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Grade 705C Zirconium vs. SAE-AISI 1078 Steel

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI 1078 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is grade 705C zirconium and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 13
11 to 14
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
72
Tensile Strength: Ultimate (UTS), MPa 540
730 to 780
Tensile Strength: Yield (Proof), MPa 390
430 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 18
49
Thermal Expansion, µm/m-K 5.7
11

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.8
Embodied Water, L/kg 450
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 66
77 to 90
Resilience: Unit (Modulus of Resilience), kJ/m3 790
490 to 860
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 22
26 to 28
Strength to Weight: Bending, points 22
23 to 24
Thermal Diffusivity, mm2/s 9.9
13
Thermal Shock Resistance, points 69
25 to 26

Alloy Composition

Carbon (C), % 0 to 0.1
0.72 to 0.85
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
98.5 to 99
Manganese (Mn), % 0
0.3 to 0.6
Niobium (Nb), % 2.0 to 3.0
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Zirconium (Zr), % 91.9 to 98
0