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S40977 Stainless Steel vs. Nuclear Grade Hafnium

S40977 stainless steel belongs to the iron alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is S40977 stainless steel and the bottom bar is nuclear grade hafnium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
78
Elongation at Break, % 21
25
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 76
31
Tensile Strength: Ultimate (UTS), MPa 510
350
Tensile Strength: Yield (Proof), MPa 310
170

Thermal Properties

Latent Heat of Fusion, J/g 270
130
Specific Heat Capacity, J/kg-K 480
140
Thermal Expansion, µm/m-K 10
5.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
73
Resilience: Unit (Modulus of Resilience), kJ/m3 250
180
Stiffness to Weight: Axial, points 14
3.3
Stiffness to Weight: Bending, points 25
11
Strength to Weight: Axial, points 18
7.4
Strength to Weight: Bending, points 18
8.4
Thermal Shock Resistance, points 18
55

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 10.5 to 12.5
0
Hafnium (Hf), % 0
99.8 to 100
Iron (Fe), % 83.9 to 89.2
0
Manganese (Mn), % 0 to 1.5
0
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Residuals, % 0
0 to 0.23