ASTM A229 Spring Steel vs. AISI 414 Stainless Steel
Both ASTM A229 spring steel and AISI 414 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is AISI 414 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 17 |
| Fatigue Strength, MPa | 710 to 790 | |
| 430 to 480 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 76 |
| Shear Strength, MPa | 1020 to 1140 | |
| 550 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 700 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 750 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1440 |
| Melting Onset (Solidus), °C | 1410 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 50 | |
| 25 |
| Thermal Expansion, µm/m-K | 12 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 8.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 2.1 |
| Embodied Energy, MJ/kg | 19 | |
| 29 |
| Embodied Water, L/kg | 46 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 1260 to 1590 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 32 to 34 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 27 to 28 |
| Thermal Diffusivity, mm2/s | 14 | |
| 6.7 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 33 to 35 |
Alloy Composition
| Carbon (C), % | 0.55 to 0.85 | |
| 0 to 0.15 |
| Chromium (Cr), % | 0 | |
| 11.5 to 13.5 |
| Iron (Fe), % | 97.5 to 99 | |
| 81.8 to 87.3 |
| Manganese (Mn), % | 0.3 to 1.2 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 | |
| 1.3 to 2.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.030 |