SEDL / STP / STP418-EB / STP48439S

Effects of Residual Elements on the General Corrosion Resistance of Austenitic Stainless Steels

Scharfstein, L. R.
Assistant manager of the laboratories, The Carpenter Steel Co., Reading, Pa.

Pages: 15    Published: Jan 1967

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Abstract

A literature review and new experimental data are presented on the effects of residual elements (boron, carbon, nitrogen, silicon, phosphorus, sulfur, aluminum, cobalt, copper, molybdenum, columbium, and titanium) on the general corrosion resistance of the austenitic Cr-Ni stainless steels. Only molybdenum, copper, and cobalt are considered beneficial; boron less than 0.006 per cent may help resist intergranular corrosion; boron greater than 0.010 per cent, silicon, carbon, and sulfur are detrimental, while nitrogen, phosphorus, aluminum, columbium, and titanium may either be “neutral” or detrimental depending upon concentrations, heat treatments, and “cleanness” of the melt.