TC-50 casing
244.48×8.94mm tc-50 is a new steel grade independently developed by our company.Compared with the similar steel grades J55 and K55,the steel grade has small grain size,pearlite+ferrite structure,no widmanstatten structure and reticular ferrite structure,and the chemical composition P,s content is far lower than API 5CT
关键词:
casing
steel
grade
same
standard
隐藏域元素占位