UNS Standard Designation for Copper

Cu, C12200

UNS is the unified numbering system used in alloy designation system. It is not a specification but an orderly method of identifying copper and copper alloy. The purpose is to provide a tracking with identification marking of mill and foundry products.

Copper coil. Image by Ra-Dragon via Unsplash. Copyright- Free

Numbers from C10000 through C79999 denotes wrought alloys.

Numbers from C80000 to C99999 denotes cast alloys.

Within wrought alloy, the compositions are grouped into the following families of copper and copper alloys.

Copper and High Copper Alloys

Copper and high coppy alloy. Copyright- Fiable Pte Ltd

Copper UNS and Types of Copper

Copper UNS. Copyright- Fiable Pte Ltd

Chemical Composition Comparison

Copper types and Chemical composition. Copyright- Fiable Pte Ltd

Test requirements

Copper UNS Test Requirement. Copyright- Fiable Pte Ltd

Alloying elements and properties of copper alloys in C12200 Copper

Fiable C Series- copper return bend. Copyright- Fiable Pte Ltd

i) Phosphorus: The presence of P acts as deoxidant, by preventing hydrogen embrittlement, the copper strength and hardness is increased and weldability improved.

ii) Corrosion Resistance: Natural, industrial and maritime air, non-oxidizing acid, alkaline solution and neutral saline solution

iii) Non resistance to: sea water, oxidizing acids, ammonia, halogenide, cyanide and hydrogen sulfide solutions

iv) Application: Flexible pipes, air conditioning, heat exchanger, process equipment manufacturing

Aerial view of industrial factory. Image by chattersnap via Unsplash. Copyright- Free

Reference:

1) Copper Development Association Inc. UNS Standard Designations for Wrought and Cast Copper and Copper Alloys: Introduction. Accessed on May.16,2020. Retrieved from: https://www.copper.org/resources/standards/uns-standard-designations.html

2) Copper Development Association Inc. 1.1 Types of Copper and Properties. Accessed on May.16,2020. Retrieved from: https://www.copper.org/applications/architecture/arch_dhb/technical-discussion/fundamentals/intro.html

3) ASTM International ASTM B68-02 Standard Specification for Seamless Copper Tube, Bright Annealed. Edition approved Oct.10,2002. Published Nov. 2002