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Grade 7 Titanium vs. S35315 Stainless Steel

Grade 7 titanium belongs to the titanium alloys classification, while S35315 stainless steel belongs to the iron alloys. There are 30 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 grade 7 titanium and the bottom bar is S35315 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 24
46
Fatigue Strength, MPa 250
280
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 38
78
Shear Strength, MPa 270
520
Tensile Strength: Ultimate (UTS), MPa 420
740
Tensile Strength: Yield (Proof), MPa 340
300

Thermal Properties

Latent Heat of Fusion, J/g 420
330
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1370
Melting Onset (Solidus), °C 1610
1330
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 22
12
Thermal Expansion, µm/m-K 9.2
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
2.0

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 47
5.7
Embodied Energy, MJ/kg 800
81
Embodied Water, L/kg 470
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
270
Resilience: Unit (Modulus of Resilience), kJ/m3 560
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 26
26
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 8.9
3.1
Thermal Shock Resistance, points 31
17

Alloy Composition

Carbon (C), % 0 to 0.080
0.040 to 0.080
Cerium (Ce), % 0
0.030 to 0.1
Chromium (Cr), % 0
24 to 26
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
33.6 to 40.6
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
34 to 36
Nitrogen (N), % 0 to 0.030
0.12 to 0.18
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
1.2 to 2.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.7 to 99.88
0
Residuals, % 0 to 0.4
0