Are S31608 stainless steel and 316 stainless steel the same material? Stainless steel has good acid-resistant steel, corrosion resistance characteristics, stainless steel is a widely used material for industrial pipes. S31608 stainless steel, 316 stainless steel, 316L stainless steel and other materials are often found in the construction of pressure pipe fittings, what is the difference between them? Ningbo Xinggang Pipeline Equipment Co., Ltd. will introduce it to you, I hope it will be useful to you.
The old grade of 316 is 0Cr17Ni12Mo2, the new grade is 06Cr17Ni12Mo2, and the unified numerical code is: S31608. GB20878-2007 Stainless steel and heat-resistant steel grades and chemical composition. There is S31608 material in NB/T47010-2010 stainless steel flange forgings, which corresponds to 0Cr17Ni12Mo2 in JB/T4728-2000 stainless steel flange forgings. That is, 316 of the American Standard.
The old grade of 316L is 00Cr17Ni14Mo2, the new grade is 022Cr17Ni12Mo2, and the unified numerical code is: S31603. Also, S31603 is what we often call 316L. Needless to say, it belongs to the low-carbon version of 316, and its carbon content does not exceed 0.03%. The low carbon version, which contains no more than 0.03% carbon, its main advantage is that heat treatment can be carried out after welding.