1.Tellurium brass bars without lead with high strength and high machinability

1).Trade mark: HDT-1

Patent No. 10022245.0

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Cu      Bi                       Te       Pb  As  Cd      Zn       Total impurities

57-60  0.45-0.65  0.010-0.015   -   -     -   Allowance     Below 1.0

Main physic properties

1).Status: Semi-hardness (Y2)

2).Tensile strength: 390-420RmMpa

3).Expansion (A%): 10-16

4).Hardness(HBS): 115

5).Machinability rating: 85%

Remarks: Pb below 0.006%

Usage: It is used for the manufacture of complex high precision parts such as air-conditioner valves, metal decorations, door holder, lock, automobile parts, watch shell and water heater materials etc.

2). Trade mark: HDT-2

Patent No. 10022244.6

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Cu           Bi                  Te       Pb  As  Cd    Zn       Total impurities

57-60  0.70-0.95  0.010-0.015   -   -      -  Allowance     Below 1.0

Main physic properties

1).Status: Semi-hardness (Y2)

2).Tensile strength: 410-450RmMpa

3).Expansion (A%): 10-15

4).Hardness(HBS): 120

5).Machinability rating: 90%

Remarks: Pb below 0.006%

Usage: It is used for the manufacture of machinery, automobile parts, instrument parts, watch parts, various water pipes, connectors, gears, air bottle valves, high precision parts, bearing, bearing metal, electric connectors etc.

3). Trade mark: HDT-3

Patent No. 10022246.5

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Cu            Bi              Te           Pb  As  Cd    Zn       Total impurities

60-65  1.00-1.25  0.010-0.015   -    -    -    Allowance     Below 1.0

Main physic properties

1).Status: Semi-hardness (Y2)

2).Tensile strength: 380-420RmMpa

3).Expansion (A%): 10-14

4).Hardness(HBS): 125

5).Machinability rating: 100%

Remarks: Pb below 0.006%

Usage: It is used for the manufacture of machinery, automobile parts, instrument parts, watch parts, various water pipes, connectors, gears, air bottle valves, high precision parts, bearing, bearing metal, electric connectors etc.

2. Free-cutting phosphorus tellurium copper alloy

Trade mark: PDT

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Cu           Te          P 

99.288  0.4-0.7   0.004-0.012

Main physic properties

1).Tensile strength: 350-380RmMpa

2).Expansion (A%): 9-12

3).Hardness(HBS): 103-108

4).Machinability rating: 85%

Usage: It is used for the manufacture of various cutting nozzles, rapid connectors, electrodes and various free-cutting copper alloy parts which needs high productivity.

3.Magnesium tellurium copper alloy

Trade mark:MDT

Patent No.02133772.1

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Mg         Zn   Pb  S  Bi      Te      Cu      

0.05-0.010   -    -   -   -      0.3-0.8  Over 99.19   

Main physic properties

1).Tensile strength: 320-570RmMpa

2).Expansion (A%): 8-11

3).Hardness(HBS): 150

4).Electrical conductivity: 75-85%IACS

5).Thermal conductivity:300-330W/(m.k)

6).Corona voltage(KV): 16

7).Breakdown voltage(KV):19

Remarks: Pb below 0.006%

Usage: It is used for the manufacture of contact network wires of high-speed railroad and relative fittings.

4. Tellurium copper alloy

Trade mark:DT

Patent No.02113262.3

Specification:

1). 90mm (diameter) x 0.25-5m (length) casting round bars;

2). 5-40mm(diameter) x 0.25-5m (Length) extruding/drawing round bars & abnormal shape bars.

Main checmical compositions(%)

Te       Rare metal     Cu      

0.2-0.35   0.03-0.05  Allowance

Main physic properties

1).Status:A. Semi-hardness(Y2). B. Hardness(Y)

1).Tensile strength: 350-580RmMpa, 400-450 RmMpa

2).Expansion (A%): A. 8-11. B. 1-3

3).Hardness(HBS): 103-108

4).Electrical conductivity:99%IACS

5).Thermal conductivity:380-440W/(m.k)

6).Corona voltage(KV): 17-18

7).Breakdown voltage(KV):19-21

Usage: It is used for the manufacture of contact network wires of high-speed railroad and relative fittings.

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