The dry sliding wear behavior of MoS 2 and WS 2 was studied with plasma-nitrided SG iron. Both the lubricants were effective in preventing wear loss of the sliding material due to low friction. The specific wear rate of coated material was 10 times lower than uncoated material. The coefficient of friction of MoS2 and WS2 was 0.1 and 0.03, respectively. Wear damage was observed to be significantly lower for lubricantcoated material compared to uncoated part. © ASM International.