ASTM A229 Spring Steel vs. K94200 Alloy
Both ASTM A229 spring steel and K94200 alloy are iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is K94200 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 140 |
| Elongation at Break, % | 14 | |
| 5.0 to 32 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 72 | |
| 54 |
| Shear Strength, MPa | 1020 to 1140 | |
| 330 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 500 to 710 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 270 to 650 |
Thermal Properties
| Melting Onset (Solidus), °C | 1410 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 500 |
| Thermal Conductivity, W/m-K | 50 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 5.0 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 2.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 3.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 8.2 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 35 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 250 to 1460 |
| Stiffness to Weight: Axial, points | 13 | |
| 9.8 |
| Stiffness to Weight: Bending, points | 24 | |
| 21 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 17 to 24 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 17 to 22 |
| Thermal Diffusivity, mm2/s | 14 | |
| 3.7 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 49 to 70 |