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AISI 444 Stainless Steel vs. Titanium 6-7

AISI 444 stainless steel belongs to the iron alloys classification, while titanium 6-7 belongs to the titanium 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 AISI 444 stainless steel and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 23
11
Fatigue Strength, MPa 210
530
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
45
Shear Strength, MPa 300
610
Tensile Strength: Ultimate (UTS), MPa 470
1020
Tensile Strength: Yield (Proof), MPa 310
900

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 930
300
Melting Completion (Liquidus), °C 1460
1700
Melting Onset (Solidus), °C 1420
1650
Specific Heat Capacity, J/kg-K 480
520
Thermal Expansion, µm/m-K 10
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
75
Density, g/cm3 7.7
5.1
Embodied Carbon, kg CO2/kg material 3.4
34
Embodied Energy, MJ/kg 47
540
Embodied Water, L/kg 130
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
110
Resilience: Unit (Modulus of Resilience), kJ/m3 240
3460
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
32
Strength to Weight: Axial, points 17
56
Strength to Weight: Bending, points 17
44
Thermal Shock Resistance, points 16
66

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.025
0 to 0.080
Chromium (Cr), % 17.5 to 19.5
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 73.3 to 80.8
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 1.8 to 2.5
6.5 to 7.5
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.2 to 0.8
6.5 to 7.5
Nitrogen (N), % 0 to 0.035
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0.2 to 0.8
84.9 to 88