Different Types of Steel Tubing and Stainless Steel Piping


Stainless steel is a versatile material composed of a steel alloy and a small percentage of chromium. The presence of chromium contributes to the corrosion resistance of the material, a quality that acquired its name from stainless steel. Since stainless steel is also low-maintenance, resistant to oxidation, and does not damage other metals it comes into contact with, it is often used in a wide variety of applications, especially in the manufacture of piping and tubing. Stainless steel piping is split into multiple categories based on the end-use of the pipe.

Different Types of Steel Tubing and Stainless Steel Piping/Pipes

It is often difficult to classify pipes and tubes, and they appear to be differentiated based on function. Stainless steel is also distinguished by type and grade, in addition to these classifications.

304 Stainless Steel Pipe

Type 304 SS piping is most popularly used in the piping applications as it has high chemical and corrosion-resistant. Type 304 SS pipes are not compatible with applications where temperatures range between 800 and 1640 degree F as it is prone to precipitation of carbide.

Type 304L stainless steel circumvents this issue because it has a lower limit on the carbon content and can therefore be used for welding and higher temperature applications. Other stainless steel types also have additives (such as nickel or molybdenum) that enhance properties that, in specific applications, are desirable.

Stainless Steel 316Ti Pipes

316Ti Stainless Steel Pipes & Tubes, which are used because after heating within the carbide precipitation range of 425 Degree C to 850 Degree C, they are not susceptible to intergranular corrosion. A drawback with 316Ti Stainless Steel Pipes is that titanium does not transfer well over a high-temperature arc, so it is not recommended as a welding consumable.

316Ti Stainless Steel pipes are the grade of choice for applications in the temperature range of up to 900 Degree Celsius. The 316Ti Stainless Steel Tubes combine high strength, phase stability and scaling resistance to subsequent aqueous corrosion in the business. Stainless Steel 316Ti pipes are a modification of SS 316 having a higher carbon content, to provide improved high-temperature strength.

In order to improve strength and hardening capability and to achieve special properties such as high-temperature sustainability, high yield and impact performance, and corrosion resistance, elements with a lower percentage in SS 316Ti pipes are added.

Stainless Steel 446 Pipes

Stainless steel 446 pipes is a ferritic, non-heat-treatable stainless steel that offers high-quality corrosion and oxidation resistance to rising temperatures. Grade 446 stainless steel machinability is feasible at slow speeds through rigid mounts, sharp tooling surfaces and positive feeds.

SS 446 Pipes can be effortlessly welded by using several of the traditional methods, aside from oxyacetylene welding. Meanwhile, because of their high level of chromium content, they are often more difficult for cold work than other stainless steels.