B30

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Product information

Model: B30 
B30 white copper (copper-nickel alloy) has excellent corrosion resistance, good mechanical properties and specific physical characteristics, and is widely used in marine engineering, power equipment, and other fields. 
Corrosion resistance
In a 3.5% sodium chloride solution, the corrosion rate of B30 white copper is only 0.0028mm/a, which is much lower than that of ordinary brass (0.05mm/a). Its corrosion resistance stems from the dense oxide film formed by nickel, which can effectively prevent chloride ion erosion. For example, the fasteners of the Donghai Wind Power Platform remained intact after being exposed to salt spray for 8 years, while carbon steel parts began to rust after only 6 months. 
Mechanical properties
The tensile strength can reach 380-450MPa, the elongation is 25%-35%, and the hardness HRB is approximately 65-75. In the annealed state, the tensile strength is 380-450MPa, the yield strength is 140-180MPa. After cold hardening, the strength can reach 550-700MPa, but the elongation drops to over 12%. 
Physical properties
The thermal conductivity is 29W/(m·K), approximately 1/10 of pure copper, suitable for heat exchanger applications. The thermal expansion coefficient is 16.2×10⁻⁶/℃, and the resistivity is 37μΩ·cm. 
Typical applications
It is mainly used for marine engineering components (such as shock-absorbing components of offshore wind power platforms), chemical equipment (condenser tube plates), power electronic components, and medical devices. The Zhoushan Cross-Sea Bridge project in 2024 proved that it can withstand the impact of a 16-level typhoon. 
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Product parameter

Chemical composition
The chemical composition of B30 white copper mainly consists of copper (Cu) and nickel (Ni), and it also contains trace alloy elements. The specific details are as follows: Main components
Nickel + Cobalt (Ni + Co): 29.0 - 33.0%
Copper (Cu): The remainder (about 65% - 70%)
Secondary alloy elements
Iron (Fe): 0.5% - 1.0%
Manganese (Mn): 0.5% - 1.5%
Silicon (Si): ≤ 0.15%
Carbon (C): ≤ 0.05%
Phosphorus (P): ≤ 0.006%
Sulfur (S): ≤ 0.01%
Lead (Pb): ≤ 0.001%
Other trace elements
Some sources mention that there may be trace amounts of magnesium (Mg) (0.02% - 0.1%) to purify the grain boundaries 3, or zinc (Zn) and rhenium (Re) 6, but these are not clearly listed in all standards. 
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Product display

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.


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