bedra62300

Aluminum Bronze

Characteristics:

bedra62300 is a copper-aluminum-iron ternary alloy that achieves higher strength and wear resistance through aluminum solid solution strengthening. Additionally, due to the formation of a dense aluminum oxide protective layer on the alloy surface, it exhibits enhanced high-temperature corrosion and oxidation resistance under atmospheric, freshwater, and seawater conditions. The alloy also offers good spark resistance, excellent hot workability, and can be welded using arc or gas welding methods, although it is not suitable for brazing.

Typical applications:

It is widely used as bolts, nuts, bearing races, bearings, bushings, gears, pump parts, valve guides, valve seats, valve bodies, and marine hardware.

Standardization and composition

UNS	C62300
EN	/
JIS	/
GB	T61720 (QAl9-4)
Cu	Balance %
Al	8.0-10.0 %
Fe	2.0-4.0 %
Mn	≤0.5 %
Ni	≤1.0 %
Sn	≤0.1 %

Physical properties①

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

Density (g/cm³)	7.66
Electrical conductivity (%IACS)	12
Thermal conductivity (W / m x K)	54
Coefficient of thermal expansion② (10-6/K)	15.6
Modulus of elasticity (GPa)	117

Fabrication Properties

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

Capacity for being cold worked	Good
Capacity for being hot formed	Good
Brazing	Fair
Resistance welding	Good
Forgeability rating ③	75%
Machinability rating ④	50%

Mechanical Properties⑤

Note⑤：bedra technical standards

Temper	Diameter (mm)	Tensile Strength (MPa min.)	Yield Strength (MPa min.)	Elongation (A% min.)
H04	4.0≤Φ≤50	550	320	11
M30	50≤Φ≤120	540	280	17

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 max)	Length (mm. max.)	Straightness (mm/m max.)
4.0≤Ф≤10	0.12	0.06	4000	1.0
10＜Ф≤18	0.16	0.08	4000	1.0
18＜Ф≤50	0.20	0.10	4000	1.0
50＜Ф≤60	0.30	0.15	4000	1.0
60＜Ф≤70	0.30	0.15	4000	3.0
70＜Ф≤90	1.20	0.60	3000	3.0
90＜Ф≤120	2.00	0.80	2000	5.0