EFFECT OF HIGH TEMPERATURE SODIUM ON AUSTENITIC AND FERRITIC STEELS. MECHANICAL PROPERTIES OF MATERIALS. TOPICAL REPORT NO. 8. RESULTS OF MECHANICAL PROPERTIES TESTS OF 304 SS SPECIMENS CONDUCTED IN: 1. 1200 F SODIUM CONTAMINATED WITH OXYGEN (approximately 300 ppm) 2. 1200 F SODIUM CONTAMINATED WITH CARBON