BMn43-0.5

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Product information

Model: BMn43-0.5 
BMn43-0.5 manganese white copper is a high-precision resistance alloy that combines high resistivity, low resistance temperature coefficient, excellent corrosion resistance, and good mechanical properties. It is suitable for industrial fields such as precision electrical instruments and thermocouple compensation cables. 

Resistance properties
The resistivity is stable within the range of 0.42-0.48 μΩ·m, and the temperature difference electromotive force is approximately 20% higher than that of copper-nickel.
The resistance temperature coefficient is low, ensuring the measurement accuracy of instruments and meters in the temperature range of -50°C to 200°C. 

Corrosion resistance
It exhibits excellent anti-pitting ability in chloride environments, with a chloride ion tolerance concentration of up to 15,000 ppm.
The annual corrosion rate in seawater is less than 0.02 mm, and its corrosion resistance is superior to copper-nickel. Mechanical properties
The tensile strength of the annealed state is 380-420 MPa, and the yield strength is ≥ 160 MPa, with an elongation rate of ≥ 30%.
After cold processing, the tensile strength can reach 600-750 MPa, but the plasticity significantly decreases (the elongation rate drops to about 8%).
It is suitable for forming processes such as winding and deep drawing, and the cold rolling/extension deformation amount needs to be controlled at ≤ 15%.
Other characteristics
The softening temperature is ≥ 600℃, the Rockwell hardness is 130 HRC, and the compressive strength is 654 MPa.
The strength retains approximately 70% at high temperatures (200℃), and it is suitable for short-term high-temperature forming. 
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Product parameter

Chemical composition 
The chemical composition of BMn43-0.5 manganese white copper is as follows:
‌ Copper (Cu): 78% or more ‌
‌ Manganese (Mn): 0.10% - 1.0% ‌
‌ Nickel + Cobalt (Ni + Co): 42.0% - 44.0% ‌
‌ Zinc (Zn): remainder ‌
‌ Lead (Pb): ≤ 0.02% ‌
‌ Boron (P): ≤ 0.005% ‌
‌ Iron (Fe): ≤ 0.5% ‌
‌ Silicon (Si): ≤ 0.15% ‌
‌ Beryllium (Sb): ≤ 0.002% ‌
‌ Sulfur (S): ≤ 0.01% ‌
‌ Arsenic (As): ≤ 0.01% ‌
‌ Carbon (C): ≤ 0.03% ‌
‌ Bismuth (Bi): ≤ 0.002% ‌
‌ Magnesium (Mg): ≤ 0.05% ‌
‌ Total impurity content: ≤ 0.6% ‌

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COMPANY PROFILE




Shiyu Metal Material Technology Co., Ltd. is a collection of procurement, processing, agent, sales, logistics, warehousing in one of the enterprises, the company has a large-scale spot supply base in China, with domestic and foreign large steel mills and suppliers to maintain good relations of cooperation, with a full range of multi-channel procurement resources.
Shiyu Metal main products: nickel base alloy, Hastelloy, super austenitic stainless steel, duplex stainless steel, cobalt base alloy, pure nickel, titanium and titanium alloy, heat resistant, corrosion resistant alloy and other kinds of steel, a large number of product categories, can meet the size and thickness customization, prefabrication and other diversified needs.
The company has ISO9001 quality certification, the company's product standards include: the United States (UNS) ASTM /ASME, AMS, German DIN/EN, Japan (SUS) JIS and other standards supply, provide the original material certificate. We can supply according to the standards and technical requirements provided by customers to ensure that the goods and specifications are complete to meet the needs of various merchants. From raw materials to finished products, all go through three quality inspection to ensure the qualified rate of finished products. Shiyu Metal strives for perfection in every detail to ensure that the quality of products in different countries and regions around the world can meet international standards. Shiyu Metal has established a good strategic cooperative relationship with the world famous steel mills such as HAYNES, ATI, SPECIALMETALS, VDM, OUTOKUMPU, Japan Metallurgy, Nippon Steel, and Datong Special Steel.
The products supplied by Shiyu Metal are widely used in nuclear power, petrochemical, mechanical engineering, precision processing, aerospace, electronic instruments, medical equipment, automobile manufacturing, environmental protection, wind power application, seawater desalination, shipbuilding industry, paper making machinery, mining engineering, cement manufacturing, metallurgical manufacturing, corrosion resistant environment field, high temperature environment field, mold field, etc. It is a global high-quality supplier of special steel materials.
Shiyu Metal Material Technology Co., Ltd. is committed to the purchase, agent and sales of special steel, and has a perfect special steel sales management system and product quality supervision system. The company has been adhering to the "integrity, innovation, responsibility, win-win" business philosophy, adhere to the "quality first, customer first" service purpose, to provide customers with quality services and high-quality steel products. Shiyu Metal actively participates in the development of domestic steel industry ecology, and is willing to contribute to the development of national special steel.



ENTERPRISE ADVANTAGE




SERVICE

From steel procurement, processing, logistics, warehousing, 
Shiyu Metal has a perfect management system, tailor-made solutions for each customer, strictly control each link, to ensure safe, efficient and accurate product delivery to customers;




RESOURCE

Shiyu Metal maintains good cooperative relations with medium and large steel mills and suppliers at home and abroad, 

and has established good strategic cooperative relations with world famous steel mills such as the United States, Germany, Finland and Jap.




SCALE

Shiyu Metal set procurement, processing, agency, sales, logistics, 

warehousing in one, can provide customers with steel products procurement, processing, logistics and other one-stop services.




PRODUCT

Shiyu Metal operates a wide range of steel products, can provide customers with product size and width customization, prefabrication and other services, perfect product quality supervision system, to ensure high standards of product quality, high quality.