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ASTM B685 Alloy vs. S35115 Stainless Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while S35115 stainless steel belongs to the iron alloys. 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 ASTM B685 alloy and the bottom bar is S35115 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 43
79
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
670

Thermal Properties

Latent Heat of Fusion, J/g 180
310
Melting Completion (Liquidus), °C 1230
1420
Melting Onset (Solidus), °C 1200
1370
Specific Heat Capacity, J/kg-K 300
480
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
2.3

Otherwise Unclassified Properties

Density, g/cm3 11
7.9

Common Calculations

Stiffness to Weight: Axial, points 6.1
14
Stiffness to Weight: Bending, points 15
25
Strength to Weight: Axial, points 17 to 27
24
Strength to Weight: Bending, points 16 to 21
22
Thermal Shock Resistance, points 28 to 46
15

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 39.5 to 40.5
0
Iron (Fe), % 0 to 0.050
47.6 to 55.8
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0
19 to 22
Nitrogen (N), % 0
0.2 to 0.3
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0.5 to 1.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0