Properties

These grades are manufactured to the highest quality standards in order to meet the most stringent specifications. The reference standard is API 5L (American Petroleum Institute).

Special requirements such as HIC (hydrogen-induced cracking) resistance or high ductility at low temperature can be met to provide a solution for every pipeline project.

Advantages

ArcelorMittal's steels for pipes have very high tensile strength and excellent toughness at very low temperatures and in heavy gauges. In addition, their special chemical composition with a particularly low carbon equivalent value gives them good weldability. The consistent mechanical properties of these steels improves their forming and welding performance.

Applications

 ArcelorMittal's steels for pipes are particularly suitable for manufacturing:

 

Spiral SAW and straight ERW pipes made with this type of steel are a good alternative to UOE pipes (made from plate from quarto roll mills) or seamless pipes.

 

These steels are used for the production of pipes for the transport of gaseous or liquid materials such as water or oil.

Weldability

The chemical composition of these steels ensures that there is no risk of cold cracking and simply applying the normal welding rules is sufficient to achieve a good quality weld. For SAW welding, the choice of an SA1 AM FCE flux/wire combination for grades up to X46 AM FCE, and an SA2 AM FCE for higher grades, should produce a weld with a coefficient greater than 1 and a good degree of toughness at the centre of the weld.

Brand correspondence

 API 5L:2008EN 10208-2:2009
Grade B AM FCE Grade BL245MB
X42 AM FCE X42L290MB
X46 AM FCE X46-
X52 AM FCE X52L360MB
X56 AM FCE X56-
X60 AM FCE X60L415MB
X65 AM FCE X65L450MB
X70 AM FCE X70L485MB
X80 AM FCE X80L555MB

Dimensions

 

API standard

Thickness (mm)Grade B AM FCE, X42 AM FCEX46 AM FCE, X56 AM FCEX52 AM FCEX60 AM FCEX65 AM FCE, X70 AM FCEX80 AM FCE
Min widthMax widthMin widthMax widthMin widthMax widthMin widthMax widthMin widthMax widthMin widthMax width
5.00 ≤ th < 5.506002135600210060021356002100600210010001785
5.50 ≤ th < 6.001835
6.00 ≤ th < 6.5021351985
6.50 ≤ th < 13.5021352135
13.50 ≤ th < 15.002100
15.00 ≤ th < 15.2580080080010001000
15.25 ≤ th < 17.502100
17.50 ≤ th < 18.002100
18.00 ≤ th < 18.251400
18.25 ≤ th < 20.002100

For thicknesses over 20 mm, please contact us.

 

HIC-resistant

Since the dimensions available are constantly changing, please contact us for specific information.


Mechanical properties

 
Direction
Thickness (mm)
Re (MPa)
Rm (MPa)
A50 (%)
KV 0°C (J)
Re/Rm
DWTT 10C (%)
Grade B AM FCET5 - 25245 - 440415 - 520≥ 22≥ 400.85≥ 100
X42 AM FCET5 - 25290 - 495415 - 585≥ 21≥ 400.85≥ 100
X46 AM FCET5 - 25320 - 525435 - 620≥ 21≥ 400.85≥ 100
X52 AM FCET5 - 25360 - 510460 - 600≥ 20≥ 400.85≥ 85
X56 AM FCET5 - 25390 - 545490 - 645≥ 20≥ 400.85≥ 85
X60 AM FCET5 - 25415 - 565520 - 665≥ 18≥ 400.85≥ 85
X65 AM FCET5 - 25450 - 570535 - 655≥ 18≥ 400.87≥ 85
X70 AM FCET5 - 25485 - 605570 - 675≥ 18≥ 400.90≥ 85
X80 AM FCET5 - 25555 - 675625 - 750≥ 18≥ 400.90≥ 85

The mechanical properties of the pipes will depend on:

  • The Bauschinger effect, which in turn depends on
    • The grade and chemical composition of the steel
    • The type of pipe (ERW or SAW)
    • The type of pipe manufacturing line
  • The post-treatment (full body post-heating/stress relieving post-heating) that is sometimes performed by the client
  • The angle of the weld on spiral tubes (this will influence the direction of the tensile test with respect to the rolling direction)

 

The evolution of the mechanical properties - and in particular of the difference in yield strength between the sheet and the pipe - is specific for each process. It is therefore very important to indicate both the forming and the welding process as well as the aforementioned sheet/pipe difference. An agreement between ArcelorMittal and the client on the coil mechanical properties to be guaranteed must be reached prior to delivery of the coils.

 

The mechanical properties listed above are those of the pipes.

 

The minimum elongation given above refers to a 610 mm diameter pipe with a wall thickness of 12.7 mm.



Chemical composition

  Notes
C (%)
Mn (%)
P (%)
S (%)
Si (%)
Al (%)
Cu (%)
Cr (%)
Ni (%)
Mo (%)
Nb (%)
V (%)
Ti (%)
N (%)
Ceq (%)
Grade B AM FCE 1+2 ≤ 0.220 ≤ 1.20 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 ≤ 0.050 ≤ 0.050 ≤ 0.040 ≤ 0.012 ≤ 0.40
X42 AM FCE 1+2 ≤ 0.220 ≤ 1.30 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 ≤ 0.050 ≤ 0.050 ≤ 0.040 ≤ 0.012 ≤ 0.40
X46 AM FCE 1+2 ≤ 0.220 ≤ 1.40 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 ≤ 0.050 ≤ 0.050 ≤ 0.040 ≤ 0.012 ≤ 0.40
X52 AM FCE 1+2 ≤ 0.220 ≤ 1.40 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.41
X56 AM FCE 1+2 ≤ 0.220 ≤ 1.40 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.43
X60 AM FCE 1+2+3 ≤ 0.220 ≤ 1.40 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.42
X65 AM FCE 1+2+3 ≤ 0.220 ≤ 1.45 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.43
X70 AM FCE 1+2+3 ≤ 0.220 ≤ 1.65 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.43
X80 AM FCE 1+2+3 ≤ 0.220 ≤ 1.85 ≤ 0.025 ≤ 0.015 ≤ 0.45 0.015 - 0.060 ≤ 0.25 ≤ 0.30 ≤ 0.30 ≤ 0.10 - - - ≤ 0.012 ≤ 0.43
1. A ratio Al/N≥ 2 shall be applied.
2. The sum of the percentages by mass of the three elements niobium, titanium and vanadium shall not exceed 0.15%.
3. For these steel grades, a molybdenum content of up to 0.35% can be agreed.


For commercial information (quotations, deliveries, product availability):

For technical questions about these products: flateurope.technical.assistance@arcelormittal.com


All details provided in the ArcelorMittal Flat Carbon Europe S.A. catalogue are for information purposes only. ArcelorMittal Flat Carbon Europe S.A. reserves the right to change its product range at any time without prior notice.