| Material Name |
St35 |
St45 |
St52 |
| chemical analysis |
C: ≤0.17;Si: ≤0.35;Mn: ≥0.40;P: ≤0.025; S: ≤0.025; |
C: ≤0.21;Si: ≤0.35;Mn: ≥0.40;P: ≤0.025; S: ≤0.025 |
C:≤0.22;Si: ≤0.55;Mn: ≤1.60;P: ≤0.025; S: ≤0.025 |
| Tensile Strength |
BK, ≥480MPa; BKW, ≥420MPa;BKS, ≥420MPa;GBK, ≥315MPa;NBK,340-470MPa |
BK, ≥580MPa; BKW, ≥520MPa;BKS, ≥520MPa,GBK, ≥390MPa, NBK 440-570MPa |
BK, ≥640MPa; BKW, ≥580MPa;BKS, ≥580MPa;GBK, ≥490MPa;NBK,490-630MPa |
| Yield strength |
BKS, ≥315MPa; NBK, ≥235MPa |
BKS,≥ 375MPa;
NBK≥255MPa
|
BKS, ≥420MPa; NBK, ≥355MPa |
| Standard |
DIN2391 |
| Length |
5-5.8M, 5.8M fixed length, or as customer's request |
| Packaging |
Bundles Package, wooden box |
| Heat Treatment/ Delivery Condition |
1.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
2.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)
3.Cold finished and stress-relieved annealing 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.
4.Annealed GBK(+A)
The last Cold forming process is followed by annealing in a controlled atmosphere.
5.Normalized NBK(+N)
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
|
| Delivery Time |
45 days |
| Payment Term |
30% TT in advance, Balance to be paid before shipment |
| Usage/Application |
Truck drag link, automotive parts |
| Surface |
free of oxide scale, bright |
Keywords: DIN2391, Seamless steel tubes, Bright Annealing Tubes
