300 series: chrome, nickel austenitic stainless steel:

  • model 301：good extension to use on sharped products. It can also become harden rapidly through other processes. This material is good for welding, good resistance for friction and higher fatigue against degree than 304 stainless steel, like spring wheel cap and steel structure.
  • model 302：corrosion against degree is same good as 304 but with higher strength because with higher carbon content.
  • model 303：add with few sulfur and phosphorous to make easy to cut in production
  • model 304：general model as 18/8 stainless steel. Product such as: corrosion- resistance containers, kitchen wears, furniture, bars, medical equipment. The standard content is 18% chrome + 8% nickel and no magnetism. It is not able to use heat treatment to change the structure.
  • model 316：after model 304, the second stainless material used in production generally. It is mainly used on food industry and surgery equipment. It is added with molybdenum (Mo) to let it have special resistance corrosion- resistance performance, so it is also used on boat making. SS316 also generally uses for nuclear recycle system. 18/10 stainless steel is also matching this using range, especially for chemical, sea environment for boat and construction where is easy to corrode.

400 series：ferrite and marquenching stainless steel:

  • model 420 ： with higher carbon content, so the hardness and strength is better. It can make with very shiny surface to use for knife, spring, surgery equipment and valve.
  • model 430 ： ferrite stainless steel. Use for decoration with magnetism, like for car accessories. It has good performance of sharping but bad in corrosion and temperature resistance. It is for connecting parts, kitchen wears and furniture. The standard content is 16-18% chrome with low carbon.
  • model 440 ： high strength knife steel with higher carbon. The hardness can be reached 58HRC after proper heat treatment. It is one of the most hard stainless steel. It is usually used on shaving blade. The general models are 440A, 440B, 440C and 440F (easy in processing).