Austenitic class stainless steel, a chromium-nickel-iron alloy, sequenced primarily, but not limited to, the 100, 200 and 300 numeric series, which comprises over 70% of all current stainless steel production. The 300 stainless steel grades, including Type 304, the most common and Type 316 the second most common and are seemly the most widely used. Other stainless steel grades in this stainless steel class are Types 301, 302, 302B, 303, 304, 304L, 304N, 305, 308, 309, 310, 316, 316L, 316F, 316N, 317, 317L, 321, 330, 347, 348, 384, AL-6XNTM, 904LTM, XM-19, nitronic 40, nitronic 50 and nitronic 60.