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R05240 Alloy vs. S21800 Stainless Steel

R05240 alloy belongs to the otherwise unclassified metals classification, while S21800 stainless steel belongs to the iron alloys. There are 18 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 R05240 alloy and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 150
190
Elongation at Break, % 25
40
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 57
75
Tensile Strength: Ultimate (UTS), MPa 270
740
Tensile Strength: Yield (Proof), MPa 170
390

Thermal Properties

Latent Heat of Fusion, J/g 210
340
Specific Heat Capacity, J/kg-K 190
500
Thermal Expansion, µm/m-K 6.8
16

Otherwise Unclassified Properties

Density, g/cm3 14
7.5
Embodied Water, L/kg 460
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59
250
Resilience: Unit (Modulus of Resilience), kJ/m3 90
390
Stiffness to Weight: Axial, points 6.3
14
Stiffness to Weight: Bending, points 13
26
Strength to Weight: Axial, points 5.4
27
Strength to Weight: Bending, points 6.8
24
Thermal Shock Resistance, points 18
17

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.1
Chromium (Cr), % 0
16 to 18
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
59.1 to 65.4
Manganese (Mn), % 0
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
8.0 to 9.0
Niobium (Nb), % 35 to 42
0
Nitrogen (N), % 0 to 0.010
0.080 to 0.18
Oxygen (O), % 0 to 0.020
0
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.0050
3.5 to 4.5
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 57.9 to 65
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
0