OCTG 10.75″ 65.7# 25CR 125 VAM 21

Also known as 25-chromium, this Duplex Stainless 25 Chrome (25CR) is a high-strength, cold-hardened duplex stainless steel that offers exceptional resistance to localized corrosion in chloride- and oxygen-rich environments, operates reliably up to 450°F, and is qualified for use in both sweet CO₂ and moderately sour H₂S conditions, making it ideal for demanding applications like (CCUS) carbon capture, geothermal, saltwater, and water injection wells. VAM® 21TM is the latest generation of Threaded & Coupled (T&C) premium connection introducing an innovative and revolutionary design. Confidence thanks to ISO 13679 CAL-IV compliance within the full pipe body envelope extends the opportunities for your well designs. VAM® 21TM is the highest performing and most rel​iable VAM® connection to date with excellent gas tight sealing under combined loads, extreme compression resistance (100%) and innovative VAM® Effect with the VAM®​ Stabilizer™. Seal and shoulder functions are separated so that torque and compression have no affect on the sealing performance.​​

Available Quantity

462

FT

Condition

Unused

Mill Year

2019

Manufacturer

Nippon Steel

Location

Coevorden, Netherlands

Field Inspection

Completed!

Receiving Inspection

In Progress

Final Inspection

Not Started

Certified Report

Not Started

Field Inspection Complete!

In this first step of our PipeFacts™ quality assurance process, we send our field services team to inspect material in its stocked location. During the initial evaluation, we ensure that this material is suitable for acquisition and suitable for prime applications. Once the field inspection is complete, we move material to one of our regional storage and inspection hubs for further inspections.

What is

Field Inspection

?

10%
  • Traceability to MTR's
5%
  • Visual Body Inspection (VBI)
  • Visual thread Inspection (VTI)
  • Tally
  • Drift

Size

Nominal OD

10.75

in.

Nominal ID

9.56

in

Nominal Wall Thickness

0.595

in

Drift

9.404

in

Special Drift

9.5

in

Strength

Minimum Yield Strength

125

KSI

Minimum Ultimate Tensile Strength

135

KSI


Collapse Pressure

7,920

PSI

Internal / Burst Pressure

12,110

PSI

Disclaimer: The burst and collapse figures displayed are based on the API dimension tolerance of 87.5% of nominal wall thickness. Note that martensitic, duplex, super duplex, and nickel alloys often have tighter dimensional tolerances, therefore, increased strength ratings. The properties do not factor connection performance ratings. If your application requires more information ratings, please contact our technical services team, and we happily assist you.

Alloy

25CR

Family

Duplex Stainless

Corrosion Resistance Level

Moderate

Alloy Description

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

Compared to 22 Chrome, 25 Chrome offers enhanced resistance to CO2, chlorides, pH variations, and elevated temperatures. This makes it suitable for use in deeper wells with high-pressure, high-temperature (HPHT) conditions, where pitting corrosion from high chloride concentrations is a concern. It is commonly used for downhole tubular components, casing, packers, and other subsurface equipment, and is often selected for critical Class VI well projects, such as those involving Carbon Capture, Utilization, and Storage (CCUS).

This alloy is classified under NACE MR0175/ISO15156 as a duplex stainless steel with a Pitting Resistance Equivalent Number (PREN) ≤40, making it suitable for environments with H2S partial pressures up to 0.3 psi.

Elemental Composition

C
6
Carbon
0.03%
N
7
Nitrogen
0.1%‒0.3%
Si
14
Silicon
0.75%
P
15
Phosphorus
0.03%
S
16
Sulfur
0.03%
Cr
24
Chromium
24%‒26%
Mn
25
Manganese
1%
Fe
26
Iron
59.56%‒67.6%
Ni
28
Nickel
5.5%‒7.5%
Cu
29
Copper
0.2%‒0.8%
Mo
42
Molybdenum
2.5%‒3.5%
W
74
Tungsten
0.1%‒0.5%

Name

VAM 21

Licensee

VAM

Category

Premium

Thread Type

Threaded & Coupled

Description


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