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ASTM B685 Alloy vs. SAE-AISI M3 Class 2 Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while SAE-AISI M3 class 2 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 M3 class 2 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
770 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 180
260
Melting Completion (Liquidus), °C 1230
1620
Melting Onset (Solidus), °C 1200
1570
Specific Heat Capacity, J/kg-K 300
440
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 11
8.3

Common Calculations

Stiffness to Weight: Axial, points 6.1
13
Stiffness to Weight: Bending, points 15
23
Strength to Weight: Axial, points 17 to 27
26 to 74
Strength to Weight: Bending, points 16 to 21
22 to 45
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
1.2 to 1.3
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 39.5 to 40.5
0 to 0.25
Iron (Fe), % 0 to 0.050
75.8 to 82.3
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.8 to 6.5
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 0.45
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
5.0 to 6.8
Vanadium (V), % 0
2.8 to 3.8
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0

Comparable Variants