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ASTM A266 Carbon Steel vs. ASTM B685 Alloy

ASTM A266 carbon steel belongs to the iron alloys classification, while ASTM B685 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is ASTM A266 carbon steel and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 73
43
Tensile Strength: Ultimate (UTS), MPa 500 to 600
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 250
180
Melting Completion (Liquidus), °C 1460
1230
Melting Onset (Solidus), °C 1420
1200
Specific Heat Capacity, J/kg-K 470
300
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
4.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
11

Common Calculations

Stiffness to Weight: Axial, points 13
6.1
Stiffness to Weight: Bending, points 24
15
Strength to Weight: Axial, points 18 to 21
17 to 27
Strength to Weight: Bending, points 18 to 20
16 to 21
Thermal Shock Resistance, points 16 to 19
28 to 46