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EN 1.4031 Stainless Steel vs. Grade 705C Zirconium

EN 1.4031 stainless steel belongs to the iron alloys classification, while grade 705C zirconium belongs to the otherwise unclassified metals. There are 20 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 EN 1.4031 stainless steel and the bottom bar is grade 705C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 11 to 13
13
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 76
36
Tensile Strength: Ultimate (UTS), MPa 670 to 900
540
Tensile Strength: Yield (Proof), MPa 390 to 730
390

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 30
18
Thermal Expansion, µm/m-K 11
5.7

Otherwise Unclassified Properties

Density, g/cm3 7.7
6.7
Embodied Water, L/kg 100
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
66
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
790
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24 to 32
22
Strength to Weight: Bending, points 22 to 27
22
Thermal Diffusivity, mm2/s 8.1
9.9
Thermal Shock Resistance, points 23 to 32
69

Alloy Composition

Carbon (C), % 0.36 to 0.42
0 to 0.1
Chromium (Cr), % 12.5 to 14.5
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 83 to 87.1
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Zirconium (Zr), % 0
91.9 to 98