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Grade 7 Titanium vs. S32050 Stainless Steel

Grade 7 titanium belongs to the titanium alloys classification, while S32050 stainless steel belongs to the iron alloys. There are 30 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 grade 7 titanium and the bottom bar is S32050 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
220
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 24
46
Fatigue Strength, MPa 250
340
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
81
Shear Strength, MPa 270
540
Tensile Strength: Ultimate (UTS), MPa 420
770
Tensile Strength: Yield (Proof), MPa 340
370

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 22
12
Thermal Expansion, µm/m-K 9.2
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.0
Embodied Carbon, kg CO2/kg material 47
6.0
Embodied Energy, MJ/kg 800
81
Embodied Water, L/kg 470
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
290
Resilience: Unit (Modulus of Resilience), kJ/m3 560
330
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 26
27
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 8.9
3.3
Thermal Shock Resistance, points 31
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0
0 to 0.4
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
43.1 to 51.8
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
6.0 to 6.6
Nickel (Ni), % 0
20 to 23
Nitrogen (N), % 0 to 0.030
0.21 to 0.32
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 98.7 to 99.88
0
Residuals, % 0 to 0.4
0