| Designation |
Symbol |
Description |
| 交貨狀態 |
代號 |
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（lěng）加工（硬） |
最後冷加工之後不進行熱處理， 從而管子隻可能進行很小的變形。 |
| 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) |
| 冷加工（軟） |
最後熱處理之後進行小變形量（liàng）的冷加工， 對鋼管再加工時允許有限的冷（lěng）變形（例如（rú）： 彎曲， 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. |
| 冷加工後消除應力退火 |
最後冷加工後在Acl點以下進（jìn）行退火， 以消除冷加工應力。 |
| Annealed |
utf-8（+A） |
The last Cold forming process is followed by annealing in a controlled atmosphere. |
| 退火（huǒ） |
最後冷（lěng）加（jiā）工之後，鋼管在保護氣體下進行完全退火。 |
| Normalized |
NBK（+N） |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
| 正（zhèng）火 |
最後冷加工之後，鋼管在保護氣（qì）體下進行正（zhèng）火。 |
