| Designation |
Symbol |
Description |
| 寄遞情況 |
商（shāng）標 |
作出說明 |
| Cold finished (hard) |
BK（+C） |
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation |
| 冷進行加工（硬） |
最終冷進行加工隨（suí）後不（bú）開展熱采用相應（yīng）辦法解決， 進而管材隻或許（xǔ）開展（zhǎn）最小的蛻變。 |
| Cold finished (Soft) |
BKW
（+LC） |
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding) |
| 冷進行加工（軟） |
最終熱（rè）采用相（xiàng）應辦法解決隨後開展小蛻變量的冷進行加工， 對無縫鋼管再（zài）進行加工時決定著名的（de）冷蛻變（biàn）（比如： 躬身行禮， 擴口） |
| Cold finished and stress-relieved |
BKS（+SR） |
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| 冷進行加工後需要剪應力退學 |
最終（zhōng）冷進行加工後在Acl點這陣（zhèn）兒開展退學， 以需要冷進行（háng）加工剪（jiǎn）應（yīng）力。 |
| Annealed |
utf-8（+A） |
The last Cold forming process is followed by annealing in a controlled atmosphere. |
| 退學 |
最終冷進行加工隨後，無縫鋼管在維護固體下開展全部（bù）退學。 |
| Normalized |
NBK（+N） |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
| 正火（huǒ） |
最終冷進（jìn）行加工隨後，無縫鋼管在維護固體下開展正火（huǒ）。 |
