Home / Copper grades / C12200
C12200 Phosphorus deoxidized copper, high residual
DHP, C122. Pure coppers. Tube, pipe and fabricated parts that get brazed or welded. Standard plumbing and refrigeration copper.
Specification
- UNS
- C12200
- Conductivity
- 85 percent IACS
- Machinability
- 20 (C36000 = 100)
- Specification
- ASTM B152 (sheet, strip, plate), ASTM B75 (tube), ASTM B42 (pipe)
- Usual temper
- O60 annealed, or H55 light drawn for tube
Published typical values for the alloy, not a promise from any shop. Where these numbers come from.
How it machines
Cuts like the other pure coppers. The phosphorus is there for weldability, not for chip control, so expect the same burrs and the same tooling rules. Mostly encountered as tube and fabricated parts rather than bar stock.
Watch out. The phosphorus that makes it weldable costs you about 15 points of conductivity. Do not use it where the electrical number matters.
Typical parts
- Tube and pipe assemblies
- Brazed manifolds and fittings
- Refrigeration and plumbing components
- Fabricated parts that are welded
When not to specify it
Do not use it as a conductor when the electrical number matters. The deoxidant costs about 15 points of IACS against C11000, which is a real loss on a busbar or a contact.
Drawing callout
Replace the bracket with the ASTM specification for your product form. The RFQ builder does this for you and adds edge, finish and plating lines.
Phosphorus deoxidized copper, high residual, UNS C12200, [ASTM spec for your product form], temper O60 annealed
Other pure coppers
Above 99.9 percent copper. You specify these when a conductivity, thermal or vacuum number is on the print, and you pay for them in machining time.
- C10100
Oxygen free electronic copperUltra high vacuum parts, hydrogen brazed assemblies, sinker EDM electrodes, RF and cryogenic components. - C10200
Oxygen free copperOxygen free work that does not need the tighter purity control of C10100. - C11000
Electrolytic tough pitch copperThe default electrical copper. Busbars, terminals, lugs, contact blocks, cold plates, heat sinks.