2507 Duplex Stainless Steel Pipe
2507 duplex stainless steel pipe is a type of super duplex stainless steel pipe. Its corrosion resistance and strength are significantly higher than those of the standard 2205 duplex steel, representing the top performance of industrial duplex stainless steel pipes.
Inquiry Now →

Product Introduction

2507 Super Duplex Stainless Steel Pipe represents the premium class of duplex stainless steels, offering exceptional corrosion resistance combined with very high mechanical strength. With a balanced microstructure of approximately 50% austenite and 50% ferrite, 2507 provides approximately double the yield strength of conventional austenitic stainless steels while delivering corrosion resistance that surpasses even 6% molybdenum austenitic grades in many aggressive environments. This super duplex grade is specifically engineered for the most demanding applications in offshore oil and gas, chemical processing, desalination, and marine environments where chloride stress corrosion cracking, pitting, and crevice corrosion pose significant challenges.

Available in seamless and welded configurations, 2507 duplex stainless steel pipe combines the highest level of corrosion resistance in the duplex family with excellent mechanical properties. Its high alloy content—25% chromium, 7% nickel, 4% molybdenum, and 0.3% nitrogen—provides a Pitting Resistance Equivalent Number (PREN) of 42-45, making it suitable for seawater, chlorinated water, and aggressive chemical environments that would rapidly degrade lower-alloy materials. The balanced microstructure ensures natural resistance to stress corrosion cracking while maintaining good toughness and weldability with proper procedures.

Product parameters


Item / Parameter

Specification for 2507 Pipe

Notes / Significance

Key Feature

The Super Duplex Premium Corrosion-Resistant Piping Solution. Highest corrosion resistance in duplex family with PREN 42-45, combined with very high strength (~550 MPa yield strength).

The premium choice for extremely aggressive environments requiring maximum corrosion resistance and high strength.

Common Designations

UNS S32750
ASTM A790/A928 (Duplex Pipe)
EN 1.4410, X2CrNiMoN25-7-4
SAF 2507®
F53 (Wrought product designation)

Super duplex grade with strictly controlled chemistry for optimal performance.

Chemical Composition (Typical wt.%)

C: ≤ 0.030
Cr: 24.0 - 26.0Ni: 6.0 - 8.0Mo: 3.0 - 5.0N: 0.24 - 0.32Mn: ≤ 1.20
Si: ≤ 0.80

High nitrogen content (0.24-0.32%) is critical for strength and phase balance.

Mechanical Properties

Tensile Strength: ≥ 800 MPa
Yield Strength: ≥ 550 MPa
Elongation: ≥ 15%
Hardness: ≤ 310 HB
Impact Toughness: ≥ 45 J at -46°C

Exceptionally high strength allows significant weight reduction in piping systems.

Physical Properties

Density: 7.80 g/cm³
Melting Range: 1400 - 1450 °C
Thermal Expansion: 13.0 × 10⁻⁶/K (20-100°C)
Thermal Conductivity: 17 W/m·K
Magnetic (due to ferrite phase)

Lower thermal expansion reduces thermal stress in piping systems.

Corrosion Resistance

Exceptional: PREN*: 42-45
Superior resistance to: chloride stress corrosion cracking, pitting, crevice corrosion, erosion-corrosion, seawater corrosion.

Performance exceeds 6% Mo austenitic stainless steels in many aggressive environments.

Pressure Ratings

Schedule 10S/40S: Standard
Schedule 80S/160: Heavy wall
ASME B31.3 compliant
Highest allowable stresses among stainless steels

Significant wall thickness reduction possible due to high strength.

Temperature Limits

Continuous Service: Up to 300°C
Maximum Service: 315°C
Minimum Service: -50°C
Critical Range: 300-1000°C (embrittlement)

Similar temperature limitations to other duplex grades.

Welding Characteristics

Strict procedure control required
Overmatched filler metals essential (higher alloy)
Heat input control: 0.5-1.5 kJ/mm
Interpass temperature: ≤ 100°C
Shielding gas: Ar + 2% N₂ recommended

Demanding but well-established welding procedures exist.

Key Standards

ASTM A790: Seamless & Welded Duplex Pipe
ASTM A928: EFW Duplex Pipe
ASTM A789: Seamless & Welded Tubing
NORSOK M-630: Offshore materials
DNV OS F101: Submarine pipeline systems

Stringent quality requirements for critical applications.

Common Applications

• Offshore Oil & Gas: Subsea flowlines, risers, process piping, seawater injection
• Desalination Plants: Seawater intake, brine handling, high-pressure RO systems
• Chemical Processing: Highly corrosive chemical transport, acid piping
• Marine Engineering: Seawater cooling systems, ballast piping, marine exhaust
• Pulp & Paper: Extremely corrosive bleach plant environments
• Power Generation: Flue gas desulfurization, advanced cooling systems
• Mining: Highly aggressive slurry and process water systems

Reserved for the most demanding corrosive environments requiring maximum reliability.

Surface selection

0f162d0b-14e0-4984-b1ee-93d5d226fd78

Packaging and transportation

Product storage
Product packaging
Product transportation
  • 07a3e9ebd5226dff67db1ced7546a45e
  • e74298b358dba458433d1c5fca8556de
  • 7cf0f7b087df557f3d87356c7ff41a57
  • 9d1230e4f96d347fd470d730e9a5c7da
  • dbe5116e9adaeea4a971c526e41c17d3
  • a64f2b412e20ebf1ab5e387efee53da7
  • 3eb933541131f528d6098c25db22a6c3
  • 5c3036399c17cd5f7a2d925750d3e388
  • cb1eb78caa26614f5926c5e30a90bb9b
  • d8a0dfc79fea23e534cbc5b682f55f87
  • e513556981a9068dff6de09f6acfbaae
  • 9378ecc25f6cdde6614141200b25f493
  • 8bf352734dd6e6dad394ac0dbb80ff1a
  • 74e55ea40f3a78f51c779d39445b07eb
  • 微信图片_20250805172913_195_9
  • b484aba3fb997f99cc4cb6a13b33ee49
  • 0222_clear
  • d538a4ae1c6a142968cd8bafc650ce19

FACTORY SHOW

  • c1146c2bcfc859f4699fe0e085b93a9d1f42462f4bfec-Wgf42E
  • f4c45c2d6c5478927b0cf6620f64a1afe6697ba91d2b17-8li2Fb
  • 2a47e8efdd7cfa3e01584ecc0812764219aa360a39f1c-tSY0Yd

FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

INQUIRY

To learn more about this product, you can submit your requirements here

SUBMIT MESSAGE

RELATED PRODUCTS