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ASTM B685 Alloy vs. ASTM Grade HP Steel

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while ASTM grade HP 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 ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 43
78
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
490

Thermal Properties

Latent Heat of Fusion, J/g 180
320
Melting Completion (Liquidus), °C 1230
1370
Melting Onset (Solidus), °C 1200
1330
Specific Heat Capacity, J/kg-K 300
480
Thermal Expansion, µm/m-K 14
16

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
25
Strength to Weight: Axial, points 17 to 27
17
Strength to Weight: Bending, points 16 to 21
17
Thermal Shock Resistance, points 28 to 46
11

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0.35 to 0.75
Chromium (Cr), % 0
24 to 28
Copper (Cu), % 39.5 to 40.5
0
Iron (Fe), % 0 to 0.050
29.2 to 42.7
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
33 to 37
Palladium (Pd), % 59 to 60.5
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 2.5
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