Copper

Copper centrifugal castings from JBM cover the full range of copper alloys including high thermal and electrical conductive pure coppers and chrome copper alloys, through high strength aluminum and manganese bronzes, to traditional leaded bearing bronze castings and nickel silver castings.

Copper castings from JBM are a cost-effective alternative to copper forgings. Some of the common component applications of copper alloy castings include:

• Bronze Gear Blanks: Meeting the strength levels of many stainless steels, aluminum bronze, manganese bronze and tin bronze are often specified because of their relative low cost and high resistance to galling. We produce many designs used for worm gears and hub gears to near finished machine conditions.

• Corrosion and Anti-Galling Components: The aluminum bronze family (C95400, C95500) is ideal for bearing, gear, sealing, and valve and pump components where corrosion and steel galling are problems. Application industries include hydroelectric, wastewater, motor and power transmission, and instrument housing. When exposed to seawater for naval use, the basic alloys are modified with higher nickel contents (C95800) to retard corrosion.

• Steam Turbine Parts: Steam turbine repair parts and new steam turbine parts are readily made through the centrifugal forming process. The anti-galling resistance of Nickel Silver (CDA C97300 and C97600 – ASTM B584) make these alloys ideal for packing and labyrinth rings.

• High Thermal and Electrical Conductivity Chrome Copper: Chrome copper alloys combine the high conductivity of pure copper alloys with the high strength of the bronze family. Alloys such as CDA C81500 are often specified for continuous casting molds of metals where high thermal conductivity and strength are required. These alloys also are used in a wide variety of machinery (e.g. paper mill and carpet conveyor and take-up rolls) as brake drums and discs.

• Crusher Equipment Parts: Crusher repair parts and crusher replacement parts are often centrifugally cast at JBM. Critical wear components such as bearings and bronze bushings for gyratory and ball or bar mills are often produced in traditional leaded tin bronze alloys such as SAE 660 (CDA C93200), higher lead bronze alloys such as CDA C93700, CDA 93800, and up to the 18% lead alloy C94100 and higher. Our components service major OEM equipment such as Nordberg®, Allis-Chalmers®, Svedala® and many others.

• Mining Equipment Parts: Mining equipment repair and replacement parts are another effective application of copper alloy castings. Similar to crusher applications, high strength and leaded bronze and brass alloys are called on for high load and high abrasion applications. Our components see service in major OEM equipment such as P & H®/Harnischfeger, Marion®, and many others.

JBM produces for direct replacement many wear, bushing, and washer parts for crushers, shovels, and draglines. By buying direct, you receive almost 100 years experience at substantial cost savings over OEM purchases. Just as importantly, JBM can often ship finished machine components within days of your order.

More copper based alloy casting applications:

• Pure Copper Conductor Rings: The high conductivity of pure copper, centrifugally cast in the CDA C81100 alloys is required for electrical motor rotor components, magnetic motor cores, and other naval and power industrial contact motors.

• Spinodal Alloys: High strength spinodal bronze alloys such as C72700 are especially suited for gears, bushings, and forming rolls. Spinodal alloys combine the high strength of conventional bronze alloys with the lubricity of leaded bronze alloys.

• Propertzi Casting Rolls: Continuous casting of aluminum and copper wire and rod requires high conductivity and thermal shock resistant specialty copper alloys such copper silver and chrome zirconium copper alloys.

JBM regularly produces copper centrifugal castings from the copper alloys listed below. Our lightening-fast turnaround time will help you win new business.

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FAMILY		ALLOY GRADES
Red Brass		C83300, C83600, C83800
Semi-Red Brass		C84400, C84800
Yellow Brass		C85200, C85400, C85700
Manganese Bronze		C86200, C86300, C86400, C86500
Copper-Silicon		C87200, C87500
Leaded Tin Bronze		C92200, C92300, C92600, C92700, C93700, C93800, C94100, C94500
Tin Bronze		C90300, C90500, C90700, C90800, C91600, C91700, C93200, C93400, C93500, C94300
Aluminum Bronze		C95200, C95300, C95400, C95500, C95800
Copper Nickel		C96200, C96400
Nickel Silver		C97300, C97600, C97800
Pure, Chrome Coppers		C81100, C81500