bedra49260

Bismuth Brass

Characteristics:

By replacing the lead element with bismuth, the material not only ensures excellent machinability but is also environmentally friendly. It possesses outstanding mechanical and electrical properties, making it an ideal substitute for leaded brass. The alloy is strictly lead-free according to RoHS.

Typical applications:

This alloy is widely used in TWS earphones, CMOS lens components, electronic products, hardware, connectors, valve cores, and food processing machinery.

Standardization and composition

UNS	C49260
EN	/
JIS	C6801
GB	C49260 (HBi60-1-0.05)
Cu	58.0-63.0 %
Pb	≤ 0.009 %
Bi	0.50-1.8 %
P	0.05-0.15 %
Zn	Balance %

Physical properties①

Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.

Density (g/cm³)	8.9
Metling temperature (℃)	884
Electrical conductivity (%IACS)	21.7
Thermal conductivity (W / m x K)	79
Coefficient of thermal expansion② (10-6/K)	17.5
Modulus of elasticity (GPa)	108.9

Fabrication Properties

Note③：C37700 = 100% Note④：C36000 = 100%

Capacity for being cold worked	Fair
Capacity for being hot formed	Fair
Brazing	Good
Forgeability rating ③	70%
Machinability rating ④	80%

Mechanical Properties⑤

Note⑤：bedra technical standard

Temper	Diameter (mm)	Tensile Strength (MPa min.)	Yield Strength (MPa min.)	Elongation (A% min.)
H02	1.5≤Φ＜25	420	170	7
H02	25≤Φ＜80	390	140	10
H04	1.5≤Φ≤12	500	350	4

Dimension Tolerance and Delivery Forms

Note⑥：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.

			Straight bar		Coil wire
Diameter (mm)	Tolerance⑥ (mm)	Ovality (mm max.)	Length (mm max.)	Straightness (mm/m max.)	ID (mm)	weight (kg)
1.5≤Ф＜3.0	0.02	0.010	2500	0.5	450	100
3.0≤Ф＜6.0	0.02	0.010	3600	0.5	700	500
6.0≤Ф＜10	0.03	0.015	3600	0.5	1200	800
10≤Ф＜18	0.04	0.020	3600	0.5	1500	1000
18≤Ф＜30	0.06	0.030	4000	0.5	/	/
30≤Ф＜50	0.10	0.050	4000	0.5	/	/
50≤Ф＜60	0.15	0.075	4000	0.5	/	/
60≤Ф≤80	0.30	0.150	3000	2.0	/	/