bedra49250

Bismuth Brass

Characteristics：

The alloy exhibits excellent turning performance comparable to that of C3604, as well as superior riveting and hot forging capabilities. Additionally, it possesses outstanding mechanical and electrical properties, making it an ideal material to replace lead brass. The alloy is strictly lead-free according to RoHS and ELV.

Typical applications:

Primarily serving as a lead-free substitute for leaded brass, this alloy finds extensive applications in e-cigarettes, connectors, valve cores, embedded nuts, smart charging systems, coffee pot components, consumer electronics, hardware, machinery, construction equipment, 5G accessories, and more.

Standardization and composition

UNS	C49250
EN	/
JIS	C6801
GB	T49240 (HBi60-1.3) T49360 (HBi59-1) T49210 (HBi58-1.5)
Cu	57.0-64.0 %
Pb	＜ 0.009 %
Bi	0.5-4.0 %
Sn	0.05-1.2 %
Zn	Balance %

Physical properties①

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

Density (g/cm³)	8.41
Electrical conductivity (%IACS)	24
Thermal conductivity (W / m x K)	96
Coefficient of thermal expansion② (10-6/K)	18.9
Modulus of elasticity (GPa)	100.7

Fabrication Properties

Note③：C36000 = 100%

Capacity for being cold worked	Fair
Capacity for being hot formed	Fair
Brazing	Good
Resistance welding	Not recommended
Forgeability	Good
Machinability rating③	95%

Mechanical Properties④

Note④：bedra technical standards

Temper	Diameter (mm)	Tensile Strength (MPa min.)	Yield Strength (MPa min.)	Elongation (A% min.)	Hardness (HV5 min.)
H02	Ф ＜ 3.0	420	170	2	120
H02	3 ≤ Ф ＜ 25	420	170	7	120
H02	25 ≤ Ф ＜ 80	390	140	15	100
H04	Ф ＜ 3.0	500	350	1	140
H04	3.0 ≤ Ф ≤ 12	500	350	5	140

Dimension Tolerance and Delivery Forms

Note⑤：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
Diamter (mm)	Tolerance⑤ (mm)	Ovality (mm max.)	Length (mm. max.)	Straightness (mm/m max.)	ID (mm)	Weight(kg）
1.5 ≤ Ф ＜3.0	0.02	0.010	3600	0.5	500	50
3.0 ≤ Ф ＜6.0	0.02	0.010	3600	0.5	800	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 ＜25	0.06	0.030	4000	0.5	/	/
25 ≤ Ф ＜40	0.10	0.050	4000	0.5	/	/
40 ≤ Ф ＜60	0.15	0.075	4000	0.5	/	/
60 ≤ Ф ≤ 80	0.30	0.150	3000	2.0	/	/