VM 85 13CR

​                   ​       85 13cr.jpg
VM 85 13CR is a martensitic OCTG steel (also called 13%Cr steel) for sweet wet CO2 corrosive environments. VM 85 13CR offers a minimum YS of 85 ksi to maximize the pipe capacity (burst, tensile, collapse). VM 85 13CR is also available with High Collapse performance (VM 85 13CRHC).


  • Production tubing and liners exposed to flowing effluents containing CO2
  • For temperatures up to ~150°C (302°F)​
  • For limited amount of H2S

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


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). 

Martensitic steel has proved to be the most cost effective solution to protect against wet CO2 corrosion in Oil & Gas wells.


Comparison of Cost vs time for Carbon steel + inhibitors (+ workovers) and for 13%Cr steel in wet CO2 well

VM 85 13CR offers minimum YS​ of 85 ksi to maximize the pipe capacity (burst, tensile, collapse), as well as better toughness, tighter chemical composition, finer grain size, and more stringent inspection requirements than API 5CT PSL 2 for L80-13CR:

  • Non Destructive Examination: Ultrasonic ins​pection + Electro-Magnetic inspection according to API SR2 (5% of the specified wall thickness).
  • Wall thickness is measured and recorded on 100% of the pipe surface.

VM 85 13CR is also available with High C​ollapse performance (VM 85 13CRHC)

Resistance to SSC (Sulfide Stress Cracking)

VM 85 13CR resistance to SSC is limited to small amounts of H2S and also depends on in-situ pH and chloride. Contact your Vallourec representative for more SSC and corrosion test data on 13CR steels. 


Yield Strength
ksi (MPa)
​Ultimate Tensile 
Strength ksi (MPa)
HRC​​ ​
Min. Max.​ Min. Min. Max.
Charpy ​V-notch ​Impact test at​ -10°C (14​°F)​​​
Direction Absorbed energy on a 10x10 mm specimen
Transverse 18 ft.lb (25 J)
Longitudinal​ 38 ft.lb (51 J)


The product is used in the following areas:

  • Gulf of Mexico: 4 1/2", VAM® TOP HCTM
  • Gulf of Mexico: 4 1/2", 115​#, VAM® TOP HCTM 
  • South America: 9 5/8", VAM® TOPTM
  • North America​​​: 9 5/8", 13​​​#, VM 110 ​HCSS



  • 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 13CR pipes.​