Copper and Brass Rolled Sheet and Strip

A.J. Oster stocks and supplies the broadest product range of copper and brass alloys in the industry. Our inventory includes all of the alloys listed below in a variety of forms including sheet, strip, and coil, as well as a wide assortment of High Performance Alloys from Olin Brass, for enhanced performance. We also supply copper clad alloys that are tailored to meet specific customers’ needs.

Alloys are selected for applications based on strength, formability, conductivity, corrosion resistance, stress relaxation, wear resistance, color, machinability and other qualities. Each series of alloys will offer the ability to customize the performance of copper for the application.

Alloys

100 Series – Copper

Content
High purity (>95%) copper

Characteristics

  • Highest electrical and thermal conductivity
  • Good formability
  • Low mechanical strength
  • Poor high temperature performance

Application Notes
Typical uses include junction boxes and other high current connectors where conductivity takes precedence.

200 Series – Brass

Content
Copper and zinc alloys

Characteristics

  • Moderate electrical conductivity
  • Moderate strength
  • Excellent machinability
  • Poor formability
  • Poor high temperature performance
  • Better elasticity than copper

300 Series – Leaded Brass

Content
Copper, zinc, and lead alloys

Characteristics

  • Moderate electrical conductivity
  • Moderate strength
  • Excellent machinability
  • Poor formability
  • Poor high temperature performance (lead melts at low temperatures)

Application Notes
Leaded brass strip is common for the building and construction market, and can also be used in many other applications due to its good formability and “free-machining” capabilities.

400 Series – Tin Brass

Copper, zinc, and tin alloys

Characteristics

  • Moderate electrical conductivity
  • Moderate strength
  • Good formability
  • Good high temperature performance
  • Relatively inexpensive

Application Notes
Tin increases mechanical strength and corrosion resistance, and this series offers good spring and flexible properties preferred for use in terminals and comparable applications.

500 Series – Phosphor Bronze

Copper, tin, and phosphorous alloys

Characteristics

  • High thermal resistance
  • High tensile and mechanical strength
  • Low electrical conductivity
  • Directional formability
  • Good resistance to stress relaxation
  • Good spring properties
  • Good ductility and resistance to fatigue

Application Notes
An excellent choice for spring applications due to their elasticity; also used for mechanical springs, electrical contact springs, spring-type electrical connectors, terminals, diaphragms and bellows, jacks, and general connectors.

600 Series – Miscellaneous Bronzes

Includes copper, aluminum, zinc, silicon, cobalt, tin and chromium alloys

Characteristics

  • High strength
  • Low conductivity
  • High wear resistance (638)
  • Good stress relaxation and spring properties (654)
  • Non-directional formability (688)

700 Series – Cupro Nickels and Nickel Silvers

Includes copper,nickel, and zinc alloys

Characteristics

  • Exceptional corrosion resistance
  • High mechanical strength
  • Good ductility for deep draw
  • Good fatigue resistance
  • Low conductivity
  • Attractive colors
  • High cost due to high metal value

Application Notes
This is a premium series used primarily in very critical connector applications where environmental factors can cause deterioration in other alloys. The corrosion resistance and attractive colors of these alloys also make them well-suited for use as trim, badging, buckles jewelry, or trophies.

High Performance Alloys

Premium copper alloys using combinations of nickel, tin, phosphorous, iron, zinc, cobalt, magnesium, titanium, silver or chromium; includes 151, 19020, 19025, 194, 195, 197, 19720, 18080, 638, 654, 688, 7025, 7035

Characteristics

  • Best combination of strength to conductivity
  • High mechanical strength
  • Exceptional abrasion resistance
  • Excellent electrical properties
  • Environmentally friendly

Application Notes
Uniquely well-suited for miniaturized contacts where multiple functions need to be fitted into one connector to reduce bulk, including cockpit, dashboard, and instrumentation modules, as well as data transfer, telematics, infotainment, and sensors. Also an environmentally friendly replacement for beryllium copper.

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