EOS StainlessSteel GP1 is a pre-alloyed stainless steel in fine powder form. Its composition corresponds to US classification 17-4 and European 1.4542. This kind of steel is characterized by having good corrosion resistance and mechanical properties, especially excellent ductility in laser processed state, and is widely used in a variety of engineering applications.

This material is ideal for many part-building applications (DirectPart) such as functional metal prototypes, small series products, individualised products or spare parts. Standard processing parameters use full melting of the entire geometry with 20 µm layer thickness, but it is also possible to use Skin & Core building style to increase the build speed. Using standard parameters the mechanical properties are fairly uniform in all directions. Parts made from EOS StainlessSteel GP1 can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required. Unexposed powder can be reused.

Typical applications:

• engineering applications including functional prototypes, small series products, individu- alised products or spare parts.

• parts requiring high corrosion resistance, sterilisability, etc.

• parts requiring particularly high toughness and ductility.

Minimum recommended layer thickness: 20 µm

Typical achievable part accuracy:
small parts ± 20-50 µm
large parts ± 0.2%