Here are some popular types of steel that you may use with one of our Speedwerx tube or pipe bender.

-Nominal Bore Pipe (NB Pipe) 

NB pipe is rolled and welded Seam pipe, also known as welded steel pipe, is made of carbon steel that is easy to weld. In terms of nominal size, its commonly used nominal internal sizes are NB 15~100, and its largest nominal diameter is DN150. Welded steel pipes are also called water and gas pipes because they are often used to transport hot and cold water and gas. Galvanized welded steel pipes are customarily called white iron pipes at construction sites, while non-galvanized welded steel pipes are called black iron pipes. The blank used for welded steel pipes is steel plate or strip that is rolled and welded with a large visible seam on the inside.

Common uses for pipe are bull bars ,rock sliders , ute trays and general fabrication where a cheap/strong and easy to work with an obtain material is required.


-Electric Resistance Welding (ERW)

Electric Resistance Welding requires cold forming metal coil to form it into a round tube shape. There are various ways to make the weld, however all welds are made through electrical resistance.

ERW tube is commonly welded using an automated process which results in a lower cost product.

ERW tube is commonly used for furniture making some low stress automotive products and low pressure fluid transfer + other uses.

-Cold Drawn Seamless (CDS)

Cold Drawn Seamless round tube is manufactured by piercing hot metal billets to create a tube that is then further rolled to elongate and reduce the diameter. The tubes are then cooled and sized to the required dimensions.

CDS tubing can have tight tolerances so the dimensions are accurate, they can have thicker wall dimension allowing for a stronger tube and have an excellent aesthetics for the finished product.

CDS tubing can be used where the aesthetics is important such as roll cages and vital components in the automotive industry and many other uses.

-Drawn Over Mandrel  (DOM)

Drawn Over Mandrel tubes are manufactured by cutting metal coil to the required width and cold rolling into a tube shape. The edges are welded together using electric resistance while under pressure to secure the final shape. The tube is drawn over mandrels to reduce the tube diameter and thins the walls to the required specification.

Drawing the tube over a mandrel improves the strength, hardness and machinability of the tube and allows for very high tolerances and excellent consistency in the final product.

DOM tube is used in the automotive industry for many critical parts.


-Cold Drawn Welded (CDW) (Typically Minimum 350MPA)

Cold drawn welded tubes are made similar to ERW but it is then drawn over a mandrel to give a truer wall thickness and size.

Commonly used for roll cages and other parts

-4130 Chromoly (typically minimum 650mpa)

4130 Chromoly is a hi-tensile alloy steel manufactured to a high standard. other names may include Chromoly, CrMo, Chrome-Moly, Chromium Molybdenum.

Used for high end automotive products like roll cages and chassis where maximum strength and minimum weight are required also used in aero space , motorcycle/bicycle frames and many other items.

-Hydraulic Line Tube 

Hydraulic Line tube is produced to meet the requirements of hydraulic lines and where bending or flaring is required. Hydraulic tube can be manufactured by welding flat rolled metal or by rolling and piecing bar stock, which creates a seamless tube. Both methods require carefully controlled finishing stages, either through normalizing in a controlled atmosphere or through annealing, to meet the hydraulic standards.

Hydraulic tube has a very bright and clean finish which is aesthetically pleasing, the material is chemically controlled to ensure consistency and has a high degree of workability.

Hydraulic tubes are used in any application where fluid is pumped or where bending and flaring is important.

The Information proved here is for general use only and you should always use the materials as recommended by your engineer or governing bodies such as CAMS , ANDRA Ect.