ASTM A229 Spring Steel vs. EN 1.0580 Steel
Both ASTM A229 spring steel and EN 1.0580 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is EN 1.0580 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 490 to 550 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 5.6 to 25 |
| Fatigue Strength, MPa | 710 to 790 | |
| 210 to 270 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 1020 to 1140 | |
| 340 to 360 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 540 to 620 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 290 to 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 50 | |
| 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 18 |
| Embodied Water, L/kg | 46 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 31 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 230 to 540 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 19 to 22 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 19 to 21 |
| Thermal Diffusivity, mm2/s | 14 | |
| 14 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 17 to 20 |
Alloy Composition
| Carbon (C), % | 0.55 to 0.85 | |
| 0 to 0.22 |
| Iron (Fe), % | 97.5 to 99 | |
| 97.5 to 100 |
| Manganese (Mn), % | 0.3 to 1.2 | |
| 0 to 1.6 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.55 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.045 |