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S31730 Stainless Steel vs. Grade 702C Zirconium

S31730 stainless steel belongs to the iron alloys classification, while grade 702C zirconium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is grade 702C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
97
Elongation at Break, % 40
13
Poisson's Ratio 0.28
0.34
Rockwell B Hardness 78
84
Shear Modulus, GPa 77
36
Tensile Strength: Ultimate (UTS), MPa 540
430
Tensile Strength: Yield (Proof), MPa 200
310

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Expansion, µm/m-K 16
5.7

Otherwise Unclassified Properties

Density, g/cm3 8.0
6.7
Embodied Water, L/kg 180
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
52
Resilience: Unit (Modulus of Resilience), kJ/m3 99
510
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 18
19
Thermal Shock Resistance, points 12
55

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 4.0 to 5.0
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 52.4 to 61
0 to 0.3
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0
Nitrogen (N), % 0 to 0.045
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0
Zirconium (Zr), % 0
94.8 to 100