C90700 Bronze Vs. C91700 Bronze

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Home>Copper AlloyUp Three>Cast BronzeUp Two>C90700 BronzeUp OneC90700 Bronze vs. C91700 Bronze

Both C90700 bronze and C91700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is C90700 bronze and the bottom bar is C91700 bronze.

UNS C90700 (SAE 65) Gear BronzeUNS C91700 Nickel Gear BronzeMetric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90
90
Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 12
13
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 330
330
Tensile Strength: Yield (Proof), MPa 180
170

Thermal Properties

Latent Heat of Fusion, J/g 190
190
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 1000
1020
Melting Onset (Solidus), °C 830
850
Specific Heat Capacity, J/kg-K 370
370
Thermal Conductivity, W/m-K 71
71
Thermal Expansion, µm/m-K 18
18

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 35
36
Density, g/cm3 8.7
8.7
Embodied Carbon, kg CO2/kg material 3.7
3.9
Embodied Energy, MJ/kg 60
63
Embodied Water, L/kg 390
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 34
35
Resilience: Unit (Modulus of Resilience), kJ/m3 150
140
Stiffness to Weight: Axial, points 6.9
6.9
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 10
11
Strength to Weight: Bending, points 12
12
Thermal Diffusivity, mm2/s 22
22
Thermal Shock Resistance, points 12
12

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0 to 0.2
0 to 0.2
Copper (Cu), % 88 to 90
84.2 to 87.5
Iron (Fe), % 0 to 0.15
0 to 0.2
Lead (Pb), % 0 to 0.5
0 to 0.25
Nickel (Ni), % 0 to 0.5
1.2 to 2.0
Phosphorus (P), % 0 to 1.5
0 to 0.3
Silicon (Si), % 0 to 0.0050
0 to 0.0050
Sulfur (S), % 0 to 0.050
0 to 0.050
Tin (Sn), % 10 to 12
11.3 to 12.5
Zinc (Zn), % 0 to 0.5
0 to 0.25
Residuals, % 0 to 0.6
0
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Table of Contents

IntroductionMechanical PropertiesThermal PropertiesElectrical PropertiesOtherwise Unclassified PropertiesCommon CalculationsAlloy Composition

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