VM 110 13CRSSCY

 

VM 110 13CRSSCY is a super martensitic OCTG steel (also called Super 13%Cr steel) for sweet wet C02 corrosive environments. In order to improve SSC resistance under H2S conditions, the Yield strength and hardness on VM 110 13CRSSCY are controlled to 125 ksi max. and 30 HRC max.

VM 110 13CRSSCY offers corrosion and SSC resistance on a greater usage domain than API L80-13CR in terms of temperature, H2S and chloride content.

VM 110 13CRSSCY is also available with High Collapse performance.

​APPLICATIONS

  • Deep and/or HP/HT production tubing ​and liners exposed to flowing effluents contai​ning CO2
  • For temperatures up to ~180°C (356°F)
  • ​Tarces of H2S

Finer grade selection shall take into account other parameters such as Chloride content and in-situ pH.​​


PERFORMANCES

OCTG carbon steels are known to corrode when exposed to wet CO2 containing environments: they will suffer from various forms of corrosion such as general metal loss corrosion or localized corrosion (pitting, crevice, Mesa attack). Marte​nsitic and Super martensitic steels have proved to be the most cost effective solution to protect against wet CO2 corrosion in oil & gas wells.

Graph1.jpg ​Comparison of Cost vs time for Carbon steel + inhibitors (+ workovers) and for 13%Cr steel in wet C02 well​

VM 110 13CRSSCY is manufactured in accordance with group 1- material category 13-5-2 of the latest edition of API 5CRA and ISO 13680. These standards define one PSL only (PSL 1) for Super 13Cr–110 ksi grade.

In order to improve SSC resistance under H2S conditions, the Yield strength and hardness on VM 110 13CRSS CY are controlled to 125 ksi max. and 30 HRC max in the spirit of PSL 2 of API 5CRA and ISO 13680.

VM 110 13CRSS offers corrosion and SSC resistance on a greater usage domain than API L80-13CR in terms of temperature, H2S and chloride content, as shown on the graphs below:

   Corrosion resistance of Super 13Cr vs API L80-13Cr as a function of temperature and chloride content​​

Resistance to SSC (Sulfide Stress Cracking)

In order to improve SSC resistance under H2S conditions, the Yield strength and hardness tolerances on VM 110 13CRSS are controlled to 125 ksi max. and 30 HRC max. . Various industry publications and Vallourec internal test data showed that SSC resistance of Super 13%CR steels is widely depending on other parameters such as Chloride content, water composition, test method etc. As showed on the pH-H2S diagram below, SSC resistance in the hatched area require close investigation such as fit-for-purpose testing.

Contact Vallourec for more SSC and corrosion test da​ta on Super 13CR steels. 

Graph6.jpg

MECHANICAL PROPERTIES

Yield Strength 
ksi (MPa)
UltimateTensile
Stre​ngth ​ksi (MPa)
Elongation
%
Hardness
HRC​​ ​
​Yound Modulus (GPa)
Min. Max. Min. Min. Mean Max. Min. Max.
110 (758) 140
(965)
 115 
(793)
API 5CRA formula 32​ ​34 170 230
Charpy ​V-notch ​Impact test at​ -10°C (14​°F)​​​
Direction Absorbed energy on a 10x10 mm ​specimen
Transverse 60 ft.lb (80 J)
Longitudinal 74 ft.lb (100 J)​​

FIELD RECORDS

The product is used in the following area:​

  • North Sea & Europe: 4 1/2" to 7"; 12.6# to 32#; VAM​ TOP® series.
  • Africa: e.g. 3 1/2" to 7"; 9.2# to 32#; VAM​ TOP® series.
  • Asia: e.g. 5" to 7"; 23# to 32#, VAM​ TOP® series.
  • Middle East: e.g. 3 1/2" to 9 5/8"; 9.2# to 53.5#; VAM​ TOP® series.
  • South America: e.g. 4 1/2" to 10 3/4"; 12.6# to 60.7#; VAM​ TOP® series, VAM® 21TM, VAM® FJLTM, VAM® SLIJ-IITM.​

​​​​STORAGE & HANDLING RECOMMENDATI​ON

  • Avoid pollution by contact with carbon or low alloy steel (pipes or parts).
  • Avoid atmospheric pollution with iron (e.g. concrete plant).
  • Perform proper cleaning and inspection after rig returns (potential impact of completion fluid).
  • Check VAM® BOOK and Vallourec recommendations for more details on storage, handling, transportation and running of Super 13CR pip​es.​