ASTM A229 Spring Steel vs. Nickel 718
ASTM A229 spring steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 12 to 50 |
| Fatigue Strength, MPa | 710 to 790 | |
| 460 to 760 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 75 |
| Shear Strength, MPa | 1020 to 1140 | |
| 660 to 950 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 930 to 1530 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 510 to 1330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 310 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 980 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1340 |
| Melting Onset (Solidus), °C | 1410 | |
| 1260 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 50 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 1.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 75 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 13 |
| Embodied Energy, MJ/kg | 19 | |
| 190 |
| Embodied Water, L/kg | 46 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 140 to 390 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 660 to 4560 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 31 to 51 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 25 to 35 |
| Thermal Diffusivity, mm2/s | 14 | |
| 3.0 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 27 to 44 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.55 to 0.85 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 97.5 to 99 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0.3 to 1.2 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 | |
| 50 to 55 |
| Niobium (Nb), % | 0 | |
| 4.8 to 5.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.65 to 1.2 |