Copper Alloys 90/10 Gilding Metal Copper Alloy 220 UNS-C22000

 Product Data Sheet  Copper Alloys

90/10 Gilding Metal Copper Alloy 220   UNS-C22000

Chemical Composition

AS2738.2-1984

Copper Iron Lead Zinc
89.0 – 91.0% 0.05% max 0.02% max balance (~10%)

 Equivalent Alloy Specifications

Specification Designation
UNS
C22000
BSI
CZ101
ISO
Cu Zn 10
JIS
C 2200
SAE
CA220

 Australian Product Specifications

Specification Product Form
AS1566 Rolled Flat Products
AS1567 Wrought Bars & Sections

ASTM Product Specifications

Other product specifications available on enquiry
Number Title
B36
Brass Plate, Sheet, Strip and Rolled Bar
B130
Commercial Bronze Strip for Bullet Jackets
B131
Copper Alloy Bullet Jacket Cups
B134
Brass Wire
B135
Seamless Brass Tube
B372
Seamless Copper and Copper Alloy Rectangular Waveguide Tube
B587
Welded Brass Tube
B694
Copper, Copper Alloy and Copper Clad Stainless Steel (CCS) and Copper Clad Alloy Steel (CAS) and Strip for Electrical Cable Shielding

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)
Good
Resistance Welding (Seam)
Good
Fabrication Technique Suitability
Capacity for Being Cold Worked
Excellent
Capacity for Being Hot Worked
Excellent
Hot Working Temperature
750 – 875 °C
Annealing Temperature
425 – 800 °C
Stress Relieving Temperature
250 – 300 °C
Machinability Rating
20% of free cutting brass
Polishing/Electroplating Finish
Excellent

Mechanical Properties

AS1566, Rolled Flat Products and AS1567 Wrought Rods, Bars & Sections
Product
Temper
Tensile Strength Minimum
Elongation Minimum
Hardness
MPa
%
HV
Sheet & Flats
Annealed
80 Maximum
Sheet & Flats <= 2.0mm
1/2 Hard
310
7
95-115
Sheet & Flats 2.1-3.2mm
1/2 Hard
280
7
85-110
Rod & Square Bar >6mm
M
280
24
Sheet & Flats <= 2.0mm
Hard
360
3
110-135
Sheet & Flats 2.1-3.2mm
Hard
320
3
100-125

Available Forms Austral Wright Metals can supply this alloy as sheet, strip and round bar.

General Description C22000 combines a rich golden colour with the best combination of strength, ductility and corrosion resistance of the plain copper-zinc alloys. It weathers to a rich bronze colour, and can be supplied in pre-patinated colours ranging from deep brown to green.
It has a lower rate of work hardening than the copper-zinc alloys with higher zinc content, such as 260 and 272. This is an advantage in multistage pressing applications without interstage annealing. It has excellent deep drawing characteristics and resistance to pitting corrosion when exposed to severe weather and water environments.

Typical applications. Architectural fascias, grillwork, jewellery, ornamental trim, vitreous enamel base, badges, door handles, escutcheons, marine hardware, munitions, primer caps, rotating bands, metallic bellows, pen, pencil and lipstick tubes etc.

Physical Properties

Property
Metric Units
Imperial Units
Melting Point (Liquidus)
1045°C
1910°F
Melting Point (Solidus)
1020°C
1870°F
Density
8.80 gm/cm³ @ 20°C
0.318 lb/in³ @ 68°F
Specific Gravity
8.80
8.80
Coefficient of Thermal Expansion
18.4 x 10 -6 / °C (20-300°C)
10.2 x 10 -6 / °F (68-392°F)
Themal Conductivity
189 W/m. °K @ 20°C
109 BTU/ft³/ft/hr/°F @ 68°F
Thermal Capacity (Specific Heat)
376 J/kg. °K @ 20°C
0.09 BTU/lb/°F @ 68°F
Electrical Conductivity
0.255 microhm.cm @ 20°C
44% IACS
Electrical Resistivity
3.92 microhm.cm @ 20°C
10.3 ohms (circ mil/ft) @ 68°F
Modulus of Elasticity (tension)
115 GPa @ 20°C
17 x 10 6 psi @ 68°F
Modulus of Rigidity (torsion)
44 GPa @ 20°C
6.4 x 10 6 psi @ 68°F
Poisson’s Ratio
0.33
0.33

Phase Diagram & Mechanical Properties

Copper Alloys 90/10 Gilding Metal Copper Alloy 220 UNS-C22000 Properties

Corrosion Resistance

As an alpha brass with low zinc content, C22000 has excellent corrosion in most media. It is less susceptible to stress corrosion cracking than the higher zinc brasses such as 70/30 brass C26000, and is not considered susceptible in marine atmospheres. However, it should not be used in contact with aqueous ammonia and amines.

C22000 should not be used with acetic acid, acetylene, brines, calcium chloride, moist chlorine, chromic acid, hydrochloric acid, mercury or its compounds, nitric acid and sodium hypochlorite.

Please consult Austral Wright Metals for advice on 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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