12mm 24mm DOM Drawn Over Mandrel Cold Drawn Seamless Mechanical Round Steel Tubing
TORICH is a professional steel tubes manufacturer from China with over 23 years manufacturing and exporting experience.
Our main products areDOM precision pipe,carbon steel Drawn Over Mandrel Cold draw pipe,alloy steel seamless Mechanical round steel tubing, stainless steel seamless precision pipe.The material we usually use for producing DOM seamless Mechanical round steel tubes as per DIN2391 EN10305 A519 is10#,20#,1010,1020,1026,ST37,ST44,E235,E215,E355,
4130,4140 etc
Chemical Composition
| Steel grade |
C
max. |
Si
max. |
Mn
max. |
P
max. |
S
max. |
Altot
min. |
| Name |
Number |
| E215 |
1.0212 |
0.10 |
0.05 |
0.7 |
0.025 |
0.015 |
0.025 |
| E235 |
1.0308 |
0.17 |
0.35 |
1.2 |
0.025 |
0.015 |
-- |
| E355 |
1.0580 |
0.22 |
0.55 |
1.6 |
0.025 |
0.015 |
-- |
Mechanical Properties
| Steel grade |
Yield strengtha |
Tensile strength |
Elongation |
| Name |
Number |
ReH |
Rm |
A |
| min. |
min. |
min. |
| MPa |
MPa |
% |
| E215 |
1.0212 |
215 |
290 to 430 |
30 |
| E235 |
1.0308 |
235 |
340 to 480 |
25 |
| E355 |
1.0580 |
355 |
490 to 630 |
22 |
Features:
1.High tolerance
2.High concentricity
3.Good quality raw material ,Like Baosteel,Zhongtian etc
4. Good service
Delivery Condition
| Designation |
Symbol |
Description |
| 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 |
| 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) |
| 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. |
| Annealed |
GBK(+A) |
The last Cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized |
NBK(+N) |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
|
Packages:
In bundles or in wooden box packages.
