Copper (UNS C51900)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication
Applications

Introduction

Copper UNS C51900 is a phosphor bronze wrought alloy. Copper UNS C51900 alloy is resistant to seawater and industrial atmosphere. It is also resistant to stress corrosion cracking. It has an excellent combination of strength and electrical conductivity.

The following datasheet discusses the chemical composition and properties of copper UNS C51900.

Chemical Composition

The chemical composition of copper UNS C51900 is given in the following table.

Element Content (%)
Tin, Sn 5 – 7
Zinc, Zn 0.3 max
Phosphorous, P 0.03 - 0.35
Lead, Pb 0.05 max
Iron, Fe 0.1 max
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C51900.

Properties Metric Imperial
Density 8.84 g/cm3 0.319 lb/in3
Melting point (solidus) 930°C 1700°F

Mechanical Properties

The mechanical properties of copper UNS C51900 are tabulated below.

Properties Metric Imperial
Tensile strength (H04-temper) 551- 661 MPa 80 – 96 ksi
Yield strength 586 MPa 84 ksi
Elongation 13% 13%

Thermal Properties

The thermal properties of copper UNS C51900 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-300°C/68-392°F) 18 x 10-6 /°C 10x 10-6/°F
Thermal conductivity 6.2 W/mK 43 BTU in/hr.ft².°F

Other Designations

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Equivalent material to copper UNS C51900 is ASTM B103.

Fabrication

Machinability - The machinability of copper UNS C51900 alloy is rated at 20.

Welding - Soldering and butt welding are considered excellent welding options for this alloy. Gas arc shielding, laser welding, and spot welding are rated as good while oxyacetylene welding is rated fair. Coated metal arc welding and seam welding methods should be avoided.

Hot working - Copper UNS C51900 alloy has excellent hot working abilities.

Cold working - Copper UNS C51900 alloy has excellent cold working properties.

Applications

Copper UNS C51900 finds application in:

  • Stamped parts
  • Kettles and pots
  • Perforated sheets
  • Connectors
  • Contact springs
  • Flexible metal hoses
  • All types of springs
  • Electrical flexing contact blades

Copper UNS C51900 can be used in the paper, pulp, textile and chemical industries. It is applied in mechanical engineering, shipbuilding, and process equipment manufacture as well.

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