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ASTM A372 Grade H Steel vs. Low-oxygen Zirconium

ASTM A372 grade H steel belongs to the iron alloys classification, while low-oxygen zirconium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A372 grade H steel and the bottom bar is low-oxygen zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 20 to 22
23
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
37
Tensile Strength: Ultimate (UTS), MPa 650 to 910
330
Tensile Strength: Yield (Proof), MPa 430 to 550
270

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 45
22
Thermal Expansion, µm/m-K 13
5.7

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 49
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 160
70
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
370
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 23 to 32
14
Strength to Weight: Bending, points 21 to 27
16
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 19 to 27
42

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.050
Chromium (Cr), % 0.4 to 0.65
0 to 0.2
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 97.3 to 98.3
0 to 0.2
Manganese (Mn), % 0.75 to 1.1
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.010
0
Zirconium (Zr), % 0
94.7 to 100