S15500 Stainless Steel vs. Grade 7 Titanium
S15500 stainless steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is S15500 stainless steel and the bottom bar is grade 7 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 290 to 430 | |
| 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 6.8 to 16 | |
| 24 |
| Fatigue Strength, MPa | 350 to 650 | |
| 250 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Reduction in Area, % | 17 to 40 | |
| 34 |
| Shear Modulus, GPa | 75 | |
| 38 |
| Shear Strength, MPa | 540 to 870 | |
| 270 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1490 | |
| 420 |
| Tensile Strength: Yield (Proof), MPa | 590 to 1310 | |
| 340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 820 | |
| 320 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1660 |
| Melting Onset (Solidus), °C | 1380 | |
| 1610 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 540 |
| Thermal Conductivity, W/m-K | 17 | |
| 22 |
| Thermal Expansion, µm/m-K | 11 | |
| 9.2 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 3.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 7.2 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 47 |
| Embodied Energy, MJ/kg | 39 | |
| 800 |
| Embodied Water, L/kg | 130 | |
| 470 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 120 | |
| 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 890 to 4460 | |
| 560 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 35 |
| Strength to Weight: Axial, points | 32 to 53 | |
| 26 |
| Strength to Weight: Bending, points | 26 to 37 | |
| 28 |
| Thermal Diffusivity, mm2/s | 4.6 | |
| 8.9 |
| Thermal Shock Resistance, points | 30 to 50 | |
| 31 |
Alloy Composition
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| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.080 |
| Chromium (Cr), % | 14 to 15.5 | |
| 0 |
| Copper (Cu), % | 2.5 to 4.5 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 71.9 to 79.9 | |
| 0 to 0.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Nickel (Ni), % | 3.5 to 5.5 | |
| 0 |
| Niobium (Nb), % | 0.15 to 0.45 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.25 |
| Palladium (Pd), % | 0 | |
| 0.12 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 98.7 to 99.88 |
| Residuals, % | 0 | |
| 0 to 0.4 |