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ASTM B685 Alloy vs. SAE-AISI M7 Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI M7 steel belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (9, 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 M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 43
77
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 180
270
Melting Completion (Liquidus), °C 1230
1560
Melting Onset (Solidus), °C 1200
1510
Specific Heat Capacity, J/kg-K 300
450
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 11
8.1

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
26 to 76
Strength to Weight: Bending, points 16 to 21
23 to 47
Thermal Shock Resistance, points 28 to 46
24 to 69

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
1.0 to 1.1
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 39.5 to 40.5
0 to 0.25
Iron (Fe), % 0 to 0.050
79.8 to 83.8
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0
0 to 0.3
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.55
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0

Comparable Variants