Delivery Time:25~35days
Certification:ISO9001 14001 BV TUV PED DNV etc
Thin Wall DIN 2391 Normalized Seamless Steel Tubes with Phosphating Surface , St35 Precision Tube
Quick Detail:
Standard: DIN 2391
Grade: St 30 Si / St 30 Al / St 35 / St45 / St 52
Size:(mm)
Out Dimensions: 6 mm ~ 350 mm
Wall Thickness: 0.8 mm ~30mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)
Description:
Main grade we supply for DIN 2391
St 30 Si / St 30 Al / St 35 / St45 / St 52
Delivery Condition:
Heat treatment,Annealed, Normalized, Normalized and Tempered
Packing:
Beveled/black painting/ plastic caps/ in bundles/ steel strips/ wooden protection
Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength,Elongation, Flaring, Flattening, Bending, Hardness, Impact Test),Surface and Dimension Test,Nodestructive Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Painting as requested.
Chemical Composition:
|
Steel grade |
Chemical composition, as a percentage by mass |
|||||
|
Symbol |
Material number |
C |
Si |
Mn |
P |
S |
|
St 30 Si |
1.0211 |
0.10 |
0.30 |
<=0.55 |
0.025 |
0.025 |
|
St 30 Al |
1.0212 |
0.10 |
0.05 |
<=0.55 |
0.025 |
0.025 |
|
St 35 |
1.0308 |
0.17 |
0.35 |
<=0.40 |
0.025 |
0.025 |
|
St 45 |
1.0408 |
0.21 |
0.35 |
<=0.40 |
0.025 |
0.025 |
|
St 52 |
1.0580 |
0.22 |
0.55 |
<=1.60 |
0.025 |
0.025 |
|
The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%. |
Final supply conditions:
|
Designation |
Symbol |
Description |
|
Cold finished (hard) |
BK |
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation. |
|
Cold finished (soft) |
BKW |
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 |
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 |
The last cold forming process is follow |
