Project Description
Super Duplex 25 Chrome Stainless Steel Pipe For Oilfield
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. This provides increased resistance to H2S and localized corrosion from high chlorides and/or oxygen relative to standard 25 Chrome. It is therefore a common choice for use as tubing and liner in seawater and water injection wells. However, all environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
These alloys are classified in MR0175/ISO15156 as duplex stainless steels having a Pitting Resistance Equivalent Number ≥40, suitable for H2S partial pressure ≤3.0 psi.
ALSO KNOWN AS
- Super Duplex 25 Chrome
• Super Duplex
• 25Cr Super Duplex
• 25CRW
• Super 25Crw
• SM25CRW®
• VM® 25S
• SAF 2507®
• Duplex 2507
• ZERON® 100
• Z100
• F55
• F53
• W.Nr. 1.4501
SUITABLE APPLICATIONS
Mildly sour environments containing the presence of high chlorides with partial pressure of H2S ≤ 3 psi As tubing and liner in seawater and water injection wells Heat exchangers, tubes, and pipes for midstream / downstream oil and gas
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
CHEMICAL COMPOSITION
| C | Cr | Ni | Fe | Mn | Si | Mo | Cu | P | S | W | N | |
| UNS S32750 | ≤ 0.03 | 24 – 26 | 6 – 8 | BAL | ≤ 1.2 | ≤ 0.8 | 3 – 4 | – | ≤ 0.035 | ≤ 0.02 | – | 0.24 – 0.32 |
| UNS S32760 | ≤ 0.03 | 24 – 26 | 6 – 8 | BAL | ≤ 1 | ≤ 1 | 3 – 4 | 0.5 – 1 | ≤ 0.03 | ≤ 0.01 | 0.5 – 1 | 0.2 – 0.3 |
| UNS S39274 | ≤ 0.03 | 24 – 26 | 6 – 8 | BAL | ≤ 1 | ≤ 0.8 | 2.5 – 3.5 | 0.2 – 0.8 | ≤ 0.03 | ≤ 0.02 | 1.5 – 2.5 | 0.24 – 0.32 |
MANUFACTURING PROCESS
| PROCESS | DESCRIPTION |
| Steel Making | Made by electric furnace process or blast furnace followed by Vacuum Oxygen Decarburization (VOD) process or Argon Oxygen Decarburization (AOD) Process |
| 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 2 Category 25-7-4
| Grade | Yield Strength ksi |
Tensile Strength ksi |
Elongation % |
Hardness HRC |
NACE MR0175/ISO 15156 H2S Sour Service Limits |
||
| min | max | min | min | max | |||
| 80 | 80 | 105 | 110 | 20 | 28 | Table A.24 (annealed) |
H2S ≤ 3.0 psi, Temp ≤ 450°F |
| 90 | 90 | 105 | 115 | 20 | 30 | ||
| 110 | 110 | 140 | 125 | 12 | 36 | Table A.24 (cold-worked) |
H2S ≤ 3.0 psi, Cl ≤ 120g/l |
| 125 | 125 | 145 | 130 | 10 | 36 | ||
| 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 | 0.28 | ||
| Thermal Expansion | X10-6/°F | 7.5 | 7.5 | 7.5 |
| Elastic Modulus | psi x 106 | 29 | 28.2 | 27 |
| Poisson Ratio | 0.24 | 0.24 | 0.24 | |
| Thermal Conductivity | Btu/ft h °F | 8 | 9 | 10 |
| Specific Heat | Btu/lb °F | 0.12 | 0.12 | 0.12 |
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.
