Two of the most commonly used SS Stud Bolts Materials by Stainless Steel Stud Bolt Manufacturers In India include the austenitic stainless steel grade 304 & 316.Both these two grades of SS Stud Bolts have good mechanical properties due to the high content of chromium, molybdenum and nickel in their alloy. These three elements from the primary alloying content in the Stainless Steel Stud Bolts.