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OCTG 7″ 29# 25CRS-80 Plain End R3

This 7″ 29# 25CRS-80 Plain End R3 casing is manufactured from Super Duplex 25CRS, a cold-hardened duplex stainless steel engineered for high strength and corrosion resistance in sweet (CO₂) and moderately sour (H₂S) environments with high chloride content, rated up to 450°F. With a PREN ≥40, it offers superior protection against localized corrosion and pitting in the presence of chlorides and dissolved oxygen. Classified under MR0175/ISO15156 for use in environments with H₂S partial pressures up to 3.0 psi, it’s a strong choice for seawater and water injection applications in demanding well conditions.

Available Quantity

405

FT

Condition

Unused

Mill Year

Manufacturer

Salzgitter Mannesmann Stainless Tubes

Location

Texas, USA

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What is PipeFacts?

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

7

in.

Nominal ID

6.184

in

Nominal Wall Thickness

0.408

in

Drift

6.059

in

Special Drift

6.125

in

Strength

Minimum Yield Strength

80

KSI

Minimum Ultimate Tensile Strength

95

KSI

Collapse Pressure

7,030

PSI

Internal / Burst Pressure

8,160

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

25CRS

Family

Duplex Stainless

Corrosion Resistance Level

Moderate

Alloy Description

Super Duplex 25 Chrome alloys, including 25CRW and 25CRS, are cold-hardened duplex stainless steels designed for corrosion resistance in sweet (CO2) and moderately sour (H2S) environments with high chloride concentrations, providing high strength up to 450°F.

The “Super” designation signifies a Pitting Resistance Equivalent Number (PREN) of ≥40, offering enhanced protection against H2S and localized corrosion from high chloride levels and/or oxygen, compared to standard 25 Chrome. As a result, these alloys are commonly used in tubing and liners for seawater and water injection wells. However, it is important to evaluate all relevant environmental factors, including H2S, CO2, temperature, pH, and chloride concentration, before finalizing material selection.

These alloys are classified under MR0175/ISO15156 as duplex stainless steels with a Pitting Resistance Equivalent Number (PREN) ≥40, suitable for environments with H2S partial pressures up to 3.0 psi.

Elemental Composition

C
6
Carbon
0.03%
N
7
Nitrogen
0.2%‒0.3%
Si
14
Silicon
1%
P
15
Phosphorus
0.03%
S
16
Sulfur
0.01%
Cr
24
Chromium
24%‒26%
Mn
25
Manganese
1%
Fe
26
Iron
57.63%‒65.8%
Ni
28
Nickel
6%‒8%
Cu
29
Copper
0.5%‒1%
Mo
42
Molybdenum
3%‒4%
W
74
Tungsten
0.5%‒1%

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Plain End

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