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Nickel-copper Alloy N4
Pure nickel (N4) is a core material in many high-end manufacturing fields due to its high purity (nickel content ≥99.9%), excellent corrosion resistance, good electrical conductivity, and high-temperature stability. High purity is ensured through vacuum induction melting, and various forms of N4 products are available, such as bars, tubes, strips, wires, and plates, with a full range of specifications. Production can be carried out according to domestic and international standards.
Nickel Alloy 200
Nickel Alloy 200 is manufactured using vacuum induction melting (VIM) to ensure high purity and low gas content. Subsequent processes such as hot rolling, cold drawing, and precision grinding can produce products of various shapes and tolerances. It exhibits excellent resistance to reducing media, alkaline solutions (especially caustic soda), and numerous salt solutions; possesses high electrical conductivity and good magnetostrictive properties, making it widely applicable in the electronics field; and in sulfur-free reducing atmospheres, NI200 can be used for extended periods up to approximately 600°C, and features low gas solubility and low vapor pressure, making it suitable for aerospace components and energy applications.
Nickel Alloy 201
The core technological advantage of Nickel Alloy 201 lies in its high-purity material and extremely low carbon content design, ensuring its stability in high-temperature environments. It is used in various applications including the alkali industry (ion-exchange membrane caustic soda production), chemical equipment, food processing, electronics and electrical engineering, automotive exhaust catalysts, and aerospace. With a production capacity of 500 tons per year, the mature and stable production system can meet continuous customer demand. The product is available in various forms including plates, tubes, rods, wires, strips, and foils, with diverse specifications to meet the customized needs of customers in different industries.

High Temperature Alloy MP35N

MP35N is a high-temperature alloy for fastener applications developed by SPS Technologies, a renowned American manufacturer of fasteners for the Space Shuttle. This non-magnetic nickel-cobalt-chromium-molybdenum alloy possesses a unique combination of properties, including a strength of 300 ksi (2068 MPa), good ductility and toughness, excellent corrosion resistance, and a high-temperature resistance up to 400°C, making it similar in overall performance to titanium alloys. The properties of MP35N are achieved through work hardening, martensitic phase transformation, and aging treatment. Cold working induces a solid-state phase transformation in a portion of the matrix, changing the crystal structure from face-centered cubic (fcc) to hexagonal close-packed (hcp). This transformation occurs due to the high cobalt content in the alloy and is known as a "multiphase reaction." The presence of these two different crystal structures hinders dislocation movement and leads to significant strengthening. Subsequent age hardening stabilizes these two stages through a solute partitioning process, further enhancing the alloy's strength.

I. Introduction:

MP35N is a Ni-Cr-Co-Mo multiphase alloy, non-magnetic, and possesses exceptionally high tensile strength, reaching 300 KSI (2068 MPa). It also exhibits good ductility, toughness, and excellent corrosion resistance. Furthermore, this alloy demonstrates remarkable resistance to sulfidation, high-temperature oxidation, and hydrogen embrittlement.

These unique properties of MP35N are achieved through work hardening, phase transformation, and aging treatment. When used under fully work-hardened conditions, the operating temperature ranges from -200°C to 315°C, with a maximum recommended temperature of 750°F (399°C).

MP35N density: 8.43 g/cm³

II. Properties

MP35N exhibits excellent resistance to sulfidation, high-temperature oxidation, hydrogen embrittlement, salt spray, and most mineral acids. This alloy demonstrates excellent resistance to stress corrosion cracking under harsh environments and high strength conditions. It also exhibits extremely high resistance to localized corrosion, such as pitting and crevice corrosion.

This alloy exhibits excellent resistance to stress corrosion cracking under harsh, high-strength conditions, whereas most conventional alloys would crack under similar conditions. MP35N also demonstrates excellent resistance to pitting and crack corrosion.

In seawater environments, regardless of strength level or material condition, MP35N is capable of withstanding general crack corrosion and stress corrosion.

MP35N is an inert metal. If bonded to more reactive metals, such as carbon steel, 316 stainless steel, or Monel K-series metals, and an electrical current is applied, electrochemical corrosion is likely to occur.

MP35N alloy conforms to the relevant NACE MR-01-75 standard, with a maximum hardness of Rockwell C35 (which can be achieved to Rockwell C48 through special cold rolling and aging treatment). (NACE MR-01-75 is a standard regarding the sulfide stress cracking resistance of metallic materials used in oilfield equipment.)

III. Characteristics of MP35N Alloy

① High strength, excellent ductility and toughness.

② It is the most corrosion-resistant fastener alloy, capable of withstanding most mineral acids, hydrogen sulfide, seawater, and salt spray environments, and exhibits excellent resistance to stress corrosion, crevice corrosion, and hydrogen embrittlement.

③ The maximum operating temperature is 400℃.

④ It has the highest fatigue strength among corrosion-resistant fastener materials.

⑤ It has the highest minimum shear strength of 1000MPa among corrosion-resistant fastener materials.

IV. Applications

Due to its rare combination of multiple excellent properties, MP35N is widely used in various working conditions. This alloy is used in fasteners, springs, non-magnetic electronic components, and instrument parts in the pharmaceutical, seawater, oil and gas field, chemical, and food processing industries.

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Products

Featured products

Nickel-copper Alloy N4

Nickel Alloy 200

Nickel Alloy 201

High Temperature Alloy MP35N