bebon steel

Tel:0086-0371-86151827

E-mail:sales7@bebonchina.com
Contact us
  • : 0086-371-86151627 0086-371-86151827
  • : 0086-371-86011881
  • : sales7@bebonchina.com
  • : sales7@bebonchina.com
  • : Taya bebon
Products
BEBON STEEL - product - Steel for large diameter pipes steel plate

Steel for large diameter pipes steel plate

Also referred to as Atmospheric Corrosion Resistant Steel, this product is seen as an inexpensive and highly effective material to be used in structural applications which are exposed to the atmospheric elements.

The steel oxidises with pollutants in the air forming a thick layer of rust – this formation acts as a protective layer which prevents the steel from corroding. The layer constantly regenerates and forms over time.

Steel for large diameter pipes

Usage
Large-diameter pipes are predominantly used for carrying gas and liquids under high pressure and as piling pipes. Standards1)

Europa Material no. D USA FK2)
EN 10208-2   DIN 17172 API 5L  
L245NB 1.0457 StE 240.7 Gr. B A
L290NB 1.0484 StE 290.7 X 42 A
L360NB 1.0582 StE 360.7 X 52 B
L245MB 1.0418 StE 240.7 Gr. B A
L290MB 1.0429 StE 290.7 TM X 42 A
L360MB 1.0578 StE 360.7 TM X 52 B
L415MB 1.8973 StE 415.7 TM X 60 C
L450MB 1.8975 StE 445.7 TM X 65 C
L485MB 1.8977 StE 480.7 TM X 70 D

1) OTDer standards or specifications by agreement
2) FK = Tensile strengTD class, Dimensions

Large-diameter pipes  Chemical composition in percent by weight [%] (Heat analysis)

Grade  C Si Mn P S Ti V Nb Other  CE3)
EN 10208-2 max. max. max. max. max. max. max. max.   max.
L245NB 0,161) 0,40 1,11) 0,025 0,020 - - - 4) 0,42
L290NB 0,171) 0,40 1,21) 0,025 0,020 0,04 0,05 0,05 4) 0,42
L360NB 0,201) 0,45 1,61) 0,025 0,020 0,04 0,10 0,05 4), 5) 0,45
L245MB 0,161) 0,45 1,51) 0,025 0,020 0,04 0,04 0,04 4) 0,40
L290MB 0,161) 0,45 1,51) 0,025 0,020 0,04 0,04 0,04 4) 0,40
L360MB 0,161) 0,45 1,61) 0,025 0,020 0,04 0,05 0,05 4) 0,41
L415MB 0,161) 0,45 1,61) 0,025 0,020 0,06 0,08 0,05 4), 5) 0,42
L450MB 0,161) 0,45 1,61) 0,025 0,020 0,06 0,10 0,05 4), 5) 0,43
L485MB 0,161) 0,45 1,71) 0,025 0,020 0,06 0,10 0,06 4), 5) 0,43
                     
API 5 L                    
Gr. B 0,26 - 1,15 0,030 0,030 - - - - -
X 42 0,282) - 1,252) 0,030 0,030 - - - - -
X 46 0,282) - 1,252) 0,030 0,030 - - - - -
X 52 0,282) - 1,252) 0,030 0,030 - - - - -
X 56 0,262) - 1,352) 0,030 0,030 - - - - -
X 60 0,262) - 1,352) 0,030 0,030 - - - - -
X 65 0,262) - 1,402) 0,030 0,030 - - - - -
X 70 0,231) - 1,602) 0,030 0,030 - - - - -

1) For a reduction by 0,01 % each below the max. carbon content an increase of the manganese content
    by 0,05 % above the max. value is permissible, the increase being limited to 0,2%
2) For a reduction by 0,01 % each below the max. carbon content an increase of the manganese content
    by 0,05 % above the max. content is permissible, the increase being limited to 1,40 % for
    steel grades = X 52, to 1,60 % for steel grades > X 52, and 2,0% for steel grade X 70.
3) A max. carbon equivalent
    CE = C + Mn/6 + (Cr + Mo + V)/5 + (Cu + Ni)/15
   can be agreed upon. CE is determined for the check analysis only.
4) 0,015 ≤ Altotal< 0,060; N = 0,012; Al/N = 2;
    Cu = 0,25; Ni = 0,30; Cr = 0,30; Mo = 0,10
5) The total V, Nb, and Ti - contents must not exceed 0,15 %.

Large-diameter pipes  Cold-forming
Cold-forming processes such as bending, flanging, expanding etc. can be easily carried out. A subsequent heat treatment is usually unnecessary.
Large-diameter pipes Heat treatment
Normalised and stress relief annealing of the normalised rolled steel grades is possible. Since normalised and stress relief annealing above 580 °C of the thermomechanically rolled steel grades may cause a decrease of yield point and tensile strength, both heat treatment methods should be avoided.
Large-diameter pipes Welding
Observing the general technical directions, the steel is weldable by hand as well as mechanically according to all electric processes. A preheating of the steel for welding purposes is not necessary if normal laying conditions prevail. It has to be taken into account that the behaviour of this steel during welding and thereafter depends not only on the material but also on the conditions of welding the pipeline and may thus be impaired.

 

 

Get a quoteCheck Here

To find out more about BEBON and the weathering steels on offer click the information links at the top of this page. If you want to make an enquiry or receive a competitive quotation, CLICK HERE to contact us.