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 |