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C36000
C36000
UNS C36000 (standardized under ASTM B16) is the global benchmark material against which the machinability of all other copper alloys is measured (Machinability Rating: 100%). Commonly referred to as 360 Brass or Free-Cutting Brass, it is formulated with 60%–63% copper and 2.5%–3.7% lead. This metallurgical balance provides high-speed cutting capability, natural lubrication at the tool edge, and fine chip fragmentation for automatic screw and CNC machine operations.
Chemical Composition
Elements |
Min (%) |
Max (%) |
Cu |
60.00 |
63.00 |
Pb |
2.50 |
3.00 |
Fe |
– |
0.35 |
Total others |
– |
0.50 |
Zn |
Remainder |
|
Mechanical Properties According To ASTM B16 (As Per Temper HO2)
Range (Inch) |
From |
To |
UTS Min (ksi) |
UTS Max (ksi) |
PS Min (ksi) |
Elongation Min (%) |
Hardness Min (HRB) |
Hardness Max (HRB) |
|
| Round (Dia) | 0.0590 |
0.500 |
57 |
80 |
25 |
7 |
– |
– |
|
0.500 |
1.000 |
55 |
70 |
25 |
10 |
60 |
80 |
||
1.000 |
2.000 |
50 |
60 |
20 |
15 |
50 |
75 |
||
2.000 |
2.957 |
50 |
60 |
20 |
15 |
40 |
70 |
||
| Hex (A/F) | 0.118 |
0.500 |
57 |
80 |
25 |
7 |
– |
– |
|
0.500 |
1.000 |
55 |
70 |
25 |
10 |
60 |
80 |
||
1.000 |
2.000 |
50 |
60 |
20 |
15 |
50 |
75 |
||
2.000 |
2.756 |
50 |
60 |
20 |
15 |
40 |
70 |
||
| Square (A/F) | 0.118 |
0.500 |
57 |
80 |
25 |
7 |
– |
– |
|
0.500 |
1.000 |
55 |
70 |
25 |
10 |
60 |
80 |
||
1.000 |
2.000 |
50 |
60 |
20 |
15 |
50 |
75 |
||
2.000 |
2.362 |
50 |
60 |
20 |
15 |
40 |
70 |
||
| Octagon (A/F) | 0.118 |
0.500 |
57 |
80 |
25 |
7 |
– |
– |
|
0.500 |
1.000 |
55 |
70 |
25 |
10 |
60 |
80 |
||
1.000 |
2.000 |
50 |
60 |
20 |
15 |
50 |
75 |
||
2.000 |
2.362 |
50 |
60 |
20 |
15 |
40 |
70 |
||
| Rectangle | Thickness | 0.118 |
0.500 |
50 |
– |
25 |
10 |
– |
– |
| Width | 0.118 |
0.500 |
|||||||
| Thickness | 0.500 |
1.000 |
45 |
– |
17 |
15 |
45 |
85 |
|
| Width | 0.500 |
1.000 |
|||||||
| Thickness | 1.000 |
2.000 |
40 |
– |
15 |
20 |
40 |
80 |
|
| Width | 1.000 |
2.756 |
|||||||
PHYSICAL PROPERTIES |
|
| Melting Point – Liquidus°F | 1650 |
| Melting Point – Solidus°F | 1630 |
| Densitylb/cu in. at 68°F | 0.307 |
| Specific Gravity | 8.5 |
| Electrical Conductivity% IACS at 68°F | 26 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.4 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tensionksi | 14000 |
| Modulus of Rigidityksi | 5300 |
FABRICATION PROPERTIES |
|
| Melting Point – Liquidus°F | 1650 |
| Melting Point – Solidus°F | 1630 |
| Densitylb/cu in. at 68°F | 0.307 |
| Specific Gravity | 8.5 |
| Electrical Conductivity% IACS at 68°F | 26 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 67 |
| Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) | 11.4 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
| Modulus of Elasticity in Tensionksi | 14000 |
| Modulus of Rigidityksi | 5300 |
| Machinability Rating | 100 |
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