Limestone Quarry Plant

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Seamless Steel Pipe DIN1629 ST44,COLD DRAW LOW STEEL PIPE


 
Seamless Steel Pipe DIN1629 ST44
 
Standard: DIN 1629
Steel grade: ST44.0
Delivery condition: Hot-finished
Size range: OD Φ16.7MM-Φ219.1MM, WT 2MM-35MM
Tolerance: according to DIN 1629
Length: customized according to requirements.
Certificate: EN10204/3.1
 
GENERAL INFORMATION:
Tubes made of un-alloyed steel suitable for the construction of chemical plant, vessels, pipe work and for general mechanical engineering purposes.
ST44.0 COLD DRAW STEEL PIPE,Seamless Steel Pipe DIN1629 ST44
DELIVERY CONDITION
Steel grade Delivery condition
ST37.0 Hot-finished
ST44.0 Hot-finished
ST52.0 Hot-finished
 
CHEMICAL COMPOSITION( CAST ANALYSIS) IN%
Steel grade C Si   p S
max Mn max max
ST37.0 0.17 -- -- 0.040 0.040
ST44.0 0.21 -- -- 0.040 0.040
ST52.0 0.22 -- -- 0.040 0.035
 
MECHANICAL PROPERTIES
Steel
grade
Yield strength
Min (Mpa)
Tensile strength
Min(Mpa)
Elongation A
Min(%)
T min mm
≤16 >16
≤40
ST37.0 235 225 350-480 25
ST44.0 275 265 420-550 21
ST52.0 355 345 500-650 21
Note: T: thickness; L: longitudinal

 

The Tolerance of Length:

The Type of Length

The Tolerance

mm

≤6m +100
>6m      ≤12m +150mm
>12m according to the negotiation

 

The Toleracne of  Diameter :

The Diameter

mm

The Tolerance
≤100 ±1% da  ( ±0.5mm is alsiviable )
100<da≤200 ±1% da
>200 ±1% da

 

The Tolerance of the Wall Thickness:

The tolerance is according to the diameter
da≤130mm 130mm<da≤320mm 320mm<da≤660mm
Wall Thickness  S
≤2 2•Sn<S≤4•Sn >4•Sn ≤0.05da 0.05da<S≤0.11da >0.11da ≤0.05da 0.05da<S≤0.09da >0.09da

+15%

-10%

+12.5%

-10%

+17.5%

-12.5%

+17.5%

-12.5%

±12.5% ±10%

+20%

-15%

+15%

-12.5%

+12.5%

-10%

 

 

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