Steel

What is Steel

Steel 420/BR is a stainless steel 420 powder reinforced with bronze for added resistance. The final product is composed of 60% stainless steel and 40% bronze. The strength of steel and the anti-corrosive behavior of bronze make for a great combination with many use possibilities.

These resistant properties means it does not corrode or wear away easily. This makes it ideal for tools, cutlery, art objects and decorative hardware.

Properties

Steel 420/BR offers good mechanical properties and excellent wear resistance. This material is also resistant to corrosion from the atmosphere, water, steam, crude oil, alcohol and other similar corrosive media. However, it cannot handle heavy loads or stress like our Stainless Steel 316L.

For more specifications, the table below shows the exact properties of Steel 420/BR.

Printing Method

Binder Jetting uses a liquid binding agent, which is deposited between layers of metal powder to build an object. Following each deposition step, a layer of powder is cured, and when the entire printing process is complete, the object is removed from the printer and placed into an oven for further curing. When the printing process is complete, the build chamber is removed from the printer, and an operator carefully extracts the parts from the remaining powder.

Binder Jetting is an extremely fast 3D printing method, allowing one to print metal parts at a fraction of the cost compared to DMLS. However, since these parts tend to have a higher porosity, they offer lower mechanical properties than other industrial 3D printing techniques.

Design Specifications

Thickness & Geometry
The minimum wall thickness when 3D printing with Steel 420/BR depends on the size of your part. However, 1.0 mm is the minimum thickness for “stemmed” elements, where the length is twice as long as the thickness. For a wall thickness less than 1.1 mm, we recommend using support structures for stability.

Details
Steel 420/BR is not well suited for enclosed volumes and/or interlocking parts. 3D printing via Binder Jetting would not allow the powder inside to be removed.

Steel 420/BR can be used when the model must be printed in parts and then assembled. In this case, allow a 0.5 mm width between the different pieces to ensure fit.

It is not possible to 3D print sharp corners/edges with Steel 420/BR. This is due to the depowdering process from 3D printing via Binder Jetting. The radius should be below 1.0 mm to avoid breakage.