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ASTM B631 Class A vs. Grade 705C Zirconium

Both ASTM B631 class A and grade 705C zirconium are otherwise unclassified metals. There are 12 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown. 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 ASTM B631 class A and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
98
Poisson's Ratio 0.3
0.34
Rockwell B Hardness 63 to 98
87
Shear Modulus, GPa 85 to 86
36

Thermal Properties

Latent Heat of Fusion, J/g 160
250
Specific Heat Capacity, J/kg-K 160
270
Thermal Conductivity, W/m-K 420
18
Thermal Expansion, µm/m-K 11
5.7

Otherwise Unclassified Properties

Density, g/cm3 15
6.7

Common Calculations

Stiffness to Weight: Axial, points 8.5
8.1
Stiffness to Weight: Bending, points 14
23
Thermal Diffusivity, mm2/s 180
9.9