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.

Chromium Molybdenum for Tubing: What Is It and How Does It Fare?

There are many different materials for tubing, and your choice ultimately depends on either what your business needs or what will work best for your situation. Some of the most popular materials for tubing include stainless steel, titanium, and nickel. There is one material in particular, however, that has its slew of benefits and stands out in a couple of unique ways, yet there is often some confusion and misconception behind it. It is called chromium molybdenum, but, as a matter of fact, it goes by a handful of different names.

What is Chromium Molybdenum?

Chromium molybdenum is a material composed of the two titular elements in its name. Chromium, used in metal, is hard, shiny, and appeals cosmetically. Chromium is also used to make other alloys including stainless steel. Molybdenum is a light silver metal that makes the tubing ductile and resilient to corrosive substances. Together, they create an alloy that is strong, hard, rigid, resistant to corrosion, durable, and easy to fabricate.

Manufacturers, distributors, or merchants sometimes combine the two words and call it “chromoly”, “chromalloy”. or “chromimoly”. Some will even just combine their Periodic table abbreviations: CrMo. Regardless of what you or your provider calls this metal, it is associated with a four-digit code “4130”, which is a number assigned by The American Iron & Steel Institute. This code consists of two parts. The number “41” refers to a lot-alloy steel included in both these elements. The number “30” refers to the alloy’s carbon content, meaning that it contains a content of 0.30 percent. Thus, a low-carbon steel with a carbon content of 0.3 percent will happen to be 4130 tubing.

Chromium molybdenum is considered a high-quality metal with many advantages, but that also means the price for it is higher than other metals. Many buyers, though, have been willing to pay that price, knowing they have an alloy that works great and does not falter.

Uses for Chromium Molybdenum

Due to the durability and visual appeal of chromium molybdenum, it has a wide range of uses inside and outside industrial settings.

Conventional Pipes

4130 tubing is capable enough of transferring liquid and gas from one place to another. Ideal for housing, boilers, and other important purposes, this tubing will be greatly beneficial in the sense that it will last for a number of years and will not rust doing so.


4130 is tough enough to be able to crush stone, earth, and other hard material. This alloy can be used to make blades, teeth, and other devices as part of a machine that can cut or break apart said materials.

Vehicle Assembly

Chromium molybdenum is used to make parts both for automobiles and bicycles. The alloy can easily be welded to make car bodies, but it can also be used inside of vehicles for parts that are designed to withstand fluids and last a long time without wearing out. Chromium molybdenum is highly dependable in these regards. Bike frames can also be made from 4130 tubing.

Power Tools

Chromium molybdenum can also be made into parts for power tools, especially drill bits and taps. This alloy is a strong, tough material that can pierce or drill through softer materials, such as wood or drywall, with enough torque.


Chromium molybdenum is a metallic alloy that is highly durable and strong, used for many different purposes. It is classified by a scientific code of 4130, and goes under several different names. Consider buying 4130 tubing for what you need inside or outside any industrial setting.