What is J2 grade in stainless steel? J2 stainless steel is an excellent material in external and construction applications. It consists of 0.128% carbon, 1.37% nickel, 13.29% chromium, 9.57% manganese, 0.33% copper, 0.49% silicon, 0.045% phosphorus, 0.001% sulfur, and 0.155% nitrogen. What is J1 stainless steel? J1 Stainless Steel is a low nickel variant of stainless steel. It is specifically chrome-manganese austenitic steel which has a relative amount of nitrogen. The nitrogen amount causes greater annealed strength in comparison to AISI- 304. | ![]() |