Phosphorus Deoxidised Copper Alloy 122 UNS-C12200

Product Data Sheet   Copper Alloys

Phosphorus Deoxidised Copper Alloy 122   UNS-C12200

High Residual Phosphorus Alloy

Chemical Composition

AS2738.2 – 1984, Compositions & Designations

Copper (including silver) Phosphorus
> 99.90% 0.015 – 0.040%

Equivalent Alloy Specifications

Specification Designation
UNS
C12200
BSI
C106
ISO
Cu-DHP
JIS
C1220

Australian Product Specifications

Specification Product Form
AS1432 Copper Tubes for Water, Gas & Sanitation
AS1566 Rolled Flat Products
AS1567 Wrought Bars & Sections
AS1572 Seamless Tubes for Engineering Purposes

ASTM Product Specifications

Specification Title
B5
High Conductivity Tough Pitch Copper Refinery Shapes
B42
Seamless Copper Pipe, Standard Sizes
B68
Seamless Copper Tube, Bright Annealed
B75
Seamless Copper Tube
B88
Seamless Copper Water Tube
B111
Copper and Copper Alloy Seamless Condenser Tubes and Ferrule Stock
B152
Copper Sheet, Strip, Plate and Rolled Bar
B187
Copper Bar, Bus Bar, Rod and Shapes
B280
Seamless Copper Tube for Air Conditioning and Refrigeration Field Service
B302
Threadless Copper Pipe
B306
Copper Drainage Tube (DWV)
B359
Copper and Copper Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins
B360
Hard Drawn Copper Capillary Tube for Restrictor Applications
B379
Phosphorized Coppers – Refinery Shapes
B395
U Bend Seamless Copper and Copper Alloy Heat Exchanger and Condenser Tubes
B447
Welded Copper Tube
B543
Welded Copper and Copper Alloy Heat Exchanger Tube
B577
Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
B640
Welded Copper and Copper Alloy Tube for Air Conditioning and Refrigeration Service
B698
Seamless Copper and Copper Alloy Plumbing Pipe and Tube
B743
Seamless Copper Tube in Coils
B837
Seamless Copper Tube for Natural Gas and Liquified Petroleum (LP) Gas Fuel Distribution Systems

Fabrication Properties

Joining Technique Suitability
Soldering
Excellent
Brazing
Excellent
Oxy Acetylene Welding
Good
Gas Shielded Arc Welding
Good
Coated Metal Arc Welding
Not Recommended
Resistance Welding – Spot
Fair
Resistance Welding – Seam
Fair
Fabrication Technique Suitability
Capacity for Being Cold Worked
Excellent
Capacity for Being Hot Worked
Good
Hot Working Temperature
750 – 950 °C
Annealing Temperature
250 – 650 °C
Stress Relieving Temperature
200 – 250 °C
Machinability Rating
20% of free cutting brass
Polishing/Electroplating Finish
Excellent

Mechanical Properties

AS1567, Wrought Rods, Bars & Sections

Temper Thickness Grain Size
Minimum Tensile Strength
Minimum Elongation
Maximum Hardness
Product mm mm
MPa
%
HV
Plate & Rolled Bar
Annealed, M or O
3.2 – 60.0
210
35
50*
Hard
3.2 – 12.0
280
15
85*
Sheet, Strip & Foil
Annealed, O4
0.025 – 0.045
220*
45*
60
1/2 Hard
0.15 – 3.2
245
10
75 – 90
Hard
0.15 – 3.2
310
7
90 – 115

* = Typical

Available Forms Austral Wright Metals are able to supply this alloy as sheet, strip & tube.

General Description C12200, Phosphorus deoxidised copper, has been made weldable and brazeable by deoxidising with phosphorus. It is widely used as flat products and tubing, especially where it is to be welded or brazed. Phosphorus significantly reduces the conductivity, which may go as low as 70% IACS, but also raises the softening temperature when work hardened and promotes fine grain size.

C12200 has almost exactly the same mechanical properties as the high purity copper alloys such as C11000. It has excellent deep drawing characteristics and resistance to pitting corrosion when exposed to severe weather and water environments.

Typical applications Tubes for hot & cold water, gas & heating installations, soil & waste pipes, storage tanks, cisterns & cylinders, rainwater goods, roofing, fascias, building facades, evaporators, heat exchangers, stills, vats, chemical equipment, anodes for electroplating baths.

Physical Properties

Property
Metric Units
Imperial Units
Melting Point (Liquidus)
1083°C
1981°F
Melting Point (Solidus)
1083°C
1981°F
Density
8.90 gm/cm³ @ 20°C
0.321 lb/in³ @ 68°F
Specific Gravity
8.90
8.90
Coefficient of Thermal Expansion
17.7 x 10 -6 / °C (20-300°C)
9.83 x 10 -6 / °F (68-392°F)
Themal Conductivity
293-364 W/m. °K @ 20°C
169-211 BTU/ft³/ft/hr/°F @ 68°F
Thermal Capacity (Specific Heat)
385 J/kg. °K @ 20°C
0.092 BTU/lb/°F @ 68°F
Electrical Conductivity
0.41-0.52 microhm.cm @ 20°C
70-90% IACS @ 68°F
Electrical Resistivity
2.5-1.9 microhm.cm @ 20°C
15-12 ohms (circ mil/ft)@ 68°F
Modulus of Elasticity (tension)
115 GPa
17 x 10 6 psi
Modulus of Rigidity (torsion)
44 GPa
6.4 x 10 6 psi
Poisson’s Ratio
0.33
0.33

Corrosion Resistance

C12200 has similar corrosion resistance to C11000. It gives excellent resistance to weathering and very good resistance to many chemicals. It is often used specifically for corrosion resistance. It is suitable for use with most waters, and can be used underground because it resists soil corrosion. It resists non-oxidising mineral and organic acids, caustic solutions and saline solutions.

Depending on concentration and specific conditions of exposure, copper generally resists:

Acids: mineral acids such as hydrochloric and sulphuric acids; organic acids such as acetic acid (including acetates and vinegar), carbolic, citric, formic, oxalic, tartaric and fatty acids; acidic solutions containing sulphur, such as the sulphurous acid and sulphite solutions used in pulp mills.

Alkalies: fused sodium and potassium hydroxide; concentrated and dilute caustic solutions.

Salt solutions: aluminium chloride, aluminium sulphate, calcium chloride, copper sulphate, sodium carbonate, sodium nitrate, sodium sulphate, zinc sulphate.

Waters: all potable waters, many industrial and mine waters, seawater and brackish water.

Other media: The corrosion resistance of C12200 is not adequate for: ammonia, amines and ammonium salts; oxidizing acids such as chromic and nitric acids and their salts; ferric chloride; persulphates and perchlorates; mercury and mercury salts. Copper may also corrode in aerated non oxidising acids such as sulphuric and acetic acids, although it is practically immune from these acids if air is completely excluded. Copper is not suitable for use with acetylene, which can react to form an acetylide which is explosive.

Consult Austral Wright Metals for your specific application.

 

 

The technical advice and recommendations made in this Product Data Sheet should not be relied or acted upon without conducting your own further investigations, including corrosion exposure tests where needed. Please consult current editions of standards for design properties. Austral Wright Metals assumes no liability in connection with the information in this Product Data Sheet. Austral Wright Metals supplies a comprehensive range of stainless steels, copper alloys, nickel alloys and other high performance metals for challenging service conditions. Our engineers and metallurgists will be pleased to provide further data and applications advice.

 

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