Manganese white copper Bar and Rod

China

ISO

USA

Japan

France

UK

DIN

BMn3-12

MHMц13-12 

CuMn12Ni

BMn40-1-5

MHMц40-1.5

BMn43-0.5

MHMц43-1.5

CuNi44

Alloy Grade

Ni+Co

Fe

Mn

Zn

Al

Si

Mg

Pb

S

C

P

Cu

Total impurities

BMn3-12

2.0-3.5

0.20-0.50

11.5-13.5

0.2

0.1

0.3

0.03

0.02

0.02

0.05

0.005

Balance

0.5

BMn40-1.5

39.0-41.0

0.50

1.0-2.0

0.1

0.05

0.005

0.02

0.10

0.005

Balance

0.9

BMn43-0.5

42.0-44.0

0.15

0.10-1.0

0.1

0.05

0.002

0.01

0.10

0.002

Balance

0.6

Characteristics

Alloy Grade

BMn3-12Manganese Copper-Nickel Alloy

BMn40-1.5Manganese Copper-Nickel Alloy

Liquid point/℃

1011.2

Solid point/℃

961

1261.7

Density/kg·m-3

8400

8900

18℃ Specific heat capacity/J·（kg·K）-1

409.5

410.3

100℃Linear expansion coefficient/℃-1

16x10-6

14.4x10-6

Thermal conductivity（20℃）/W·（m·K）-1

21.8

20.9

Resistivity（20℃）/μΩ·m

0.435

0.480

Temperature Coefficient of Resistance/℃-1

3x10-5

2x10-5（20-100℃）

The thermoelectric potential per 1℃ when paired with copper/mV

1

Electrode potential0.35mV

Breakdown voltage of wire with diameter of 0.03-0.54mm/V

400

Elastic Modulus/GPa

126.5

166

Characteristics

Alloy Grade

BMn43-0.5Manganese Copper-Nickel Alloy

Liquidus point/℃

1291.8

Solid point/℃

1221.7

Density/kg·m-3

8900

Coefficient of linear expansion at 20℃/℃-1

14x10-6

150℃ linear expansion/mm·m-1

2

500℃ linear expansion/mm·m-1

8

Thermal conductivity（20℃）/W·（m·K）-1

24.4

0 resistivity/μΩ·m

0.49-0.50（Soft Condition）

Temperature Coefficient of Resistance at 0℃/℃-1

-0.00014

Thermoelectric potential paired with platinum at 25℃/mV

1

Elastic Modulus/GPa

95（Soft Condition）

120（Hard Condition）

Alloy grade

Main features

Application examples

BMn3-12

It is an electrical copper-nickel alloy, commonly known as manganese copper, which is characterized by high resistivity and low temperature coefficient of resistance, high long-term stability of resistance, and low conductivity to copper.

Widely used in the manufacture of resistance instruments and precision electrical measuring instruments whose working temperature is below 100°C

BMn40-1.5

It is an electrical copper-nickel alloy, usually called constantan. It has high resistivity and high thermoelectromotive force that hardly change with temperature, good heat resistance and corrosion resistance, and high mechanical properties and deformability.

To make good materials for thermocouples (below 900℃), heaters (resistance wires of electric furnaces) and varistors whose working temperature is below 500℃

BMn43-0.5

It is an electrical copper-nickel alloy, usually called a copper-tested alloy. Its characteristic is that it has the largest thermoelectromotive force in the electrical copper-nickel alloy, and has a high electrical resistivity and a very low temperature coefficient of resistance, heat resistance and corrosion resistance. It is also better than BMn401.5, and has high mechanical properties and deformability.

In the high temperature measurement, copper is widely used as the negative electrode of the compensation conductivity and thermocouple, and the electric heating instrument whose working temperature does not exceed 600℃.