ASTM A229 Spring Steel vs. EN 1.4729 Stainless Steel
Both ASTM A229 spring steel and EN 1.4729 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is EN 1.4729 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 490 to 550 | |
| 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 15 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 75 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 850 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1420 |
| Melting Onset (Solidus), °C | 1410 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 490 |
| Thermal Conductivity, W/m-K | 50 | |
| 24 |
| Thermal Expansion, µm/m-K | 12 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 2.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 7.5 |
| Density, g/cm3 | 7.8 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 2.1 |
| Embodied Energy, MJ/kg | 19 | |
| 29 |
| Embodied Water, L/kg | 46 | |
| 100 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Thermal Diffusivity, mm2/s | 14 | |
| 6.5 |
Alloy Composition
| Carbon (C), % | 0.55 to 0.85 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 0 | |
| 12 to 14 |
| Iron (Fe), % | 97.5 to 99 | |
| 80.4 to 86.7 |
| Manganese (Mn), % | 0.3 to 1.2 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.030 |