Chemical Composition
AS2738.2-1984
| Copper |
Iron |
Lead |
Zinc |
| 89.0 – 91.0% |
0.05% max |
0.02% max |
balance (~10%) |
| 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?¹.cm?¹ @ 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
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.
|
