Flag Methods: American Iron and Steel Institute is a three-digit number used to mark a variety of standard grade wrought stainless steel. In which: ① austenitic stainless steel with 200 and 300 series of numerals. ② ferritic and martensitic stainless steel 400 series is represented by a number. For example, some of the more common austenitic stainless steel is 201, 304L, 316 and 310 as a marker. ③ ferritic stainless steel is marked 430 and 446, 410, 420 and 440C martensitic stainless steel is a mark, duplex (austenite - ferrite). ④ stainless steel, precipitation hardening stainless steel and high alloy iron content of less than 50% usually uses proprietary name or trademark name.[url=http://www.jawaymetal.com/web/getnews_news?path=new-show.jsp&data.id=3201e1f727944a6e82cfa8f3f1b42f4f&shoucang.userId=]hot sale galvanized steel pipe[/url]

Nature: as a low C of the 304 steel, in the general state, the corrosion resistance of 304 similar, but after welding or after stress, its excellent corrosion resistance to the grain boundaries. In the case without heat treatment, can remain good corrosion resistance, generally use the following 400 (non-magnetic, temperature -196 degrees Celsius to 800 degrees Celsius). Applied to grain boundary corrosion resistance for high chemical, coal, inside and outside the open machine oil industry, building materials, heat-resistant parts and heat treatment difficult parts.[url=http://discountstainlesssteel.com/stainless-steel/7681.html]302 Vs 316 Stainless Comparison[/url]

Development of 304L stainless steel, has made 304L stainless steel corrosion resistance, appearance, workability, strength and other characteristics far more than other materials, and that many of the stainless steel surface treatment method, you can get a variety of color and shape, which is stainless steel make a significant contribution to development.[url=http://www.jawaysteel.com/seamless-stainless-steel-pipe-manufacturers.htm]seamless stainless steel pipe manufacturers[/url]