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Grade 4 Titanium vs. S39277 Stainless Steel

Grade 4 titanium belongs to the titanium alloys classification, while S39277 stainless steel belongs to the iron alloys. There are 32 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 grade 4 titanium and the bottom bar is S39277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
250
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 17
28
Fatigue Strength, MPa 340
480
Poisson's Ratio 0.32
0.27
Reduction in Area, % 28
57
Shear Modulus, GPa 41
80
Shear Strength, MPa 390
600
Tensile Strength: Ultimate (UTS), MPa 640
930
Tensile Strength: Yield (Proof), MPa 530
660

Thermal Properties

Latent Heat of Fusion, J/g 420
300
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 19
16
Thermal Expansion, µm/m-K 9.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
23
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 31
4.2
Embodied Energy, MJ/kg 500
59
Embodied Water, L/kg 110
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
240
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
1070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 40
33
Strength to Weight: Bending, points 37
27
Thermal Diffusivity, mm2/s 7.6
4.2
Thermal Shock Resistance, points 46
26

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.025
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0
1.2 to 2.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
56.8 to 64.3
Manganese (Mn), % 0
0 to 0.8
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
6.5 to 8.0
Nitrogen (N), % 0 to 0.050
0.23 to 0.33
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0
0 to 0.0020
Titanium (Ti), % 98.6 to 100
0
Tungsten (W), % 0
0.8 to 1.2
Residuals, % 0 to 0.4
0