Project Description
N08535 Corrosion ResistanceAlloy Pipe For Oilfield
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. 2535 offers increased resistance to the effects of H2S relative to stainless steels allowing its use as downhole tubular components, packers, and other subsurface equipment in sour wells with high-pressure and high-temperature (HPHT) conditions and Acid Gas Injection (AGI) wells. However, all environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
UNS N08535 is classified in MR0175/ISO15156 as a type 4c alloy, with no restrictions to a partial pressure of H2S below 270°F and resistant to 200 psi H2S at 350°F.
CRA 2535E (UNS N08535) 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.
ALSO KNOWN AS
- CRA 2535E
• SM2535®
• 25%Cr-35%Ni
• 25 CR35 Ni
SUITABLE APPLICATIONS
Corrosive environments containing high levels of CO2 , H2S, and chlorides
High-pressure, high-temperature (HPHT) sour wells
Acid gas injection wells
PRODUCT AVAILABILITY
FORMS: Seamless Pipe, Tubing
OD:MIN OD: 2-7/8” MAX OD: 10-3/4”
Standard & Non-Standard Sizes Available
RANGE: R1, R2, R3, Lengths up to 70′
CHEMICAL COMPOSITION
| C | Cr | Ni | Ni+Co | Fe | Mn | Si | Mo | Cu | P | S |
| ≤ 0.03 | 24 – 27 | 29 – 36.5 | ≥ 29.5 | BAL | ≤ 1 | ≤ 0.5 | 2.5 – 4 | ≤ 1.5 | ≤ 0.03 | ≤ 0.03 |
MANUFACTURING PROCESS
| PROCESS | DESCRIPTION |
| Steel Making | Made by electric furnace process followed by Vacuum Oxygen Decarburization (VOD) or Argon Oxygen Decarburization (AOD) |
| Pipe Making | Manufactured by traditional tube manufacturing processes, High strength tubulars should be furnished in cold worked condition |
| Heat Treatment | Solution Annealing Process before final cold drawing |
API 5CRA / ISO 13680 Group 3 Category 25-32-3
| Grade | Yield Strength ksi |
Tensile Strength ksi |
Elongation % |
Hardness HRC |
NACE MR0175/ISO 15156 H2S Sour Service Limits |
||
| min | max | min | min | max | |||
| 110 | 110 | 140 | 115 | 11 | 33 | Table A.14 Type 4c |
No limit ≤ 270°F, Refer to table for temperatures up to 450°F |
| 125 | 125 | 150 | 130 | 10 | 35 | ||
| 140 | 140 | 160 | 145 | 9 | 38 | 140 Grade not recommended for sour service | |
| *Non-standard mechanical properties and grades are made available upon agreement. | |||||||
TYPICAL PHYSICAL PROPERTIES
| 70°F | 200°F | 400°F | ||
| Density | lbs/in3 | 0.29 | 0.29 | 0.29 |
| Thermal Expansion | X10-6/°F | 8.3 | 8.3 | 8.4 |
| Elastic Modulus | psi x 106 | 28.3 | 27.6 | 26.3 |
| Poisson Ratio | 0.29 | 0.29 | 0.29 | |
| Thermal Conductivity | W/ft h °F | 5 | 6 | 6.4 |
| Specific Heat | Btu/lb °F | 0.09 | 0.09 | 0.09 |
We are committed to integrate steel resources in china and serve the global steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise before. In the aspect of resources and information, we have established cooperative relationship with nearly hundred enterprises, either state-owned or private owned in China.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want. We provide preffesional one-stop service to the Contractors of follows project:
- Oil and Gas Pipeline Construction
- Onshore and Offshore
- Boiler Manufacturers
- Oil Refining Equipment
- Petroleum and Chemical Plant Construction
- Fire Protection
- Heating & Air Conditioning
Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets we serve. Just give us a call +86-731-89903933.
