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ASTM A387 Grade 91 Class 2 vs. C64800 Bronze

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while C64800 bronze belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is C64800 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 20
8.0
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 75
44
Shear Strength, MPa 420
380
Tensile Strength: Ultimate (UTS), MPa 670
640
Tensile Strength: Yield (Proof), MPa 470
630

Thermal Properties

Latent Heat of Fusion, J/g 270
220
Maximum Temperature: Mechanical, °C 600
200
Melting Completion (Liquidus), °C 1460
1090
Melting Onset (Solidus), °C 1420
1030
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 26
260
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
65
Electrical Conductivity: Equal Weight (Specific), % IACS 10
66

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
33
Density, g/cm3 7.8
8.9
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 37
43
Embodied Water, L/kg 88
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
51
Resilience: Unit (Modulus of Resilience), kJ/m3 580
1680
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 24
20
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 6.9
75
Thermal Shock Resistance, points 19
23

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0 to 0.090
Cobalt (Co), % 0
1.0 to 3.0
Copper (Cu), % 0
92.4 to 98.8
Iron (Fe), % 87.3 to 90.3
0 to 1.0
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.5
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.5
Silicon (Si), % 0.2 to 0.5
0.2 to 1.0
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.5
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
0 to 0.5
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.5