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ASTM B685 Alloy vs. S45500 Stainless Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while S45500 stainless steel belongs to the iron alloys. There are 15 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 S45500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 43
75
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
1370 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 180
270
Melting Completion (Liquidus), °C 1230
1440
Melting Onset (Solidus), °C 1200
1400
Specific Heat Capacity, J/kg-K 300
470
Thermal Expansion, µm/m-K 14
11

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
24
Strength to Weight: Axial, points 17 to 27
48 to 65
Strength to Weight: Bending, points 16 to 21
35 to 42
Thermal Shock Resistance, points 28 to 46
48 to 64

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
11 to 12.5
Copper (Cu), % 39.5 to 40.5
1.5 to 2.5
Iron (Fe), % 0 to 0.050
71.5 to 79.2
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
7.5 to 9.5
Niobium (Nb), % 0
0 to 0.5
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.8 to 1.4
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0

Comparable Variants