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SAE-AISI 4340M Steel vs. Grade 704C Zirconium

SAE-AISI 4340M steel belongs to the iron alloys classification, while grade 704C zirconium belongs to the otherwise unclassified metals. There are 21 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 SAE-AISI 4340M steel and the bottom bar is grade 704C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
210
Elastic (Young's, Tensile) Modulus, GPa 190
97
Elongation at Break, % 6.0
11
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
36
Tensile Strength: Ultimate (UTS), MPa 2340
470
Tensile Strength: Yield (Proof), MPa 1240
310

Thermal Properties

Latent Heat of Fusion, J/g 280
240
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 38
21
Thermal Expansion, µm/m-K 13
5.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 55
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
48
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
490
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 84
20
Strength to Weight: Bending, points 51
20
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 70
58

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.1
Chromium (Cr), % 0.7 to 1.0
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 93.3 to 94.8
0 to 0.3
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 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.012
0 to 0.010
Silicon (Si), % 1.5 to 1.8
0
Sulfur (S), % 0 to 0.012
0
Tin (Sn), % 0
1.0 to 2.0
Vanadium (V), % 0.050 to 0.1
0
Zirconium (Zr), % 0
92.9 to 99