S17700 Stainless Steel vs. SAE-AISI 4340 Steel
Both S17700 stainless steel and SAE-AISI 4340 steel are iron alloys. They have 77% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is S17700 stainless steel and the bottom bar is SAE-AISI 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 430 | |
| 210 to 360 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 1.0 to 23 | |
| 12 to 22 |
| Fatigue Strength, MPa | 290 to 560 | |
| 330 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Shear Strength, MPa | 740 to 940 | |
| 430 to 770 |
| Tensile Strength: Ultimate (UTS), MPa | 1180 to 1650 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 430 to 1210 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 890 | |
| 430 |
| 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 | 15 | |
| 44 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 3.5 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.7 |
| Embodied Energy, MJ/kg | 40 | |
| 22 |
| Embodied Water, L/kg | 150 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 15 to 210 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 3750 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 42 to 59 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 32 to 40 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 4.1 | |
| 12 |
| Thermal Shock Resistance, points | 39 to 54 | |
| 20 to 38 |
Alloy Composition
| Aluminum (Al), % | 0.75 to 1.5 | |
| 0 |
| Carbon (C), % | 0 to 0.090 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 16 to 18 | |
| 0.7 to 0.9 |
| Iron (Fe), % | 70.5 to 76.8 | |
| 95.1 to 96.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 6.5 to 7.8 | |
| 1.7 to 2.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |