ASTM A225 Steel vs. Nickel 690
ASTM A225 steel belongs to the iron alloys classification, while nickel 690 belongs to the nickel alloys.
For each property being compared, the top bar is ASTM A225 steel and the bottom bar is nickel 690.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 250 | |
| 90 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 21 to 23 | |
| 3.4 to 34 |
| Fatigue Strength, MPa | 330 to 390 | |
| 180 to 300 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 79 |
| Shear Strength, MPa | 390 to 520 | |
| 420 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 830 | |
| 640 to 990 |
| Tensile Strength: Yield (Proof), MPa | 460 to 550 | |
| 250 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 1010 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1380 |
| Melting Onset (Solidus), °C | 1420 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 52 | |
| 14 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 1.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 1.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.3 | |
| 50 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 8.2 |
| Embodied Energy, MJ/kg | 24 to 25 | |
| 120 |
| Embodied Water, L/kg | 48 | |
| 290 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 170 | |
| 31 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 580 to 820 | |
| 160 to 1440 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 29 | |
| 21 to 33 |
| Strength to Weight: Bending, points | 21 to 25 | |
| 20 to 27 |
| Thermal Diffusivity, mm2/s | 14 | |
| 3.5 |
| Thermal Shock Resistance, points | 18 to 24 | |
| 16 to 25 |