C36500

FLB, Section brass, is a readily extrudable leaded alpha/beta brass with a small aluminium addition, which gives a bright golden colour. The lead gives free cutting properties. FLB is available as extruded rods and flats which are typically used in builders’ hardware.

Chemical Composition

Elements Min (%) Max (%)
Cu 58.00 61.00
Pb 0.25 0.70
Fe – 0.15
Total Others – 0.40
Zn Remainder

Mechanical properties according to ASTM B981 (As per temper HO2)

Range (inch) UTS Min
(ksi)
UTS Max
(ksi)
PS Min
(ksi)
Elongation Min
(%)
Hardness
Hardness Min
(HRB)
Hardness Max
(HRB)
Round (Dia) 0.059 – 0.500 63 – 28 10 – –
0.500 – 1.000 55 – 26 12 – –
1.000 – 2.000 48 – 24 20 – –
2.000 – 2.952 45 – 20 25 – –
Hex (A/F) 0.118 – 0.500 63 – 28 10 – –
0.500 – 1.000 55 – 26 12 – –
1.000 – 2.000 48 – 20 25 – –
2.000 – 2.756 45 – 20 25 – –
Square (A/F) 0.118 – 0.500 63 – 28 10 – –
0.500 – 1.000 55 – 26 12 – –
1.000 – 2.000 48 – 24 20 – –
2.000 – 2.362 45 – 20 25 – –
Octagon (A/F) 0.118 – 0.500 63 – 28 10 – –
0.500 – 1.000 55 – 26 12 – –
1.000 – 2.000 48 – 20 25 – –
2.000 – 2.362 45 – 20 25 – –

 

Range (inch) UTS Min
(ksi)
UTS Max
(ksi)
PS Min
(ksi)
Elongation Min
(%)
Hardness
Hardness Min
(HRB)
Hardness Max
(HRB)
Round (Dia) 1.5 – 12 430 – 190 10 – –
12 – 25 380 – 180 12 – –
25 – 50 330 – 165 20 – –
50 – 75 310 – 135 25 – –
Hex (A/F) 3 – 12 430 – 190 10 – –
12 – 25 380 – 180 12 – –
25 – 50 330 – 165 20 – –
50 – 70 310 – 135 25 – –
Square (A/F) 3 – 12 430 – 190 10 – –
12 – 25 380 – 180 12 – –
25 – 50 330 – 165 20 – –
50 – 60 310 – 135 25 – –

PHYSICAL PROPERTIES
Melting Point – Liquidus °F 1650
Melting Point – Solidus °F 1630
Density lb/cu in at 68°F 0.304
Specific Gravity 8.41
Electrical Conductivity %IACS at 68°F 28
Thermal Conductivity BTU/ sq ft/ ft hr/ °F at 68°F 71
Coefficient of Thermal Expansion 68-572 10⁻⁶ per °F (68–572°F) 11.6
Specific Heat 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 Good
Oxyacetylene Welding Fair
Gas shielded Arc Welding Fair
Coated Metal Arc Welding Not Recommended
Spot Weld Not Recommended
Seam Weld Not Recommended
Butt Weld Fair
Capacity for Being Cold Worked Fair
– Excellent
Machinability Rating 60

Typical Uses