Henan BEBON international co.,ltd located in zhengzhou ,henan province of china. Since it was established in 2008, Henan BEBON has earned an outstanding reputation for its professional exporting shipbuilding steel.About the products,we mainly specialized in steel products for shipbuilding which have been approved by some authoritative classification societies,likeLR,BV,ABS,DNV,GL and so on.

• API 5L X70 Seamless Steel Pipe
  
• API 5L X 70 steel pipe
  
• API 5L X 80 seamless steel pipe, Tanjin and Shanghai port in China
  

• 304J1 stainless steel pipe
  
• 304H stainless steel pipe
  
• 321 stainless steel pipe
  

• API 5L X65 Welded steel pipe
  
• API 5L X48 Welded steel pipe
  
• API 5L X48 Welded steel pipe application,API 5L X48 Welded steel pipe dimensions
  

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Heat reatment introduction normalizing: heat the steel to above the AC3 or ACCM 30-50 C, holding for some time, put out from the furnace , and cool in air or by water, spray,wind. The Intent of this Technology is to make the grain in steel refine and carbide distribute uniformly. hardenning / quenching heats up the steel to critical temperature Ac3 (hypo-eutectoid steel) or Ac1 (hyper-eutectoid steel) above some temperature, keeps warm for some period of time. causes it completely or the partial austenite 1,than cool the steel quickly at the speed which is faster than the speed of critical cooling.