bedra62200

Aluminum Bronze

Characteristics：

bedra62200 is a special high-strength bronze, the addition of iron and nickel enhances strength and corrosion resistance, while the increased aluminum content forms a hard beta phase in the microstructure, improving overall strength and hardness. This alloy uniquely combines high strength, good fatigue resistance, excellent wear and abrasion resistance, along with oxidation resistance and corrosion resistance in seawater and other aggressive environments. It also maintains high strength at elevated temperatures.

Typical applications:

It is widely used in marine hardware, including gears, bearings, bushings, bearing races, pump parts, valve bodies, and also components of plastic injection molds.

Standardization and composition

UNS	/
EN	CuAl11Ni6Fe6 (CW308G)
JIS	/
GB	T62200 9 (QAl11-6-6)
Cu	balance
Al	10.0-11.5%
Fe	5.0-6.5%
Ni	5.0-6.5%
Mn	≤ 0.50%
Zn	≤ 0.60%
Sn	≤ 0.20%
Pb	≤ 0.05%
Si	≤ 0.20%

Physical properties①

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

Density (g/cm³)	7.6
Metling temperature (℃)	1054
Electrical conductivity (%IACS)	7
Thermal conductivity (W / m x K)	39.1
Coefficient of thermal expansion② (10-6/K)	15.6
Modulus of elasticity (GPa)	121

Fabrication Properties

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

Cold workability	Poor
Hot workability	Good
Brazing	Fair
Resistance welding	Good
Forgeability rating ③	75%
Machinability rating ④	30%

Mechanical Properties⑤

Note⑤：bedra technical standards

Temper	Diameter (mm)	Tensile Strength (MPa min.)	Yield Strength (MPa min.)	Elongation (% min.)	Hardness (HBW min.)
R740	10≤Φ≤120	740	420	5	170
R830	10≤Φ≤80	830	550	/	200

Dimension Tolerance and Delivery Form

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
Diameter (mm)	Tolerance⑥ (mm)	Ovality (mm)	Length (mm. max.)	Straightness (mm/m max.)
10 ≤ Φ 18	0.16	0.08	3600	1.0
18 ≤ Φ 50	0.30	0.15	4000	1.0
50 ≤ Φ 60	0.40	0.20	4000	1.0
60 ≤ Φ 70	0.80	0.40	3000	3.0
70 ≤ Φ 90	1.20	0.60	4000	3.0
90 ≤ Φ ≤ 120	2.00	1.00	2000	5.0