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Commercially Pure Zirconium vs. SAE-AISI 4340M Steel

Commercially pure zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI 4340M steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is commercially pure zirconium and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 18
6.0
Fatigue Strength, MPa 60
690
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
72
Tensile Strength: Ultimate (UTS), MPa 430
2340
Tensile Strength: Yield (Proof), MPa 240
1240

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Specific Heat Capacity, J/kg-K 270
480
Thermal Conductivity, W/m-K 22
38
Thermal Expansion, µm/m-K 5.5
13

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.8
Embodied Water, L/kg 450
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65
120
Resilience: Unit (Modulus of Resilience), kJ/m3 290
4120
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 18
84
Strength to Weight: Bending, points 19
51
Thermal Diffusivity, mm2/s 12
10
Thermal Shock Resistance, points 56
70

Alloy Composition

Carbon (C), % 0 to 0.050
0.38 to 0.43
Chromium (Cr), % 0 to 0.2
0.7 to 1.0
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.2
93.3 to 94.8
Manganese (Mn), % 0
0.65 to 0.9
Molybdenum (Mo), % 0
0.35 to 0.45
Nickel (Ni), % 0
1.7 to 2.0
Nitrogen (N), % 0 to 0.025
0
Oxygen (O), % 0 to 0.16
0
Phosphorus (P), % 0
0 to 0.012
Silicon (Si), % 0
1.5 to 1.8
Sulfur (S), % 0
0 to 0.012
Vanadium (V), % 0
0.050 to 0.1
Zirconium (Zr), % 94.7 to 100
0