EN 10305 Technical delivery conditions for precision steel pipes
EN 10305 : 2002
Technical delivery conditions for precision steel pipes.
According to CEN/CENELEC international norms, The national standards organizations of the following countries jointly implemented the European standard: Australia,Belgium,Czech Republic,Denmark,Finland,France, Germany, Greece, Iceland, Ireland, Malta, Holland, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
En10305.This part specifies the delivery technical conditions of precision cold drawn seamless steel pipe with circular section. Through EN10305 Pipes are accurately dimensioned with specified tolerances and specified surface roughness.Typical applications are in automotive equipment and general industrial engineering.
EN 10305 It includes the following parts. The unified title is： Technical delivery conditions for precision steel pipes.
Part 1. Seamless cold drawn steel pipe.
Part 2.Welded cold drawn steel pipe.
Part 3 Welded cold process steel pipes.
Part 4 Seamless cold drawn steel tubes for hydraulic and pneumatic systems.
Part 5, welding and cold precision processing of square and rectangular steel pipes.
Part 6, welded cold drawn steel tubes for hydraulic and pneumatic systems.
Delivery conditions/Delivery States
|
Designation |
Symbols |
Description |
|
Cold drawn / hard |
+C (BK) |
No heat treatment after the final cold drawing process |
|
Cold drawn / soft |
+LC (BKW) |
After the final heat treatmant there is a suitable drawing pass. |
|
Cold drawn and stress relieved |
+SR (BKS) |
After the final cold drawing process there is a stress relief heat treatment in a controlled atmosphere. |
|
Annealed |
+A (GBK) |
After the final cold drawing process the tubes are annealed in a controlled atmosphere. |
|
Normalized |
+N (NBK) |
After the final cold drawing operation the tubes are normalized in a controlled atmosphere. |
Mechanical properties at room temperature
|
Steel grade |
Minimum values for the delivery condition a,b |
||||||||||||
|
Steel name |
Steel number |
+C c |
+LC c |
+SR |
+A d |
+N |
|||||||
|
Rm Mpa |
A % |
Rm Mpa |
A % |
Rm Mpa |
ReH Mpa |
A % |
Rm Mpa |
A % |
Rm Mpa |
ReH e Mpa |
A % |
||
|
E215 |
1.0212 |
430 |
8 |
380 |
12 |
380 |
280 |
16 |
280 |
30 |
290 to 430 |
215 |
30 |
|
E235 |
1.0308 |
480 |
6 |
420 |
10 |
420 |
350 |
16 |
315 |
25 |
340 to 480 |
235 |
25 |
|
E355 |
1.0580 |
640 |
4 |
580 |
7 |
580 |
450 f |
10 |
450 |
22 |
490 to 630 |
355 |
22 |
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