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Grade 705C Zirconium vs. ASTM A372 Grade A Steel

Grade 705C zirconium belongs to the otherwise unclassified metals classification, while ASTM A372 grade A steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is grade 705C zirconium and the bottom bar is ASTM A372 grade A steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
140
Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 13
22
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
73
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 18
52
Thermal Expansion, µm/m-K 5.7
12

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
95
Resilience: Unit (Modulus of Resilience), kJ/m3 790
200
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 22
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 9.9
14
Thermal Shock Resistance, points 69
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.3
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
98.3 to 99.85
Manganese (Mn), % 0
0 to 1.0
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 0.015
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Zirconium (Zr), % 91.9 to 98
0