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AISI 445 Stainless Steel vs. Grade 1 Titanium

AISI 445 stainless steel belongs to the iron alloys classification, while grade 1 titanium belongs to the titanium alloys. There are 31 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 AISI 445 stainless steel and the bottom bar is grade 1 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
120
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 25
28
Fatigue Strength, MPa 160
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
39
Shear Strength, MPa 310
200
Tensile Strength: Ultimate (UTS), MPa 480
310
Tensile Strength: Yield (Proof), MPa 230
220

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 950
320
Melting Completion (Liquidus), °C 1440
1660
Melting Onset (Solidus), °C 1390
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 21
20
Thermal Expansion, µm/m-K 11
8.8

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.6
31
Embodied Energy, MJ/kg 38
510
Embodied Water, L/kg 130
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98
79
Resilience: Unit (Modulus of Resilience), kJ/m3 140
230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 18
23
Thermal Diffusivity, mm2/s 5.6
8.2
Thermal Shock Resistance, points 16
24

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.080
Chromium (Cr), % 19 to 21
0
Copper (Cu), % 0.3 to 0.6
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 74.9 to 80.7
0 to 0.2
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0 to 0.6
0
Niobium (Nb), % 0 to 0.8
0
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.012
0
Titanium (Ti), % 0
99.095 to 100
Residuals, % 0
0 to 0.4