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AISI 312 Stainless Steel vs. Grade Ti-Pd7B Titanium

AISI 312 stainless steel belongs to the iron alloys classification, while grade Ti-Pd7B titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 312 stainless steel and the bottom bar is grade Ti-Pd7B titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
180
Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 28
17
Fatigue Strength, MPa 370
200
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 80
40
Tensile Strength: Ultimate (UTS), MPa 780
390
Tensile Strength: Yield (Proof), MPa 510
310

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Maximum Temperature: Mechanical, °C 1100
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 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
7.1

Otherwise Unclassified Properties

Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 3.4
49
Embodied Energy, MJ/kg 48
840
Embodied Water, L/kg 170
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
62
Resilience: Unit (Modulus of Resilience), kJ/m3 640
440
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 28
24
Strength to Weight: Bending, points 24
26
Thermal Diffusivity, mm2/s 4.3
8.9
Thermal Shock Resistance, points 21
30

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 24 to 26
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 62.2 to 69.2
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 1.2 to 2.0
0
Nickel (Ni), % 5.5 to 6.5
0 to 0.050
Nitrogen (N), % 0.14 to 0.2
0
Oxygen (O), % 0
0 to 0.4
Palladium (Pd), % 0
0.12 to 0.3
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.8 to 99.9
Residuals, % 0
0 to 0.4