**4. Conclusions**

Based on the obtained results, the following conclusions were drawn:

1. Process parameter development for 20MnCr5 with the use of laser power equal to 225 W, an exposure velocity of 600 mm/s, and a hatching distance of 0.10 mm allowed us to obtain samples with a total porosity equal to 0.16%.


**Author Contributions:** Conceptualization, K.G.; Methodology, K.G.; Software, J.K.; Validation, J.K., I.S. and J.T.; Resources, B.S.; Data curation, J.Ł.; Writing—original draft, B.S.; Writing—review & editing, J.K. and L.S. All authors have read and agreed to the published version of the manuscript. ´

**Funding:** This work was financed by the Military University of Technology, Gen. S. Kaliskiego St., 00-908 Warsaw, Poland, under research project UGB: 22-830/2022.

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
