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Elmet Technologies

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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 PropertiesOriginal ValueComments
Density 7.124 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 190 - 2203000 kg load
Tensile Strength, Ultimate 96000 psi
Tensile Strength, Yield 47000 psi0.5% Ext.
Elongation at Break 5 %in 2 in.
Modulus of Elasticity 16000 ksi
Machinability 50 %Free Cutting Brass = 100
 
Thermal PropertiesOriginal ValueComments
CTE, linear 10.2 µin/in-°F
@Temperature 93.3 - 204 °C
ASTM E-228
 10.8 µin/in-°F
@Temperature 204 - 316 °C
ASTM E-228
 12.4 µin/in-°F
@Temperature 316 - 427 °C
ASTM E-228
 12.8 µin/in-°F
@Temperature 427 - 538 °C
ASTM E-228
Specific Heat Capacity 0.117 BTU/lb-°F
@Temperature 316 °C
 0.122 BTU/lb-°F
@Temperature 427 °C
 0.126 BTU/lb-°F
@Temperature 538 °C
Thermal Conductivity 46.5 W/m-K
@Temperature 538 °C
 48.2 W/m-K
@Temperature 427 °C
 53.3 W/m-K
@Temperature 316 °C
Melting Point 1900 °F
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 10.5 %
Copper, Cu 81 %
Iron, Fe 4 %
Nickel, Ni 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 go back to viewing the property data in MatWeb's normal format.

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