Description
FLB, categorized as section brass, presents itself as an easily extrudable alloy featuring a blend of alpha and beta phases, with the infusion of a minor amount of aluminum, resulting in a distinctive bright golden shade. The incorporation of lead grants free cutting characteristics. FLB is provided in the form of extruded rods and flats, commonly employed in the realm of builders’ hardware.
Chemical Composition
| Elements | Min (%) | Max (%) |
| Cu | 56.50 | 60.00 |
| Pb | 0.60 | 2.00 |
| Fe | – | 0.30 |
| Total Others Excl Fe | – | 0.75 |
| Zn | Remainder |
Mechanical Properties According To 6912 FLB (As Per Temper HB)
| Range (mm) |
From |
To |
UTS Min (MPa) |
PS Min (MPa) |
Elongation Min (%) |
Hardness Min |
Hardness Max |
| Round (Dia) |
1.5 |
75 |
310 |
– |
25 |
– |
– |
| Hex (A/F) |
3 |
70 |
310 |
– |
25 |
– |
– |
| Square (A/F) |
3 |
60 |
310 |
– |
25 |
– |
– |
| Rectangle (Thickness) |
3 |
50 |
310 |
– |
25 |
– |
– |
| Physical Properties |
Metric |
English |
| Density |
8.40 g/cc |
0.303 lb/in3 |
| CTE, linear |
26.0 ᶙm/m-˚C |
14.4 ᶙin/in-˚F |
| Specific Heat Capacity |
0.380 J/g-˚C |
0.0908 BTU/lb-˚F |
| Thermal Conductivity |
113 W/m-K |
784 BTU-in/hr-ft²-˚F |
| Melting Point |
880-900 ˚C |
1620 – 1650 ˚F |
| Solidus |
880 ˚C |
1620 ˚F |
| Liquidus |
900 ˚C |
1650˚F |
Fabrication Properties
| Forming |
Suitability |
| Machinability (CuZn39Pb3 = 100 %) |
95.00% |
| Capacity for Being Cold Worked |
Poor |
| Capacity for Being Hot Worked |
Excellent |
