ASTM A229 Spring Steel vs. ASTM A514 Steel
Both ASTM A229 spring steel and ASTM A514 steel are iron alloys.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is ASTM A514 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 490 to 550 | |
| 240 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 18 to 21 |
| Fatigue Strength, MPa | 710 to 790 | |
| 470 to 540 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Shear Strength, MPa | 1020 to 1140 | |
| 490 to 520 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 790 to 830 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 690 to 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 to 260 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 to 440 |
| 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 | |
| 37 to 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 to 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.3 to 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 2.3 to 3.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.6 to 1.8 |
| Embodied Energy, MJ/kg | 19 | |
| 21 to 25 |
| Embodied Water, L/kg | 46 | |
| 48 to 57 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 140 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 1280 to 1590 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 28 to 29 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 14 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 23 to 24 |