china 201 stainless steel tube suppliers 201 steel tube ManufactureStudy
on the grain refinement of iron and steel material was in vogue, and " Super metal technology development. The theme for the development, usually stainless steel grain diameter of dozens of Micron, but in these subjects is working on a method of manufacturing, one-one hundredth to hundreds of NM nm metal grains, for example, the system of grain diameter of 300nm of austenitic stainless steel for its tensile strength 1100 N/mm2, is usually about twice times the size material. In order to receive a premise without prejudice to the toughness of high strength, placed a great deal of hope to this approach.