Difference between 000,000L,000 and 000L in the valves Stainless steel resistant to weak corrosive media such as air,steam,water or stainless steel.The commonly used steel grades are 000,000L,000,and 000L,which are 000 series steels of austenitic stainless steel 000 stainless steel 000 stainless steel is the most common steel grade.Difference between 000,000L,000 and 000L in the valves Stainless steel resistant to weak corrosive media such as air,steam,water or stainless steel.The commonly used steel grades are 000,000L,000,and 000L,which are 000 series steels of austenitic stainless steel 000 stainless steel 000 stainless steel is the most common steel grade.Difference between 