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AISI 348 Stainless Steel vs. Grade 11 Titanium

AISI 348 stainless steel belongs to the iron alloys classification, while grade 11 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 348 stainless steel and the bottom bar is grade 11 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
120
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 41
29
Fatigue Strength, MPa 200
170
Poisson's Ratio 0.28
0.32
Reduction in Area, % 53
37
Shear Modulus, GPa 77
38
Shear Strength, MPa 400
200
Tensile Strength: Ultimate (UTS), MPa 580
310
Tensile Strength: Yield (Proof), MPa 230
230

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 940
320
Melting Completion (Liquidus), °C 1430
1660
Melting Onset (Solidus), °C 1390
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 16
22
Thermal Expansion, µm/m-K 16
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.7
47
Embodied Energy, MJ/kg 54
800
Embodied Water, L/kg 150
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
81
Resilience: Unit (Modulus of Resilience), kJ/m3 140
240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 4.2
8.9
Thermal Shock Resistance, points 13
22

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 17 to 19
0
Cobalt (Co), % 0 to 0.2
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 63.8 to 74
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 9.0 to 13
0
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0 to 0.1
0
Titanium (Ti), % 0
98.8 to 99.88
Residuals, % 0
0 to 0.4