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SAE-AISI 4340M Steel vs. Commercially Pure Zirconium

SAE-AISI 4340M steel belongs to the iron alloys classification, while commercially pure zirconium belongs to the otherwise unclassified metals. 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 SAE-AISI 4340M steel and the bottom bar is commercially pure zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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