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Grade 704C Zirconium vs. ASTM A232 Spring Steel

Grade 704C zirconium belongs to the otherwise unclassified metals classification, while ASTM A232 spring steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is grade 704C zirconium and the bottom bar is ASTM A232 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
540
Elastic (Young's, Tensile) Modulus, GPa 97
190
Elongation at Break, % 11
14
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
73
Tensile Strength: Ultimate (UTS), MPa 470
1790
Tensile Strength: Yield (Proof), MPa 310
1610

Thermal Properties

Latent Heat of Fusion, J/g 240
250
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 21
52
Thermal Expansion, µm/m-K 5.9
13

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.8
Embodied Water, L/kg 460
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
250
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 20
64
Strength to Weight: Bending, points 20
42
Thermal Diffusivity, mm2/s 12
14
Thermal Shock Resistance, points 58
53

Alloy Composition

Carbon (C), % 0 to 0.1
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.3
96.8 to 97.7
Manganese (Mn), % 0
0.7 to 0.9
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.010
0 to 0.020
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.035
Tin (Sn), % 1.0 to 2.0
0
Vanadium (V), % 0
0.15 to 0.3
Zirconium (Zr), % 92.9 to 99
0