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R05255 Alloy vs. R60802 Alloy

Both R05255 alloy and R60802 alloy are otherwise unclassified metals. Both are furnished in the annealed condition. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R05255 alloy and the bottom bar is R60802 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 20
22
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 70
36
Tensile Strength: Ultimate (UTS), MPa 540
430
Tensile Strength: Yield (Proof), MPa 450
270

Thermal Properties

Latent Heat of Fusion, J/g 140
250
Specific Heat Capacity, J/kg-K 140
270
Thermal Conductivity, W/m-K 59
22
Thermal Expansion, µm/m-K 6.6
6.0

Otherwise Unclassified Properties

Density, g/cm3 17
6.5
Embodied Water, L/kg 630
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
85
Resilience: Unit (Modulus of Resilience), kJ/m3 530
380
Stiffness to Weight: Axial, points 6.3
8.3
Stiffness to Weight: Bending, points 11
23
Strength to Weight: Axial, points 9.1
18
Strength to Weight: Bending, points 8.9
19
Thermal Diffusivity, mm2/s 25
12
Thermal Shock Resistance, points 31
53

Alloy Composition

Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 0
0.050 to 0.15
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0.070 to 0.2
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
0.030 to 0.080
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.015
0
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 95.9 to 98
0
Tin (Sn), % 0
1.2 to 1.7
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 2.0 to 3.5
0
Zirconium (Zr), % 0
97.8 to 98.7
Residuals, % 0
0 to 0.11