Nickel Based Alloy Monel 400 Uns N04400 Butt Welding Pipe Fittings Elbow Tee Reducer

1. Nickel based alloy Introduction

Nickel based alloys refer to a type of alloy that has high strength and certain resistance to oxidation and corrosion at high temperatures of 650-1000 ℃. According to their main properties, they are further subdivided into nickel based heat-resistant alloys, nickel based corrosion-resistant alloys, nickel based wear-resistant alloys, nickel based precision alloys, and nickel based shape memory alloys. High temperature alloys are divided into iron-based high-temperature alloys, nickel based high-temperature alloys, and cobalt based high-temperature alloys according to their different matrices. Nickel based high-temperature alloys are commonly referred to as nickel based alloys.

• Corrosion resistant alloy

Nickel-based corrosion-resistant alloys, comprising primary alloying elements of copper, chromium, and molybdenum, exhibit superior comprehensive performance. They are able to withstand various acid corrosion and stress corrosion. The earliest nickel-copper (Ni-Cu) alloy, known as Monel alloy (Ni 70 Cu30), was produced in the United States in 1905. Other notable nickel-based alloys include Ni-Cr alloys (for heat and corrosion resistance), Ni-Mo alloys (primarily Hastelloy B series), and Ni-Cr-Mo alloys (primarily Hastelloy C series). Pure nickel itself is also a representative of nickel-based corrosion-resistant alloys. These alloys are predominantly used in the manufacturing of components for harsh corrosive environments in industries such as petroleum, chemicals, and power.

• Wear-resistant alloy

Overview of Nickel-Based Composite Powders and Their Alloying Elements
Nickel-based alloys are renowned for their exceptional wear resistance, oxidation resistance, and corrosion resistance. They are often used in the manufacture of wear-resistant components and can serve as coating materials applied through welding and spraying processes.

Types of Nickel-Based Composite Powders:
Non-Self Fluxing Alloy Powders

Characteristics: These powders do not contain, or have low content of, boron (B) and silicon (Si). They are primarily used for plasma arc spraying, flame spraying, and plasma surface strengthening.
Examples:
Ni-Cr (Nickel-Chromium)
Ni-Cr-Mo (Nickel-Chromium-Molybdenum)
Ni-Cr-Fe (Nickel-Chromium-Iron)
Ni-Cu (Nickel-Copper)
Various combinations including phosphorus (P) and aluminum (Al)
Self-Fluxing Nickel-Based Alloy Powders

Characteristics: These powders contain elements like boron and silicon that form low melting point eutectic crystals, allowing the alloy to fuse easily with substrates at lower temperatures. They are useful in applications requiring a bond with minimal thermal input.
Examples:
Ni-B-Si (Nickel-Boron-Silicon)
Ni-Cr-B-Si-Mo (Nickel-Chromium-Boron-Silicon-Molybdenum)
Various combinations incorporating copper (Cu), tungsten (W), and high levels of chromium and molybdenum
Roles of Various Elements in Nickel-Based Alloys:
Boron and Silicon: Reduce the melting point, expand the solid-liquid temperature range, deoxidize, and enhance the hardness and operational performance of coatings.
Copper: Enhances corrosion resistance against non-oxidizing acids.
Chromium: Provides solid solution strengthening, passivation effects, enhances corrosion and high-temperature oxidation resistance. Excess chromium can lead to the formation of hard phases like chromium carbide and chromium boride, which improve hardness and wear resistance.
Molybdenum: Causes lattice distortion due to its large atomic radius, strengthening the alloy matrix, improving high-temperature strength, and enhancing resistance to cavitation and erosion.
Applications
Nickel-based composite powders are widely used across various industries, including aerospace, automotive, and energy sectors, for protective coatings, repair, and life extension of parts exposed to harsh operational environments. These powders are chosen based on their ability to enhance surface properties such as resistance to wear, heat, and corrosion, which are critical for extending the durability and efficiency of industrial components.

2. Monel 400 Seamless,welded Pipe Elbow

Monel 400 alloy (UNS N04400 or MCu-28-1.5-1.8 or Ni68Cu28Fe) is a nickel based alloy material with good corrosion resistance in seawater, chemical solvents, ammonia sulfur chlorine, hydrogen chloride, various acidic media such as sulfuric acid, hydrofluoric acid, hydrochloric acid, phosphoric acid, organic acids, alkaline media, salts, and molten salts.
Monel 400 alloy has excellent mechanical properties and is widely used at temperatures ranging from low to high, exhibiting excellent welding performance and medium to high strength.
Monel 400 is mainly used in fields such as chemistry, petrochemicals, and ocean development. It can be used to manufacture various heat exchange equipment, boiler feedwater heaters, petroleum and chemical pipelines, containers, towers, tanks, valves, pumps, reactors, shafts, etc.

Specification

Specifications : ASTM B366 / ASTM SB 366M

Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-43.

Size : NB ½" -24″ seamless, NB2"-72" welded in Sch 10s, 40s, 80s, 160s, XXS.

3. Application area
Nickel based alloys are used in many fields, such as:
1. Ocean: marine structures in the marine environment, desalination, aquaculture, and heat exchange of seawater.
2. Environmental protection field: flue gas desulfurization devices for thermal power generation, wastewater treatment, etc.
3. Energy sector: Atomic power generation, comprehensive utilization of coal, tidal power generation, etc.
4. Petrochemical industry: refining, chemical equipment, etc.
5. Food industry: salt production, soy sauce brewing, etc. Among the many fields mentioned above, ordinary stainless steel 304 is not competent. In these special fields, special stainless steel is indispensable and irreplaceable. In recent years, with the rapid development of the economy and the continuous improvement of the industrial level, more and more projects require higher grade stainless steel. With the increasing demand for nickel based alloys in various industries. In 2011, the market size of nickel based alloys in China reached 23.07 billion yuan, with a year-on-year growth rate of 19.47%. Therefore, the development level of the industry is steadily increasing.