Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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EN10305-1 E235 E355 +N Cold Drawn Precision Products Seamless Steel Tube
Description:
EN10305-1 standard specifies seamless cold drawn precision steel tubes. These tubes, typically made from E235 or E355 grades with a normalized delivery condition (+N), offer high dimensional accuracy and surface quality. Ideal for precision engineering applications, they undergo cold drawing to achieve tight tolerances. Manufactured with precision, these tubes exhibit excellent mechanical properties, making them suitable for various industrial uses such as hydraulic systems, automotive components, and more.
| Mechanical properties at room temperature | |||||||||
| Delivery Condition | BK | BKW | GBK | NBK (N) | |||||
| Steel Grade | Rm | A % | Rm | A % | Rm | A % | Rm | ReH | A % |
| Mpa (Min) | (Min) | Mpa(Min) | (Min) | Mpa(Min) | (Min) | Mpa(Min) | Mpa(Min) | (Min) | |
| E215 | 430 | 8 | 380 | 12 | 280 | 30 | 290~430 | 215 | 30 |
| E235 | 480 | 6 | 420 | 10 | 315 | 25 | 340~480 | 235 | 25 |
| E255 | 580 | 5 | 520 | 8 | 390 | 21 | 440~570 | 255 | 21 |
| E355 | 640 | 4 | 580 | 7 | 450 | 22 | 490~630 | 355 | 22 |
Delivery condition of seamless cold drawn mechanical tubing:
BK (+C) Cold finished/hard (cold finished as drawn).
BKW (+LC) Cold finished/soft
BKS (+SR) Cold finished/stress relieve annealed.
GBK (+A) Annealed.
NBK (+N) Normalized.
