bedra51900

Phosphor Bronze

Characteristics:

It is a solid solution strengthened copper alloy containing approximately 6% tin. It has a very good combination of strength and electrical conductivity. The alloy is wear-resistant, exhibits excellent corrosion resistance to seawater and industrial atmospheres, and can be readily soldered.

Typical Applications:

It can be used in bearing applications working under medium to high loads and sliding speeds, such as washers, bearings, bushings, and turbine parts. It can also be used as electrical connectors and other elastic parts, such as springs and reeds.

Standardization and composition

UNS	C51900
EN	CuSn6 (CW452K)
JIS	C5191
GB	T51530 (QSn7-0.2)
Cu	balance
Sn	5.0-7.0%
P	0.03-0.35%
Pb	≤ 0.05 %
Fe	≤ 0.10%
Ni	≤ 0.30%

Physical properties①

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

Density (g/cm³)	8.83
Metling temperature (℃)	1038
Electrical conductivity (%IACS)	14
Thermal conductivity (W / m x K)	66
Coefficient of thermal expansion② (10-6/K)	17.3
Modulus of elasticity (GPa)	110.3

Fabrication Properties

Note③：C36000 = 100%

Cold workability	Excellent
Hot workability	Poor
Brazing	Excellent
Resistance welding	Good
Machinability rating ③	20%

Mechanical Properties④

Note④：bedra technical standards

Temper	Diameter (mm)	Tensile Strength (MPa)	Yield Strength (MPa min.)	Elongation (% min.)	Hardness(HBW min.)
H04	20≤Φ≤50	440	/	19	130-200
H04	50＜Φ≤100	400	/	19	/

Dimension Tolerance and Delivery Form

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
Diameter (mm)	Tolerance⑤ (mm)	Ovality (mm)	Length (mm. max.)	Straightness (mm/m max.)
20 ≤ Φ 30	0.17	0.09	3000	2.0
30 ≤ Φ 50	0.20	0.10	3000	3.0
50 ≤ Φ 80	0.37	0.20	3000	4.0
80 ≤ Φ ≤ 100	0.50	0.25	2000	4.0