ASTM A229 Spring Steel vs. ASTM B522 Class I
ASTM A229 spring steel belongs to the iron alloys classification, while ASTM B522 class I belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is ASTM B522 class I.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 96 |
| Elongation at Break, % | 14 | |
| 1.1 to 29 |
| Poisson's Ratio | 0.29 | |
| 0.41 |
| Shear Modulus, GPa | 72 | |
| 34 |
| Shear Strength, MPa | 1020 to 1140 | |
| 180 to 280 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1890 | |
| 280 to 490 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1230 | |
| 120 to 210 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 77 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1030 |
| Melting Onset (Solidus), °C | 1410 | |
| 1030 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 160 |
| Thermal Expansion, µm/m-K | 12 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 5.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 17 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 200 to 230 | |
| 4.5 to 64 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3260 to 4080 | |
| 75 to 230 |
| Stiffness to Weight: Axial, points | 13 | |
| 3.1 |
| Stiffness to Weight: Bending, points | 24 | |
| 8.9 |
| Strength to Weight: Axial, points | 60 to 67 | |
| 4.4 to 7.8 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 5.5 to 8.0 |
| Thermal Shock Resistance, points | 54 to 60 | |
| 13 to 24 |
Alloy Composition
| Carbon (C), % | 0.55 to 0.85 | |
| 0 |
| Gold (Au), % | 0 | |
| 68 to 70 |
| Iron (Fe), % | 97.5 to 99 | |
| 0 |
| Manganese (Mn), % | 0.3 to 1.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Platinum (Pt), % | 0 | |
| 5.0 to 7.0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Silver (Ag), % | 0 | |
| 23.5 to 26.5 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.35 |