Copper Alloy (UNS C91100)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


Copper UNS C91100 is a casting alloy. Casting is a manufacturing process that has been in use for around 6000 years and involves pouring of molten metal into a mold to form a part. Many of the copper alloys are known for their good castability, as well as their good corrosion resistance, ductility, formability,

The following datasheet discusses the chemical composition and properties of copper UNS C91100.

Chemical Composition

The chemical composition of copper UNS C91100 is given in the following table.

Element Content (%)
Copper, Cu 84
Tin, Sn 16

Physical Properties

The following table discusses the physical properties of copper UNS C91100.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3
Melting point – (solidus) 818°C 1505°F
Melting point – (liquidus) 950°C 1742°F

Mechanical Properties

The mechanical properties of copper UNS C91100 are tabulated below.

Properties Metric Imperial
Tensile strength 241 MPa 35 ksi
Yield strength 172 MPa 25 ksi
Modulus of elasticity in tension 103400 MPa 15000 ksi
Poisson’s ratio 0.34 0.34
Elongation 2% 2%
Hardness (HB) 135 135

Other Designations

Looking for equipment to analyze your metals?

Let us source quotes for you for X-Ray Fluorescence Analyzers, Optical Emission Spectrometers, Atomic Absorption Spectrometers or any other analysis instrument you are looking for.

Other designations that are equivalent to copper UNS C91100 include:

  • ASTM B22
  • ASTM B30


Machinability - The machinability of copper UNS C91100 alloy is rated at 10.

Welding - Soldering is the best method to use for welding copper UNS C91100, while brazing can provide good results. Oxyacetylene welding, carbon arc welding, gas shielded arc welding, and coated metal arc welding are rated as fair.

Heat Treatment - Copper UNS C91100 does not respond to heat treatment. The stress relieving temperature is 260°C (500°F), and the time at temperature is 1 h/in of section thickness.


Copper UNS C91100 finds application in:

  • Hollow conductors
  • Bushings
  • Bearings
  • Piston rings.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.