DIN1629 COLD DRAWN SEAMLESS UNALLOYED STEEL TUBE WITH SPECIAL REQUIREMENTS
Specifications:
Surface Treatment: Oiling/Black painting/Varnish/Passivation/Phosphating/Pickling
Ends: PE, ends caps
Marking: as per requirement
Delivery Condition: Annealed/Normalized/Tempered
Size:(mm)
As per standard or as per customer’s requirement
Length: ≤16m. Fixed Length (6m,9m,12m, 16m or as per requirement) or random length
Package: Hexagonal Bundles with steel strips and plastic wrapping outside/Wooden box/Wooden crate/Steel frame/As per customer’s requirement
CHEMICAL COMPOSITION (%):
|
CHEMICAL COMPOSITION (CAST ANALYSIS) IN% |
|||||
|
Steel Grade |
C |
P≤ |
S≤ |
N (1) |
|
|
St 37.0 |
1.0254 |
≤0.17 |
0.040 |
0.040 |
0.009(2) |
|
St 44.0 |
1.0256 |
≤0.21 |
0.040 |
0.040 |
0.009(2) |
|
St 52.0 |
1.0421 |
≤0.22 |
0.040 |
0.035 |
- |
MECHNICAL PROPERTIES:
|
STEEL GRADE |
Tensile Strength σb(Mpa) N/mm2 |
Yield Strength σs(Mpa) (WT in mm) |
Elongation δ(%) (L=5do) |
|||||
|
≤16 |
16≤40 |
40≤60 |
I |
T |
||||
|
(MIN) N/mm2 |
% (MIN) |
|||||||
|
St 37.0 |
1.0254 |
350-480 |
235 |
225 |
215 |
25 |
23 |
|
|
St 44.0 |
1.0256 |
420-550 |
275 |
265 |
255 |
21 |
19 |
|
|
St 52.0 |
1.0421 |
500-650 |
355 |
345 |
335 |
21 |
19 |
|
INSPECTION AND TEST:
CHEMICAL COMPOSTION TEST. MECHANICAL PROPERTIES TEST(tensile strength, yield strength, elongation, flaring, flattening,impact, etc). SURFACE AND DIMENSION CHECK. NON-DESTRUCTIVE TEST(eddy current test/ultrasonic test), HYDRAULIC TEST.
Description:
DIN1629 applies to non-alloy steel seamless circular tubes which are used in chemical equipment, vessel, pipe-line, and machine design..
Top quality products
Applications:
Mainly used in chemical equipment, vessel, pipe-line, and machine design. etc.
Competitive Advantage:
Always put quality on first consideration makes us keep our qulity stable and good. Always put customer’s benefit before ours makes our good service and gain us good reputation.
Advanced equipments. Sincere , truth and careful attitude on communication and production.
