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ASTM B685 Alloy vs. SAE-AISI 50B50 Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI 50B50 steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is SAE-AISI 50B50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 43
73
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
590

Thermal Properties

Latent Heat of Fusion, J/g 180
250
Melting Completion (Liquidus), °C 1230
1460
Melting Onset (Solidus), °C 1200
1410
Specific Heat Capacity, J/kg-K 300
470
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
8.3

Otherwise Unclassified Properties

Density, g/cm3 11
7.8

Common Calculations

Stiffness to Weight: Axial, points 6.1
13
Stiffness to Weight: Bending, points 15
24
Strength to Weight: Axial, points 17 to 27
21
Strength to Weight: Bending, points 16 to 21
20
Thermal Shock Resistance, points 28 to 46
17

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Boron (B), % 0
0.00050 to 0.0030
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0.48 to 0.53
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 39.5 to 40.5
0
Iron (Fe), % 0 to 0.050
97.4 to 98.2
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0.75 to 1.0
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0