Alloys

Martensitic Stainless Steels are used extensively in sweet (CO2) environments where carbon and low alloy steels experience general corrosion from the effects of CO2 , H2S, chlorides, pH, and temperature. Standard 13 Chrome and Super 13 Chrome are approved for slightly sour environments in accordance with NACE MR0175/ISO 15156.

Martensitic Stainless Steels are quenched and tempered, resulting in a yield strength ranging from 80 – 140 ksi.

13 Chrome

UNS S42000
Corrosion Resistance: Mild
13 Chrome Datasheet


13 Chrome L80, UNS S42000, is a quenched and tempered martensitic stainless steel used for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments up to 300°F and commonly used as downhole tubulars, components, packers, and other subsurface equipment.
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Modified 13 Chrome

Corrosion Resistance: Mild
Modified 13 Chrome Datasheet


The Modified 13 Chrome alloys, 13CRM & HP-1, are quenched and tempered martensitic stainless steels intended for corrosion resistance in sweet (CO2) environments containing chlorides up to 350°F. Relative to 13 Chrome, the Modified 13 Chromes provide increased strength and corrosion resistance at higher temperatures and chloride concentrations.
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Super 13 Chrome

UNS S41426 • HP-2
Corrosion Resistance: Mild
Super 13 Chrome Datasheet


The Super 13 Chrome alloys, UNS S41426 and HP-2, are quenched and tempered martensitic stainless steels intended for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments with moderate chloride content up to 350°F.
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15 Chrome

Corrosion Resistance: Mild
15 Chrome Datasheet


15 Chrome, or Super 15 Chrome, is a quenched and tempered martensitic-ferritic stainless steel intended for corrosion resistance in sweet (CO2) environments with moderate chloride content, requiring high strength up to 400°F. 15 Chrome offers improved mechanical properties and increased resistance to the effects of CO2 , chlorides, pH, and temperatures when compared with standard 13 Chrome.
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17 Chrome

Corrosion Resistance: Mild
17 Chrome Datasheet


17 Chrome is a quenched and tempered martensitic-ferritic stainless steel intended for corrosion resistance in sweet (CO2) environments with moderate chloride content, requiring high strength up to 400°F. 17 Chrome may be considered as a cost-effective alternative to duplex stainless steels such as 22 Chrome for higher pressure and temperature HPHT conditions.
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Duplex Stainless Steels are used in sweet (CO2) environments containing high chlorides or dissolved oxygen where pitting and crevice corrosion are a concern, sweet (CO2) high-pressure, high-temperature (HPHT) environments, and slightly sour conditions within the guidelines of NACE MR0175/ISO 15156.

Super Duplex Stainless Steels, defined by a PREN (Pitting Resistance Equivalence) greater than 40, extend the useful range of Duplex Stainless Steels in environments with high chlorides or dissolved oxygen, such as seawater or water injection wells.

Cold worked tubes are available in yield strengths up to 140 ksi.

22 Chrome

UNS S31803
Corrosion Resistance: Moderate
22 Chrome Datasheet


22 Chrome, UNS S31803, also referred to as 2205 Duplex or Duplex 22 Chrome, is a cold hardened duplex stainless steel intended for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments with moderate chloride content, requiring high strength up to 400°F.
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25 Chrome

UNS S31260
Corrosion Resistance: Moderate
25 Chrome Datasheet


25 Chrome, UNS S31260, also referred to as 2507 Duplex or Duplex 25 Chrome, is a cold hardened duplex stainless steel intended for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments with high chloride content, requiring high strength up to 450°F.
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Super 25 Chrome

UNS S32760 • UNS 39274
Corrosion Resistance: Moderate
Super 25 Chrome Datasheet


Super Duplex 25 Chrome grades, 25CRW & 25CRS, are cold hardened duplex stainless steels intended for corrosion resistance in sweet (CO2) and moderately sour (H2S) environments with high chloride content, requiring high strength up to 450°F. The “Super” designation indicates that it has a Pitting Resistance Equivalence (PREN) ≥40.
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Solid Solution Nickel Base Alloys are used primarily in sour environments where the partial pressure of H2S exceeds 3 psi. Their useful range of temperature, H2S, and chlorides is extended by increasing additions of nickel, molybdenum, and other elements. In addition to excellent resistance to chlorides and H2S, they eliminate the risk of hydrogen embrittlement that can occur with heat-treated alloys.

These alloys are typically used in severely corrosive environments and are available in cold-worked condition in yield strengths up to 160 ksi.

28 Chrome

UNS N08028
Corrosion Resistance: High
28 Chrome Datasheet


28 Chrome, UNS N08028, or Alloy 28, is a cold hardened nickel-based alloy intended for corrosion resistance in highly sour (H2S) environments with moderate chloride content, requiring high strength up to 350°F.
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2535

UNS N08535
Corrosion Resistance: High
2535 DatasheetCRA 2535E Datasheet


Alloy 2535, UNS N08535, is a cold hardened nickel-based alloy intended for corrosion resistance in highly sour (H2S) environments with moderate chloride content, requiring high strength up to 350°F. CRA 2535E is a premium, electro-slag re-melted version of alloy 2535. The performance and consistency are enhanced through tightly controlled compositional limits and microstructural cleanliness.
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825

UNS N08825
Corrosion Resistance: High
825 Datasheet


Alloy 825, UNS N08825, also referred to as 2242, is a cold hardened nickel-based alloy, intended for corrosion resistance in highly sour (H2S) environments with moderate chloride content, requiring high strength up to 350°F.
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G-3

UNS N06985
Corrosion Resistance: Severe
G-3 Datasheet


Alloy G-3, UNS N06985, is a cold hardened nickel-based alloy, intended for corrosion resistance to highly sour (H2S) environments with high chloride content, requiring high strength up to 400°F.
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G-2

UNS N06975
Corrosion Resistance: Severe
G-2 Datasheet


Alloy G-2, UNS N06975, is a cold hardened nickel-based alloy intended for corrosion resistance to highly sour (H2S) environments with high chloride content, requiring high strength up to 400°F.
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2550

UNS N06255
Corrosion Resistance: Severe – Extreme
2550 DatasheetCRA 2550E Datasheet


Alloy 2550, UNS N06255, is a cold hardened nickel-based alloy intended for corrosion resistance to highly sour (H2S) environments with high chloride content, requiring high strength up to 400°F. CRA 2550E (UNS N06255) is a premium, electro-slag re-melted version of alloy 2550. The performance and consistency are enhanced through tightly controlled compositional limits and microstructural cleanliness.
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C276

UNS N10276
Corrosion Resistance: Extreme
C276 Datasheet


C276, UNS N10276, is a cold hardened nickel-based alloy intended for the most extreme well conditions up to 450°F. In addition to its exceptional corrosion resistance under the most severe conditions, higher strengths may be achieved with C276 than other nickel alloys.
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