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ASTM A372 Grade H Steel vs. Grade 702C Zirconium

ASTM A372 grade H steel belongs to the iron alloys classification, while grade 702C zirconium belongs to the otherwise unclassified metals. There are 21 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 grade 702C zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
180
Elastic (Young's, Tensile) Modulus, GPa 190
97
Elongation at Break, % 20 to 22
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
36
Tensile Strength: Ultimate (UTS), MPa 650 to 910
430
Tensile Strength: Yield (Proof), MPa 430 to 550
310

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
52
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
510
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 23 to 32
18
Strength to Weight: Bending, points 21 to 27
19
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 19 to 27
55

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.1
Chromium (Cr), % 0.4 to 0.65
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 97.3 to 98.3
0 to 0.3
Manganese (Mn), % 0.75 to 1.1
0
Molybdenum (Mo), % 0.15 to 0.25
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.015
0 to 0.010
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.010
0
Zirconium (Zr), % 0
94.8 to 100