ASTM Grade 100-70-03 vs. ASTM Grade 120-90-02
Both ASTM grade 100-70-03 and ASTM grade 120-90-02 are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is ASTM grade 100-70-03 and the bottom bar is ASTM grade 120-90-02.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 270 | |
| 310 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 170 |
| Elongation at Break, % | 3.0 | |
| 2.1 |
| Fracture Toughness, MPa-m1/2 | 15 | |
| 14 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 68 | |
| 66 |
| Shear Strength, MPa | 630 | |
| 800 |
| Tensile Strength: Ultimate (UTS), MPa | 770 | |
| 920 |
| Tensile Strength: Yield (Proof), MPa | 530 | |
| 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 290 | |
| 290 |
| Melting Completion (Liquidus), °C | 1160 | |
| 1160 |
| Melting Onset (Solidus), °C | 1120 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 490 |
| Thermal Conductivity, W/m-K | 31 | |
| 31 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.2 | |
| 9.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 1.9 |
| Density, g/cm3 | 7.2 | |
| 7.2 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 | |
| 21 |
| Embodied Water, L/kg | 43 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 21 | |
| 17 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 790 | |
| 1330 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 26 | |
| 26 |
| Strength to Weight: Axial, points | 30 | |
| 35 |
| Strength to Weight: Bending, points | 26 | |
| 29 |
| Thermal Diffusivity, mm2/s | 8.9 | |
| 8.9 |
| Thermal Shock Resistance, points | 29 | |
| 35 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 3.0 to 3.5 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 93.7 to 95.5 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 to 0.080 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 1.5 to 2.8 |