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Grade 4 Titanium vs. AISI 422 Stainless Steel

Grade 4 titanium belongs to the titanium alloys classification, while AISI 422 stainless steel belongs to the iron alloys. There are 32 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 4 titanium and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 17
15 to 17
Fatigue Strength, MPa 340
410 to 500
Poisson's Ratio 0.32
0.28
Reduction in Area, % 28
34 to 40
Shear Modulus, GPa 41
76
Shear Strength, MPa 390
560 to 660
Tensile Strength: Ultimate (UTS), MPa 640
910 to 1080
Tensile Strength: Yield (Proof), MPa 530
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Maximum Temperature: Mechanical, °C 320
650
Melting Completion (Liquidus), °C 1660
1480
Melting Onset (Solidus), °C 1610
1470
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 19
24
Thermal Expansion, µm/m-K 9.4
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 31
3.1
Embodied Energy, MJ/kg 500
44
Embodied Water, L/kg 110
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
1140 to 1910
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 40
32 to 38
Strength to Weight: Bending, points 37
26 to 30
Thermal Diffusivity, mm2/s 7.6
6.4
Thermal Shock Resistance, points 46
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.080
0.2 to 0.25
Chromium (Cr), % 0
11 to 12.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
81.9 to 85.8
Manganese (Mn), % 0
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0
0.5 to 1.0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 98.6 to 100
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3
Residuals, % 0 to 0.4
0