ISI Marked Products · National Building Code of India . Part 1 Cold Drawn Stress-relieved Wire. Steel and Steel Products (Quality Control) Order. In a bid to enhance quality control in the steel industry, the Centre has made ISI mark mandatory for 15 more steel and steel products, including. From March 18, Bureau of Indian Standards (BIS) will make ISI certification mandatory for more steel products. With this directive, those steel.