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2507 1.4410 S31260 Duplex Stainless Steel Pipe For Oilfield

1.4410 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.

25 Chrome offers increased resistance to the effects of CO2 , chlorides, pH, and temperatures relative to 22 Chrome allowing use as downhole tubular components, packers, and other subsurface equipment in deeper wells with high-pressure and high-temperature (HPHT) conditions where pitting corrosion from high chlorides are a concern.

This alloy is classified in MR0175/ISO15156 as a duplex stainless steel having a Pitting Resistance Equivalent Number ≤40, suitable for H2S partial pressure ≤0.3 psi.

ALSO KNOWN AS

  • 25 Chrome Duplex
    • 25Cr
    • SM25CR®
    • VM® 25
    • 2507
    • Duplex 2507
  • 1.4410

SUITABLE APPLICATIONS

Corrosive environments containing the presence of CO2 , low H2S, and chlorides High-pressure, high-temperature (HPHT), sweet (CO2) environments where localized corrosion is a concern (high temperature, high chlorides, and low pH)

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
≤ 0.03 24 – 26 5.5 – 7.5 BAL ≤ 1 ≤ 0.75 2.5 – 3.5 0.2 – 0.8 ≤ 0.03 ≤ 0.03 0.1 – 0.5 0.1 – 0.3

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 25-7-3

Grade Yield
Strength
ksi		 Tensile
Strength
ksi		 Elongation
%		 Hardness
HRC		 NACE MR0175/ISO 15156
H2S Sour Service Limits
min max min min max
65 65 90 90 25 26 Table A.24
(annealed)		 H2S ≤ 3.0 psi,
Temp ≤ 450°F
75 75 100 90 25 26
110 110 140 125 11 36 Table A.25
(cold-worked)		 H2S ≤ 3.0 psi
125 125 150 130 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 7.5 8
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

Intergranural Corrosion
2507’s low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment; therefore, the alloy is highly resistant to carbide-related intergranular corrosion.

Stress Corrosion Cracking
The duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC). Because of its higher alloy content, 2507 is superior to 2205 in corrosion resistance and strength. 2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels or where brine has been injected to enhance recovery.

Pitting Corrosion
Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions. The data above were measured by an electrochemical technique based on ASTM G 61. The critical pitting temperatures (CPT) of several high-performance steels in a 1M sodium chloride solution were determined. The results illustrate the excellent resistance of 2507 to pitting corrosion. The normal data spread for each grade is indicated by the dark gray portion of the bar.

Crevice Corrosion
The presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.

Experienced 15+ Years

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 Can Supply Follows Products with High Quality:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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