Chrome Moly Alloy Tube

Chromoly steel tubingChromoly steel tubing as it is often referred is known for being corrosion resistance, high-temperature strength, and having overall strength is some of the benefits of Chrome Moly Alloy Tubes.

What Is 4130 Chrome-Moly Alloy?

4130 Chrome-Moly is an alloy of steel that incorporates both Molybdenum and Chromium in the process.

Molybdenum (Mo) has be the key alloy to create creep-resistant steel. This steel is capable of withstanding up to 530 degrees Celsius. In Fahrenheit, that 986 degrees. Without a doubt, Mo-based products are the best when handling extreme temperatures. It is the reason why it is used in petrochemical plants and power stations. However, there are drawbacks that come with Molybdenum. For starters, increasing Mo within the steel can decrease creep ductility. This means products are more likely to fail during plastic deformation. In addition, pure Mo-based steel breaks down easier.

This was a huge problem for Mo-based products until discovering that you can alloy this element with Chromium. The combination of two alloys keeps Molybdenum’s heat resistance and strength while adding high corrosion resistance and tinsel strength. This union is what makes 4130 Chrome-Moly so commonly used in certain fields. 

Chrome-Moly Alloy Tubing is not lighter than steel. Yet, this steel tubing can reduce the weight in application. The average weight for both is 491 lbs. per cubic foot. But chrome moly alloy pipe has a better strength to weight ratio. Because of this type of tubing can have thinner walls or smaller diameters to reduce the weight.

Application of Chromoly Steel Tubing

chrome alloy bars used in racing

The 4130 Chrome-Moly alloy is what makes this steel tubing so practical and useful. As a result, the use of Chromoly Steel is applied to a variety of industries. 


  • In the power generation industry, chemical processing, and petroleum refinement, chrome moly alloy tube has become the industry standard.
  • The Aviation industry uses it typically in the fuselage of smaller aircraft.
  • Found in sport and racing vehicles; roll bars, cages, safety, etc.
  • Used for bike frames, particularly high-end cycle frames.

The 4120 AISI code defines the chemical composition of the steel (approximation).  In this case the 41 is the chromium and molybdenum content ratio of the low alloy and the 30 is the carbon content percentage of the steel.

We sell Chromoly steel tubing, we cut and will thread it if requested. Please Contact us to ask about pricing and get order information.

Posted In: Chrome Moly Alloy Tube, Steel Tubing

Tags: , ,