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R58150 Titanium vs. S44725 Stainless Steel

R58150 titanium belongs to the titanium alloys classification, while S44725 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R58150 titanium and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
200
Elongation at Break, % 13
22
Fatigue Strength, MPa 330
210
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 52
81
Shear Strength, MPa 470
320
Tensile Strength: Ultimate (UTS), MPa 770
500
Tensile Strength: Yield (Proof), MPa 550
310

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1760
1450
Melting Onset (Solidus), °C 1700
1410
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 8.4
11

Otherwise Unclassified Properties

Base Metal Price, % relative 48
15
Density, g/cm3 5.4
7.7
Embodied Carbon, kg CO2/kg material 31
3.1
Embodied Energy, MJ/kg 480
44
Embodied Water, L/kg 150
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
99
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 32
25
Strength to Weight: Axial, points 40
18
Strength to Weight: Bending, points 35
18
Thermal Shock Resistance, points 48
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.1
67.6 to 73.5
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 14 to 16
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0 to 0.050
0 to 0.018
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 83.5 to 86
0 to 0.26