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R30556 Alloy vs. Grade 28 Titanium

R30556 alloy belongs to the iron alloys classification, while grade 28 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is grade 28 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Elongation at Break, % 45
11 to 17
Fatigue Strength, MPa 320
330 to 480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 81
40
Shear Strength, MPa 550
420 to 590
Tensile Strength: Ultimate (UTS), MPa 780
690 to 980
Tensile Strength: Yield (Proof), MPa 350
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1100
330
Melting Completion (Liquidus), °C 1420
1640
Melting Onset (Solidus), °C 1330
1590
Specific Heat Capacity, J/kg-K 450
550
Thermal Conductivity, W/m-K 11
8.3
Thermal Expansion, µm/m-K 15
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 70
36
Density, g/cm3 8.4
4.5
Embodied Carbon, kg CO2/kg material 8.7
37
Embodied Energy, MJ/kg 130
600
Embodied Water, L/kg 300
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 290
1370 to 3100
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 26
43 to 61
Strength to Weight: Bending, points 22
39 to 49
Thermal Diffusivity, mm2/s 2.9
3.4
Thermal Shock Resistance, points 18
47 to 66

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
2.5 to 3.5
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0 to 0.080
Chromium (Cr), % 21 to 23
0
Cobalt (Co), % 16 to 21
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 20.4 to 38.2
0 to 0.25
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0
Molybdenum (Mo), % 2.5 to 4.0
0
Nickel (Ni), % 19 to 22.5
0
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Phosphorus (P), % 0 to 0.040
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0.2 to 0.8
0
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0.3 to 1.3
0
Titanium (Ti), % 0
92.4 to 95.4
Tungsten (W), % 2.0 to 3.5
0
Vanadium (V), % 0
2.0 to 3.0
Zinc (Zn), % 0.0010 to 0.1
0
Residuals, % 0
0 to 0.4