Effect of oxygen on the mechancial properties and character of fallure of powder steel 40N3M

1.	Oxygen in real sprayed and deformed steels (a porosity of less than 1%) lowers the mechanical properties even when its content is approximately 0.01%; this is apparently associated with its presence in the solid solution. A further increase in the oxygen content (to 0.1%) has little effect on the mechanical properties, although the cold-shortness threshold is raised in this case.
2.	The effect of oxygen on the cold-shortness threshold of the powder steels is appreciably smaller than that for the conventionally produced steels.

I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 39–44, January, 1988.