Typical Applications High strength and wear-resistant parts: screws, nuts, copper sleeves, sealing rings, etc Corrosion resistant parts: pump accessories, bolts, nuts, propellers, valves, etc< Br/> Automotive industry: valve guides, valve seats, transmission gears, etc Petroleum industry: valve stems, pump shafts, sealing rings, etc Other application areas: bearings, shaft sleeves, gears, camshafts, etc
Chemical composition

Copper Cu	Margin	Wt%
Aluminum Al	10-11.5	Wt%
Iron Fe	5.0~6.5	Wt%
Nickel Ni	5.0~6.5	Wt%
Manganese Mn	≤ 0.5	Wt%
Phosphorus P	≤ 0.1	Wt%
Zinc	≤ 0.6	Wt%
Tin Sn	≤ 0.2
Silicon Si	≤ 0.2

Physical performance

Melting point	1050	° C
Density	7.6	g/cm3
Conductivity	7	% IACS
Thermal conductivity k	39	W/m/k
Thermal expansion coefficient	16.2	μ M/m/° C
Elastic modulus	120	Gpa

Mechanical properties

Status	Bar specification (mm)	Tensile strength (MPa)	Yield strength (MPa)	Elongation rate (%)	Hardness (HRB)
R730	Φ 7-100	≥ 730	≥ 400	≥ 6	≥ 180
R820	Φ 7-100	≥ 820	≥ 540	/	≥ 200