C2800 is a lead free material which is however quite suitable for machining due to its structural constitution. C2800 can be used as a cost-effective replacement for conventional lead-containing machining brass provided that it must not meet high requirements as regards mechanical properties and corrosion resistance.
CHEMICAL COMPOSITION
| Elements |
Min (%) |
Max (%) |
| Cu |
59.00 |
63.00 |
| Pb |
– |
0.10 |
| Fe |
– |
0.07 |
| Zn |
Remainder |
MECHANICAL PROPERTIES ACCORDING TO JIS 2800 (AS PER TEMPER BD)
| Range (mm) |
From |
To |
UTS Min (Mpa) |
PS Min |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
75 |
375 |
– |
10 |
– |
– |
| Hex (A/F) |
3 |
70 |
375 |
– |
10 |
– |
– |
| Square (A/F) |
3 |
60 |
375 |
– |
10 |
– |
– |
| Rectangle (Thickness) |
3 |
50 |
375 |
– |
10 |
– |
– |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus°F |
1660 |
| Melting Point – Solidus°F |
1650 |
| Density lb/cu in. at 68°F |
0.303 |
| Specific Gravity |
8.39 |
| Electrical Conductivity % IACS at 68°F |
28 |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F |
71 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) |
11.6 |
| Specific Heat Capacity Btu/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tension ksi |
15000 |
| Modulus of Rigidity ksi |
5600 |
| FABRICATION PROPERTIES |
| Technique |
Suitability |
| Soldering |
Excellent |
| Brazing |
Excellent |
| Oxyacetylene Welding |
Good |
| Gas Shielded Arc Welding |
Fair |
| Coated Metal Arc Welding |
Not Recommended |
| Spot Weld |
Good |
| Seam Weld |
Not Recommended |
| Butt Weld |
Good |
| Capacity for Being Cold Worked |
Fair |
| Capacity for Being Hot Formed |
Excellent |
| Forgeability Rating |
90 |
| Machinability Rating |
40 |
TYPICAL USE
- Architecture
- Builders Hardware
- Fasteners
- Industrial
