What's the meaning of the 3 Series 4 series stainless steel wire?
It's the 304 series304 is a versatile stainless steel which is widely used in the manufacture of equipment and parts requiring good overall performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 16% chromium, more than 8% of the nickel content. 304 stainless steel is a brand of stainless steel produced according to the ASTM standard in the United states. 304, equivalent to our 06Cr18Ni9 [according to GB/T 20878-2007 has been changed to 06Cr19Ni10] stainless steel.
Austenitic stainless steel is marked in figures 200 and 300,Ferritic and martensitic stainless steels are represented in figures of 400 series.