Description
C28000 is a lead-free material that’s well-suited for machining due to its structural composition. It can serve as a cost-effective alternative to traditional lead-containing machining brass, provided that it doesn’t need to meet stringent requirements for mechanical properties and corrosion resistance.
Chemical Composition
Mechanical Properties According To ASTM B36 (As Per Temper HO2)
| Range (Inch) |
From |
To |
UTS Min (ksi) |
UTS Max (ksi) |
PS Min |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
| Round (Dia) |
0.059 |
2.953 |
58 |
70 |
– |
– |
52 |
80 |
| Hex (A/F) |
0.118 |
2.756 |
58 |
70 |
– |
– |
52 |
80 |
| Square (A/F) |
0.118 |
2.362 |
58 |
70 |
– |
– |
52 |
80 |
| Range (mm) |
From |
To |
UTS Min (MPa) |
UTS Max (MPa) |
PS Min |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
| Round (Dia) |
1.5 |
75 |
400 |
485 |
– |
– |
52 |
80 |
| Hex (A/F) |
3 |
70 |
400 |
485 |
– |
– |
52 |
80 |
| Square (A/F) |
3 |
60 |
400 |
485 |
– |
– |
52 |
80 |
| PHYSICAL PROPERTIES |
| Melting Point – Liquidus°F |
1660 |
| Melting Point – Solidus°F |
1650 |
| Density lb/cu in. at 68°F |
0.303 |
| 8.39 |
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 |
