Go to content

Types of metal alloys

industrial piping



There are many different steel alloys and other metals with their own individual properties and uses. As a specialist in pipe welding, Qualifab is able to work with the vast majority of alloys. The following are some of the metal alloys with which we work on a regular basis.

Carbon steel

The main component of carbon steel is carbon, with other alloy elements present only in very small quantities. A higher carbon content increases the strength of the steel by heat treatment, at the expense of ductility.

Stainless steel

Stainless steel is high in chromium, which is resistant to corrosion and rust. The chromium in the steel leads to the formation of a protective layer of chromium oxide, which gives the alloy its resistance to corrosion. Other components can be added, including nickel, which improves general mechanical properties and ductility, or even molybdenum or titanium, which increase the stability of the alloy in less moderate temperatures.

Chromoly steel

Chromoly steel, or chromium-molybdenum steel, is a high-quality steel which main components are chromium and molybdenum. The chromium gives the alloy its resistance to corrosion and rust, while the molybdenum increases the steel’s strength in high temperatures. As a result, it is used in high-strength alloys and high-temperature steel. Alloy components are selected based on its intended use (balancing hardness and toughness) and weldability.


Duplex stainless steels have a structure of ferrite and austenite (austenitic-ferritic steels). They are mechanically strong, magnetic, weldable and known for their superior resistance to corrosion, especially cracking.

Inconel 625

Inconel is a registered trademark of Special Metals Corporation and is used as a prefix denoting various metal alloys. In the metallurgical industry, Inconel 625 is considered a superalloy, an alloy that contains large quantities of nickel, chromium or iron. It is designed to withstand extreme environments, including high pressures and high temperatures.


Aluminum is a malleable metal known for its resistance to oxidation and low density. It is found in its combined form in more than 270 different minerals, with bauxite as its main mineral. The main advantages of aluminum are its light weight and excellent conductivity.