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Elmet Technologies

Erie Bronze 690® (9D) Bronze Mold Alloy
Categories: Metal; Nonferrous Metal; Copper Alloy; Bronze

Material Notes: 690 is used as a mold material in the glass container industry and other high temperature controlled heat transfer applications with severe wear conditions at elevated temperatures. Although slightly more susceptible to sulfur corrosion than 700XX, the ability to maintain consistent linear expansion during the heating and cooling cycles makes alloy 690 the perfect choice for glass container bottle molds.

690 has a time proven ability to resist corrosion in the glass making environment. When using 690, avoid using sulfur based swabbing compounds as release agents in either the blank or finish operation. Compounds used on the blank side will generally carryover to the finish side. When swabbing compounds containing sulfur are used in repeated production cycles, the sulfur will attack the aluminum and an orange peel texture will develop on the casting surface.

Information provided by Erie Bronze & Aluminum Co.

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Physical PropertiesMetricEnglishComments
Density 7.124 g/cc0.2574 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 190 - 220190 - 2203000 kg load
Tensile Strength, Ultimate 662 MPa96000 psi
Tensile Strength, Yield 324 MPa47000 psi0.5% Ext.
Elongation at Break 5 %5 %in 2 in.
Modulus of Elasticity 110 GPa16000 ksi
Machinability 50 %50 %Free Cutting Brass = 100
 
Thermal PropertiesMetricEnglishComments
CTE, linear  18.4 µm/m-°C
@Temperature 93.3 - 204 °C
10.2 µin/in-°F
@Temperature 200 - 400 °F
ASTM E-228
 19.4 µm/m-°C
@Temperature 204 - 316 °C
10.8 µin/in-°F
@Temperature 400 - 600 °F
ASTM E-228
 22.3 µm/m-°C
@Temperature 316 - 427 °C
12.4 µin/in-°F
@Temperature 600 - 800 °F
ASTM E-228
 23.0 µm/m-°C
@Temperature 427 - 538 °C
12.8 µin/in-°F
@Temperature 800 - 1000 °F
ASTM E-228
Specific Heat Capacity  0.490 J/g-°C
@Temperature 316 °C
0.117 BTU/lb-°F
@Temperature 600 °F
 0.510 J/g-°C
@Temperature 427 °C
0.122 BTU/lb-°F
@Temperature 800 °F
 0.527 J/g-°C
@Temperature 538 °C
0.126 BTU/lb-°F
@Temperature 1000 °F
Thermal Conductivity  46.5 W/m-K
@Temperature 538 °C
323 BTU-in/hr-ft²-°F
@Temperature 1000 °F
 48.2 W/m-K
@Temperature 427 °C
335 BTU-in/hr-ft²-°F
@Temperature 800 °F
 53.3 W/m-K
@Temperature 316 °C
370 BTU-in/hr-ft²-°F
@Temperature 600 °F
Melting Point 1040 °C1900 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 10.5 %10.5 %
Copper, Cu 81 %81 %
Iron, Fe 4 %4 %
Nickel, Ni 4 %4 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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