SAE-AISI 9254 Steel vs. SAE-AISI 5120 Steel
Both SAE-AISI 9254 steel and SAE-AISI 5120 steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is SAE-AISI 9254 steel and the bottom bar is SAE-AISI 5120 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 200 | |
150 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 20 | |
16 |
Fatigue Strength, MPa | 280 | |
210 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 72 | |
73 |
Shear Strength, MPa | 410 | |
310 |
Tensile Strength: Ultimate (UTS), MPa | 660 | |
500 |
Tensile Strength: Yield (Proof), MPa | 410 | |
320 |
Thermal Properties
Latent Heat of Fusion, J/g | 270 | |
250 |
Maximum Temperature: Mechanical, °C | 410 | |
420 |
Melting Completion (Liquidus), °C | 1440 | |
1460 |
Melting Onset (Solidus), °C | 1400 | |
1420 |
Specific Heat Capacity, J/kg-K | 480 | |
470 |
Thermal Conductivity, W/m-K | 46 | |
47 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
8.2 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.2 | |
2.1 |
Density, g/cm3 | 7.7 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
1.4 |
Embodied Energy, MJ/kg | 20 | |
19 |
Embodied Water, L/kg | 49 | |
49 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
71 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 450 | |
280 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 25 | |
24 |
Strength to Weight: Axial, points | 24 | |
18 |
Strength to Weight: Bending, points | 22 | |
18 |
Thermal Diffusivity, mm2/s | 12 | |
13 |
Thermal Shock Resistance, points | 20 | |
16 |
Alloy Composition
Carbon (C), % | 0.51 to 0.59 | |
0.17 to 0.22 |
Chromium (Cr), % | 0.6 to 0.8 | |
0.7 to 0.9 |
Iron (Fe), % | 96.1 to 97.1 | |
97.6 to 98.3 |
Manganese (Mn), % | 0.6 to 0.8 | |
0.7 to 0.9 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.035 |
Silicon (Si), % | 1.2 to 1.6 | |
0.15 to 0.35 |
Sulfur (S), % | 0 to 0.040 | |
0 to 0.040 |