冷拔精密無縫鋼管 Precision cold drawn seamless steel tube
液壓系統用鋼管,汽車用鋼管,廣泛用于液壓系統用鋼管、注塑機用鋼管、液壓機用鋼管、船用鋼管、EVA發泡油壓機械、精密油壓裁斷機用鋼管、制鞋機械、液壓設備、高壓油管、液壓油管、卡套接頭、鋼管接頭、橡膠機械、鍛壓機械、壓鑄機械、工程機械、混泥土泵車用高壓鋼管、環衛車用、汽車行業、造船工業、金屬加工、軍工、柴油機、內燃機、空壓機、建筑機械、農林機械等。
牌號 | 化學成分(%) | ||||
---|---|---|---|---|---|
C max | Si max | Mn | P max | S max | |
St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Steel grade | 化學成分(%) | ||||||
---|---|---|---|---|---|---|---|
Steel name | Steel number | C max | Si max | Mn | P max | S max | Al min |
E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
Steel grade | 冷拔光亮硬態 BK | 冷拔光亮硬態 BKW | 拉拔光亮 消除應力退火 BKS | 退火 GBK | 正火 NBK | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
常用鋼號 | 抗拉強度Rm N/mm min | 伸長率% min | 抗拉強度Rm N/mm min | 伸長率% min | 抗拉強度Rm N/mm min | 屈服強度 ReH N/mm min | 伸長率% min | 抗拉強度Rm N/mm min | 伸長率% min | 抗拉強度Rm N/mm min | 屈服強度 ReH N/mm min | 伸長率% min |
St35 E215 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
St45 E235 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
St52 E355 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
DIN 2391 applies to seamless precision steel tubes and in compliance with ISO/DIN 3304, those tube dimensions have been selected from the range of manufacture dimensions which are mainly used as design elements.
If tubes having the tolerances and are produced according to the technical conditions of deivery as specified in this Standard are to e used as pipelines, then the dimensions specified in DIN 2448 may from time to time be used. These tubes must be ordered according to quality grade C.
DIN 2391 Pipe Seamless Precision Steel Tubes Size:
Outside Diameter (Nominal Size ): 4 - 260 mm
Wall Thickness: 0,5 - 25 mm
Delivery condition:BK ,BKW,BKS,GBK,NBK
Application: Industrial and Mechanical, Automotive
Notes:
DIN 2391 Seamless Precision Steel Tubes Mechanical Properties (Mpa)
DIN 2391 Seamless Precision Steel Tubes Chemical composition(%)
Note: a: Cold-finished/hard b: Cold-finished/soft c: Annealed d: Normalized |
Delivery status | Abbreviation | Description |
Cold-finished/hard (Cold-finished as-drawn) | BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
Cold-finished/soft (lightly cold-worked) | BKW | After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |
EN-10305+DIN-2391_Seamless_precision_steel_tubes.pdf
EN-10305-1_DIN-2391_UNI-7945-79_Seamless_precision_steel_tubes 性能參數對照表.pdf
DIN 2391 與 EN 10305-1 性能對比.pdf