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Help CenterDIN1630 High Performance Seamless Circular Steel Tubes , Black Carbon Steel Pipe
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Certification:ISO9001, ISO14001, PED
DIN1630 HIGH PERFORMANCE SEAMLESS CIRCULAR UNALLOYED STEEL TUBES
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)
OD: ≤660mm
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% |
||||||
|
Grade |
C≤ |
Si≤ |
Mn |
P≤ |
S≤ |
|
|
ST 37.4 |
1.0255 |
0.17 |
0.35 |
≥ 0.35 |
0.040 |
0.040 |
|
ST 44.4 |
1.0257 |
0.20 |
0.35 |
≥ 0.40 |
0.040 |
0.040 |
|
ST 52.4 |
1.0581 |
0.22 |
0.55 |
≤ 1.60 |
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) |
IMPACT (DVM—TEST SAMPLE) |
|||||||
|
≤16 |
＞16≤40 |
＞40≤65 |
L |
T |
L |
T |
|||||
|
(MIN) N/mm2 |
% (MIN) |
δ (MIN) |
|||||||||
|
ST 37.4 |
1.0255 |
350-480 |
235 |
225 |
215 |
25 |
23 |
43 |
27 |
||
|
ST 44.4 |
1.0257 |
420-550 |
275 |
265 |
255 |
21 |
19 |
43 |
27 |
||
|
ST 52.4 |
1.0581 |
500-650 |
355 |
345 |
335 |
21 |
19 |
43 |
27 |
||
DIMENSION TOLERANCE:
|
OD (mm) |
Permissible daviation in OD |
|
|
Tube Barrel and tube ends |
At tube ends, subject to particular agreement 1) |
|
|
≤ 100 |
±1% (value up to ±0.5mm are permitted) |
± 0.4 mm |
|
100 − 200 |
±1% |
± 0.5% |
|
> 200 |
±1% |
± 0.6% |
|
Length Tolerance (mm) |
||
|
≤6000 |
0 - +10 |
|
|
6000<L≤12000 |
0 - +15 |
|
|
>12000 |
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