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Low-oxygen Zirconium vs. SAE-AISI 4340M Steel

Low-oxygen zirconium belongs to the otherwise unclassified metals classification, while SAE-AISI 4340M steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is low-oxygen 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, % 23
6.0
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 37
72
Tensile Strength: Ultimate (UTS), MPa 330
2340
Tensile Strength: Yield (Proof), MPa 270
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 5.7
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 70
120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
4120
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 14
84
Strength to Weight: Bending, points 16
51
Thermal Diffusivity, mm2/s 12
10
Thermal Shock Resistance, points 42
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 0.1
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