C49260

C49260

Bismuth Brass C49260 (also known as GEM Brass) is a lead-free, free-cutting brass alloy designed as a safer alternative to traditional leaded brass, offering excellent machinability while complying with RoHS environmental standards. It is widely used in high-speed screw machine work, forging, and general applications where lead-free materials are required.


CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 58.00 63.00
Zn Remainder
Bi 0.50 1.80
Pb 0.00 0.09
Fe 0.00 0.50
Sn 0.00 0.50
Cd 0.00 0.001
P 0.05 0.15
Si 0.00 0.10

Mechanical Properties according To ASTM B974 C49260 (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) 0.250 0.500 57 - 25 7 - -
0.500 1.000 55 - 25 10 - -
1.000 2.000 50 - 20 15 - -
2.000 4.000 45 - 15 20 - -
Hex (A/F) 0.250 0.500 57 - 25 7 - -
0.500 1.000 55 - 25 10 - -
1.000 2.000 50 - 20 15 - -
2.000 2.500 45 - 15 20 - -
Square (A/F) 0.250 0.500 57 - 25 7 - -
0.500 1.000 55 - 25 10 - -
1.000 2.000 50 - 20 15 - -
2.000 2.350 45 - 15 20 - -
Octagon (A/F) 0.250 0.500 57 - 25 7 - -
0.500 1.000 55 - 25 10 - -
1.000 2.000 50 - 20 15 - -
2.000 4.000 45 - 15 20 - -
Rectangle Thickness 0.250 0.500 50 - 25 10 - -
Width 0.500 1.000
Thickness 0.250 0.500 45 - 17 15 - -
Width 1.000 3.000
Thickness 0.500 2.000 45 - 17 15 - -
Width 0.500 2.000
Thickness 0.500 2.000 40 - 15 20 - -
Width 2.000 3.000
Range (mm) From To UTS Min (MPa) UTS Max (MPa) PS Min (MPa) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 6 12 395 - 170 7 - -
12 25 380 - 170 10 - -
25 50 345 - 140 15 - -
50 100 310 - 105 20 - -
Hex (A/F) 6 12 395 - 170 7 - -
12 25 380 - 170 10 - -
25 50 345 - 140 15 - -
50 100 310 - 105 20 - -
Square (A/F) 6 12 395 - 170 7 - -
12 25 380 - 170 10 - -
25 50 345 - 140 15 - -
50 100 310 - 105 20 - -
Octagon (A/F) 6 12 395 - 170 7 - -
12 25 380 - 170 10 - -
25 50 345 - 140 15 - -
50 100 310 - 105 20 - -
Rectangle Thickness 6 12 345 - 170 10 - -
Width 6 25
Thickness 6 12 310 - 1115 15 - -
Width 25 100
Thickness 12 50 310 - 115 15 - -
Width 25 50
Thickness 12 50 275 - 105 20 - -
Width 50 100

PHYSICAL PROPERTIES
Melting Point (Liquidus) 1670 °F (≈ 910 °C)
Machinability 90% (Where C36000 free cutting brass is 100%)
Electrical Conductivity 21.7% IACS at 20°C or 68 °F
Thermal Conductivity 109W/m at at 20°C or 68 °F
FABRICATION PROPERTIES
Technique Suitability
Forgeability Rating Good
Cold working Fair
Hot working Fair
Soldering Good
Brazing Good
Welding Fair

TYPICAL USES
  • Plumbing
  • Sanitary
  • Electrical
  • Electronic
  • Automotive
  • Industrial