Corrosion Resistant Alloys

CRA

Tenaris provides 13% Chromium grades and Corrosion Resistant Alloys (CRA) for oil and gas operations in highly corrosive environments where carbon pipe cannot be used.

Proprietary steel grades for severe corrosive environments

In most conditions when the partial pressure of CO2 is above 30psi, carbon steels present high corrosion rates. Steel grades alloyed with high contents of Chromium (Cr), Molybdenum (Mo) and Nickel (Ni) are able to effectively resist corrosion.

We manufacture 13% Chromium tubular products in our mills. We supply Corrosion Resistant Alloys through our alliances with Sandvik and PCC Energy Group.

The development of ultra deep gas wells and enhanced recovery of oil and gas implies more aggresive environment, with higher downhole temperatures and corrosive gases.

13% Chromium and Super 13% Chromium Grades

Our group of 13%Cr alloys are martensitic stainless steels suitable for applications involving CO2 rich environments. 13CrS can be used in mild sour conditions. 13CrM and 13CrS have better performance with regards to corrosion resistance and excellent toughness.

Data Table

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Mechanical Properties and
Chemical Composition



Corrosion Resistant Alloys (Above 13% Cr)

Tenaris has established alliances with Sandvik and PCC Energy Group to assist the oil and gas industry in this particular segment. We commercialize both companies’ seamless, stainless steel downhole production tubing and other high performance products.

Sandvik and PCC Energy Group manufacture CRA products according to the API 5CRA and ISO 13680 international standards. These CRA materials are needed when there is a combination of the following factors:

  • Presence of C02
  • Presence of H2S
  • Low pH
  • Chlorides
  • High temperature

Data Table

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Mechanical Properties