This Standard specifies classification, code, dimension, shape, weight, permissible deviations, technical requirements, test methods, inspection rules, packaging, marking, and quality certificate of cold-drawn or cold-rolled precision seamless steel tubes. This Standard is applicable to cold-drawn or cold-rolled precision seamless steel tubes that require special dimensional accuracy and high surface quality, and that are used for manufacturing mechanical structure, hydraulic equipment, auto parts, etc.
Basic Data
Standard ID
GB/T 3639-2009 (GB/T3639-2009)
Description (Translated English)
Seamless cold-drawn or cold-rolled steel tubes for precision applications
National Standard Approval Announcement 2009 No.12 (Total No.152)
Issuing agency(ies)
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary
This standard specifies the cold drawn or cold rolled precision seamless classification, Code, dimensions, shape, test methods, , weight and tolerance, technical requirements for inspection rules, packaging, marking and quality certification. This standard applies to the manufacture of mechanical structures, hydraulic equipment, automotive parts which have drawn or cold rolled precision seamless special high dimensional accuracy and surface quality requirements.
