ArcelorMittal USA

Sour Service LinepipeData Sheet

In response to industry demand, ArcelorMittal USA has developed hot-rolled coiled skelp products for sour service applications with good resistance to Hydrogen Induced Cracking (HIC) and Sulfide Stress Corrosion Cracking (SSCC). Skelp refers to a control rolled high-strength low-alloy (HSLA) steel used as feedstock to produce pipe that is formable and weldable and meets stringent toughness requirements. The high strengths are achieved through a combination of grain and microstructural refinement and precipitation strengthening.

For sour service applications, ultra-clean steel production practices and control of centerline segregation at the caster are required. Low sulfur practices and ladle metallurgy utilizing both argon and electromagnetic stirring ensure a high degree of steel cleanliness. Centerline segregation is minimized by: • chemistry design • control of tundish superheat and casting speed • maintenance of caster alignment and roll gap control

• Calcium treated • No intentional addition of nitrogen or boron

WeldabilityThe microalloyed skelp has a low carbon equivalence (CEIIW or Pcm) resulting in product that has excellent weldability: • high HAZ toughness • resistance to cold cracking • Suitable for electric resistance welding (ERW), submerged arc

welding (SAW) and double submerged arc welding (DSAW) during pipe making and shielded metal arc welding (SMAW) during field girth welding.

Technical AssistanceFor additional information and assistance, please contact ArcelorMittal. Our Sales representatives and Technical Service Engineers are ready to assist you.

T +1 800 422 9422E energypipeinquiries@arcelormittal.com

See Mechanical Properties on next page.Product Dimensions and Ranges for HSM Coils

Thickness(inches)

Width

Min (inches) Max (inches)

Up to 0.500* 42 77

* HR coils over 0.500” are currently available from our sister plants in Europe and, starting 1Q 2012, from ArcelorMittal USA. Please inquire.

The above range allows for pipe production with outer diameters (OD) of 12.75 – 24 inches. For certain combinations of thickness and width, there may be minimum coil size requirements.

Chemical Composition – Primary alloying for HSM Grades

API 5L/ISO 3183Maximum percent

Mn NbX42MS L290MS 0.60 0.040

X46MS L320MS 1.00 0.050

X52MS L360MS 1.00 0.050

X56MS L390MS 1.20 0.060

X60MS L415MS 1.20 0.060

X65MS L450MS 1.20 0.080

X70MS L485MS 1.20 0.080

ArcelorMittal USA1 South Dearborn Street18th FloorChicago, IL 60603USAT +1 800 422 9422E energypipeinquiries@arcelormittal.com

www.arcelormittal.com October 2010

The microstructure consists of acicular ferrite with ASTM grain size 9 or finer.

The mechanical properties listed above are those in the pipe.

The measured difference in yield strength between the sheet and the pipe is specific for each mill and would depend on several interrelated factors, such as: • Bauschinger effect • Chemical composition • Type of manufacturing line • Microstructure • D/t (ratio of pipe diameter to pipe wall thickness) • Post treatment (e.g. full body post-heating, coating, stress relieving, etc.)

Therefore, an agreement between ArcelorMittal and the pipe producer on the coil mechanical properties to be guaranteed must be reached prior to delivery of the coils.

Mechanical Properties

ISO/API Grade YS (MPa)

YS (ksi)

TS (MPa)

TS (ksi)

Y/T (max)

CVN 32ºF (ft-lbs)

CVN 0ºC (J)

DWTT 0ºC/32ºF (%)

L290M/X42S 290-495 42.1-71.8 415-760 60.2-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L320M/X46S 320-525 46.4-76.1 435-760 63.1-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L360M/X52S 360-530 52.2-76.9 460-760 66.7-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L390M/X56S 390-545 56.6-79.0 490-760 71.1-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L415M/X60S 415-565 60.2-81.9 520-760 75.4-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L450M/X65S 450-600 65.3-87.0 535-760 77.6-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

L485M/X70S 485-635 70.3-92.1 570-760 82.7-110.2 0.93 ≥ 20 ≥ 27 ≥ 85

API: American Petroleum InstituteCEIIW: Carbon equivalent, based on the International Institute of Welding equation -

per API, used for steels with carbon contents over 0.12%CVN: Charpy V Notch EnergyDWTT: % shear fracture in Drop-weight Tear Testft-lbs: Foot-poundsISO: International Organization for StandardizationJ: Joulesksi: Kilo-pounds per square inch

Mn: ManganeseMPa: MegapascalsNb: Niobium (also referred to as Columbium, Cb)Pcm: Carbon equivalent, based on the chemical portion of the Japanese (Ito-Bessyo)

weldability equation – per API, used for steels with carbon contents of 0.12% or less

TS: Tensile strength (designated by Rm in API specifications)Y/T: Yield (strength) to tensile (strength) ratio; or Rt0.5 /Rm

YS: Yield strength at 0.5% total elongation (designated by Rt0.5 in API specifications)