C28500
DESCRIPTION
C28500 is a lead free material which is however quite suitable for machining due to its structural constitution. C28500 can be therefore 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 |
57.00 |
59.00 |
| Pb |
- |
0.25 |
| Fe |
- |
0.35 |
| Total Others |
- |
0.90 |
| Zn |
Remainder |
MECHANICAL PROPERTIES ACCORDING TO ASTM B927 (AS PER TEMPER HO2)
| Range (Inch) |
From |
To |
UTS Min (Ksi) |
PS Min (Ksi) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
0.059 |
0.500 |
69 |
43 |
8 |
- |
- |
| 0.500 |
1.000 |
65 |
36 |
12 |
- |
- |
| 1.000 |
2.953 |
59 |
26 |
16 |
- |
- |
| Hexagon (A/F) |
0.118 |
0.500 |
69 |
43 |
8 |
- |
- |
| 0.500 |
1.000 |
65 |
36 |
12 |
- |
- |
| 1.000 |
2.756 |
59 |
26 |
16 |
- |
- |
| Square (A/F) |
0.118 |
0.500 |
69 |
43 |
8 |
- |
- |
| 0.500 |
1.000 |
65 |
36 |
12 |
- |
- |
| 1.000 |
2.362 |
59 |
26 |
16 |
- |
- |
| Rectangle (Thickness) |
0.118 |
0.500 |
69 |
43 |
8 |
- |
- |
| 0.500 |
1.000 |
65 |
36 |
12 |
- |
- |
| 1.000 |
1.969 |
59 |
26 |
16 |
- |
- |
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
12 |
480 |
300 |
8 |
- |
- |
| 12 |
25 |
450 |
250 |
12 |
- |
- |
| 25 |
75 |
410 |
180 |
18 |
- |
- |
| Hex (A/F) |
3 |
12 |
480 |
300 |
18 |
- |
- |
| 12 |
25 |
450 |
250 |
12 |
- |
- |
| 25 |
70 |
410 |
180 |
18 |
- |
- |
| Square (A/F) |
3 |
12 |
480 |
300 |
8 |
- |
- |
| 12 |
25 |
450 |
250 |
12 |
- |
- |
| 25 |
50 |
410 |
180 |
18 |
- |
- |
| Rectangle (Thickness) |
3 |
12 |
480 |
300 |
8 |
- |
- |
| 12 |
25 |
450 |
250 |
12 |
- |
- |
| 25 |
50 |
410 |
180 |
18 |
- |
- |
| PHYSICAL PROPERTIES |
| Melting Point - Liquidus°F |
1650 |
| Melting Point - Solidus°F |
1630 |
| Densitylb/cu in. at 68°F |
0.303 |
| Specific Gravity |
8.39 |
| Electrical Conductivity% IACS at 68°F |
29 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F |
58 |
| Coefficient of Thermal Expansion 68-21210⁻⁶ per °F (68 – 212°F) |
11 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) |
121 |
| Specific Heat CapacityBtu/ lb /°F at 68°F |
0.09 |
| Modulus of Elasticity in Tensionksi |
12300 |
| 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 |
100 |
| Machinability Rating |
60 |
