6 Types of Nickel Alloys

Nickel alloys are metals that can be combined with other elements to create durable, high-quality materials. Alloys often combine different types of nickel which act as the base metal and help maintain desirable properties like corrosion resistance. Nickel alloys have many uses, including coins, gas tanks for vehicles, aircraft engines parts, medical devices and more.

Nickel alloy 20 tubing is one kind of stainless steel that’s resistant to high temperature. Nickel iron alloy is used at places where a low rate of thermal expansion is required. Nickel copper alloy is used in marine procedures as it offers corrosion resistance from salty water or seawater. Nickel chromium iron alloy is used to produce alloy that can assist in oxidation together with high-temperature corrosion. Nickel molybdenum alloy provides high chemical resistance from hydrochloric acid, sulfuric acid and other strong acids.

A Brief Guide to AL-6XN Alloy

The AL-6XN alloy was originally designed to be a material with resistance to seawater. Since its creation, it has proven to be resistant to a lot of different corrosive environments. The resilience, corrosion resistance, and durability of this material make it ideal for various applications. It proves to be a better and more cost-effective alternative to more high-end nickel-based alloys.

Applications of AL-6XN

The high content of nickel and molybdenum offers more resistance to corrosion and cracking caused by chloride stress. Copper content has been kept at a residual level for better performance in seawater applications. Moreover, the composition of high allow in the AL-6XN alloy tubing protects from crevice corrosion and pitting corrosion. Following are some of the major applications of AL-6XN alloy –

  • Water piping systems for nuclear power plants
  • Process systems for offshore gas and oil platforms
  • Chemical process pipelines and tanks
  • Heat exchanger, condenser, piping for crude oil or seawater storage
  • Vats, press oils, filter washed in pulp bleaching plants
  • Tall oil distillation packing
  • Transformer cases that are exposed to marine water
  • Food processing equipment
  • Pharmaceutical equipment
  • Power plant fuel as a scrubber

Benefits Of Using Al-6xn Alloy

Following are some of the main benefits of using AL-6XN alloy tubing –

  • It is Cost-Effective

It is often used as an effective alternative to non-metallic materials. The latter materials offer high corrosion resistance but come with high installation and maintenance costs. However, AL-6XN alloy has considerably fewer expenses than a lot of nickel-based alloys.

  • It Offers Resistance to Corrosion

This alloy offers high corrosion resistance in acidic as well as alkaline environments. This ability offers protection against contamination and quick degradation of alloy-based components.

  • It Comes with As-Welded Specifications

AL-6XM features low carbon and high nitrogen contents. This mitigates the carbides precipitation and secondary phases while welding. Therefore when suitable metal is being used, and the assembly is properly cleaned, as-welded materials can be placed in the process. This alloy can be efficiently welded into the field through a similar procedure used in other austenitic stainless steel.

  • It is Highly Functional

The sturdiness and ductility of the AL-6XN alloy make the fabrication process easier both in the shop and field. The weldability and formability of the alloy are significantly better in comparison to duplex stainless steel or high alloy ferritic. And these materials offer similar corrosion resistance abilities.

Final Thoughts

AL-6XN alloy has an extensive application as it is denoted as a 6% moly super austenitic alloy offering chloride resistance found in sports brine, active pharmaceutical substance, barbecue sauce, and ketchup. Moreover, this alloy is an upgrade to 300 series alloy like 3014 and 316L/1.4435. It is identified as the UNS or Unified Numbering System designation of NO03867.

It contains 24% nickel, 6%molybdenum, 22% chromium and 10% nitrogen. There are many manufacturers who offer AL-6XN alloy tubing, but it is up to you to make an informed decision. Ensure that you choose a reputable manufacturer who uses the right chemical composition and high-quality raw materials to make the tubing.

Why Should Nickel Alloy Be Ideally Used For Piping System?

Nickel is a ductile metal that cannot be used alone. Hence, nickel alloy was discovered to make the use of the metal. You will find nickel alloy being used in different materials. Since the inception of civilization, nickel alloy is being used. Scientists have been continuously searching to bring innovations in the nickel alloys and put into the best use. For years, nickel alloys are being used in pipes, tools, coins, weapons, etc.

Nickel alloys have all the characteristics that make them an ideal choice of metals used for various purposes. Piping systems require a durable and sturdy metal that can withstand extreme pressure and weather conditions. You will rarely find any other alloy with such multiple characteristics.

Pipes made with nickel alloys can provide you with several benefits. So if you are looking to buy nickel alloy 800H tubing, you must look into the benefits of this amazing alloy metal.

Take a look at some of the amazing benefits of nickel alloy pipes:-

Heat Resistance

There are plenty of metals that can endure extreme heat and temperature. Nickel alloys can withstand temperatures exceeding 760 degrees Celsius. This ability make nickel alloy pipes an ideal option of the piping system in the industries that involve dealing with extreme heat and pressure like oil and gas industry.

Corrosion Resistance

When metals are exposed to water and oxygen, there are chances of oxidation that can make their surface prone to corrosion. The process of oxidation can cause the metal worn out. However, nickel alloy is highly resistant to corrosion compared to other metals. Hence, you can safely use nickel alloy pipes for the different piping system without worrying about corrosion. Nickel alloy can withstand all the weather conditions.

Low Expansion

Expansion becomes a concerning issue with metals used for piping system. Unlike other metals, nickel alloys have low thermal expansion rate that makes them ideal for piping system. Nickel alloys will maintain a uniform shape and size of the pipe irrespective of the circumstances. It depends on choosing the ideal nickel alloy that has a low expansion rate.

Magnetic Permeability

Nickel alloys have unique magnetic permeability characteristics making them an integral component in designing switchgear, current motors and generators. Magnetic permeability makes them lest reactive in the magnetic, so nickel alloys can be safely used in the areas with a maximum magnetic field. However, it is important to use appropriate nickel alloy that can best provide the magnetic permeability.

The Bottom Line

There’s no doubt in asserting that nickel alloy is preferred as an ideal metal for making different materials for all the valid reasons. Nickel alloy is used in making different objects that are durable and strong. It is also used in the piping system as well. Pipes made with nickel alloy will make your piping system safe from corrosion and extreme heat.

It is essential to understand the benefits of nickel alloy pipes before making any investment. The above mentioned were some of the best benefits of nickel alloy pipes that everyone must be aware of.

Brief Guide: Process for Welding Nickel

So many things can happen in the process of welding a nickel tube and you need to know about it before you get nickel alloy 600 tubing.

Nickel alloy tubing consists of a wide range of elements and they can pose a critical challenge when it comes to fusing. This and other challenges can be experienced in the welding of nickel. You, therefore, have to devise a comprehensive process that can help weld nickel without problems. Here are some of the processes you need to know when you get nickel alloy 600 tubing:

Using the Metal Inert Gas in Welding

Metal inert gas welding is also referred to as gas-metal arc welding. This is one of the common processes that you can use in melting a nickel tube. The process highly resembles the welding of carbon steel process except for the shielding gas compositions. Low levels of oxygen gas and carbon IV Oxide gas should be used in the process of welding nickel. The levels should be 2% or less. You also have to incorporate tri-blend shielding gases like helium and argon to make the nickel tube resistant to corrosion. The filler wire should also be used to prevent cracking.

Welding Using the Tungsten Inert Gas

Tungsten inert gas welding is also called gas tungsten arc welding. It is also another commonly used process that you can apply in welding a nickel tube. It highly resembles the welding of carbon steel process. Nickel and carbon steel all require a direct current electrode negative. Shielding gases like argon and helium are also used in this process. Low carbon is used as a filler metal to prevent any form of corrosion.

Flux-cored Arc welding

The flux-cored process can be used in welding a nickel tube. However, this process does not give optimal results in the welding of nickel. A mixture of special gasses should be used to make the welding process more effective. Using a combination of these special gasses and a flax-cored arc is more effective than just using flux-cored arc welding, this is because the gasses help in shielding the metal that has been welded from the atmosphere.

Metal-cored Arc Welding

This is a better alternative than flux-cored welding and gas-shielded flux welding. This is because this kind of welding does not rely on flux during the welding process. The metal core is used instead. The metal core is attached to the filler. The metal is filled with powdered metal that escalates deposition, this is even though the filler has some deoxidizers.

Laser Beam Welding (LBW)

This type of welding process is useful in joining nickel quickly and low heat inputs. Porosity and cracking may be experienced in the welding process, and as such, care has to be taken to avoid such instances. You can do this by reducing the amount of oxygen. You can use a shielding gas in its place or through a weld parameter optimization.

Other Welding Processes That Can Be Used

Those processes that have been explained above are the most common welding process that can be applied in welding a nickel tube. Several other processes can be used in place of those. These include Friction Stir Welding (FSW), Shielded Metal Arc Welding (SMAW), and Plasma Arc Welding (PAW), among others.