SAE-AISI 8645 Steel vs. AISI 304L Stainless Steel
Both SAE-AISI 8645 steel and AISI 304L stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8645 steel and the bottom bar is AISI 304L stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 180 to 200 | |
160 to 350 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
200 |
Elongation at Break, % | 12 to 23 | |
6.7 to 46 |
Fatigue Strength, MPa | 280 to 350 | |
170 to 430 |
Poisson's Ratio | 0.29 | |
0.28 |
Shear Modulus, GPa | 73 | |
77 |
Shear Strength, MPa | 380 to 400 | |
370 to 680 |
Tensile Strength: Ultimate (UTS), MPa | 600 to 670 | |
540 to 1160 |
Tensile Strength: Yield (Proof), MPa | 390 to 560 | |
190 to 870 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
290 |
Maximum Temperature: Mechanical, °C | 410 | |
540 |
Melting Completion (Liquidus), °C | 1460 | |
1450 |
Melting Onset (Solidus), °C | 1420 | |
1400 |
Specific Heat Capacity, J/kg-K | 470 | |
480 |
Thermal Conductivity, W/m-K | 39 | |
16 |
Thermal Expansion, µm/m-K | 13 | |
17 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
2.4 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
2.7 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 2.6 | |
16 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
3.1 |
Embodied Energy, MJ/kg | 20 | |
44 |
Embodied Water, L/kg | 50 | |
150 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 120 | |
71 to 240 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 to 840 | |
92 to 1900 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 21 to 24 | |
19 to 41 |
Strength to Weight: Bending, points | 20 to 22 | |
19 to 31 |
Thermal Diffusivity, mm2/s | 10 | |
4.2 |
Thermal Shock Resistance, points | 18 to 20 | |
12 to 25 |
Alloy Composition
Carbon (C), % | 0.43 to 0.48 | |
0 to 0.030 |
Chromium (Cr), % | 0.4 to 0.6 | |
18 to 20 |
Iron (Fe), % | 96.5 to 97.7 | |
65 to 74 |
Manganese (Mn), % | 0.75 to 1.0 | |
0 to 2.0 |
Molybdenum (Mo), % | 0.15 to 0.25 | |
0 |
Nickel (Ni), % | 0.4 to 0.7 | |
8.0 to 12 |
Nitrogen (N), % | 0 | |
0 to 0.1 |
Phosphorus (P), % | 0 to 0.035 | |
0 to 0.045 |
Silicon (Si), % | 0.15 to 0.35 | |
0 to 0.75 |
Sulfur (S), % | 0 to 0.040 | |
0 to 0.030 |