |
| Melting Onset (Solidus), °C | 1380 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 490 |
| Thermal Conductivity, W/m-K | 24 | |
| 16 |
| Thermal Expansion, µm/m-K | 10 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.8 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.5 | |
| 17 |
| Density, g/cm3 | 7.6 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.1 | |
| 3.1 |
| Embodied Energy, MJ/kg | 29 | |
| 45 |
| Embodied Water, L/kg | 100 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 14 | |
| 29 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 26 |
| Thermal Diffusivity, mm2/s | 6.5 | |
| 4.3 |
Alloy Composition
| Carbon (C), % | 0.3 to 0.5 | |
| 0 to 0.5 |
| Chromium (Cr), % | 12 to 14 | |
| 26 to 30 |
| Iron (Fe), % | 80.4 to 86.7 | |
| 58.4 to 70 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 to 1.0 | |
| 4.0 to 7.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 1.0 to 2.5 | |
| 0 to 2.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |