Womic Stainless Steel Co., Ltd
2507 super duplex stainless steel pipe is a high alloy duplex stainless steel pipe specifically engineered for extremely corrosive environments and high strength industrial applications. Super duplex stainless steels contain higher chromium, molybdenum, and nitrogen content compared with standard duplex grades such as 2205, which significantly improves corrosion resistance and mechanical strength.
The microstructure of 2507 super duplex stainless steel consists of an optimized balance of ferrite and austenite phases, providing a unique combination of excellent corrosion resistance and high structural strength. This material is particularly suitable for offshore oil and gas production systems, subsea pipelines, desalination plants, and chemical processing facilities where materials must withstand severe corrosion conditions.
Due to its superior resistance to chloride pitting, crevice corrosion, and stress corrosion cracking, 2507 super duplex stainless steel pipe is widely used in marine and energy industries. In many applications, this material can provide longer service life and lower maintenance costs compared with conventional stainless steels.
Key characteristics of 2507 super duplex stainless steel pipe include:
1 extremely high resistance to chloride pitting corrosion
2 excellent resistance to crevice corrosion in seawater
3 superior resistance to chloride stress corrosion cracking
4 very high mechanical strength compared with austenitic stainless steels
5 outstanding performance in offshore and subsea engineering
As an experienced duplex stainless steel pipe supplier, Womic Steel manufactures high quality 2507 super duplex stainless steel pipes for global offshore engineering projects.
2507 super duplex stainless steel pipes are produced in accordance with internationally recognized standards that specify chemical composition limits, heat treatment conditions, dimensional tolerances, and inspection procedures. Compliance with these standards ensures that the material performs reliably in critical industrial environments such as offshore platforms and chemical plants.
Common manufacturing standards include:
1 ASTM A790
2 ASTM A789
3 ASTM A928
4 EN 10216-5
5 EN 10217-7
These standards ensure compatibility with international pressure piping codes and offshore engineering requirements.
2507 super duplex stainless steel pipe corresponds to several international material designations. These grades are used across global engineering standards and industrial specifications.
|
Standard |
Grade |
|
ASTM |
TP2507 |
|
UNS |
S32750 |
|
EN |
1.4410 |
|
JIS |
SUS32750 |
These equivalent designations ensure material compatibility for international offshore projects and energy infrastructure.
The chemical composition of 2507 super duplex stainless steel is optimized to provide superior corrosion resistance and maintain the balanced duplex microstructure.
Typical chemical composition:
|
Element |
Content (%) |
|
Carbon |
≤0.03 |
|
Silicon |
≤0.80 |
|
Manganese |
≤1.20 |
|
Chromium |
24.0 – 26.0 |
|
Nickel |
6.0 – 8.0 |
|
Molybdenum |
3.0 – 5.0 |
|
Nitrogen |
0.24 – 0.32 |
Key metallurgical benefits include:
1 high chromium improving resistance to oxidizing
environments
2 molybdenum enhancing resistance to pitting corrosion
3 nitrogen increasing mechanical strength
4 optimized ferrite-austenite phase balance
These alloying elements provide exceptional corrosion protection in seawater and chemical processing environments.
2507 super duplex stainless steel pipe offers significantly higher strength compared with traditional stainless steels. This high strength allows designers to reduce wall thickness while maintaining the same pressure capacity, which can reduce overall system weight and material costs.
Typical mechanical properties include:
|
Property |
Value |
|
Tensile Strength |
≥800 MPa |
|
Yield Strength |
≥550 MPa |
|
Elongation |
≥15% |
|
Hardness |
≤310 HBW |
Mechanical advantages include:
1 very high yield strength for pressure piping systems
2 strong resistance to mechanical deformation
3 excellent structural stability under high loads
4 good impact toughness for industrial applications
One of the most significant advantages of 2507 super duplex stainless steel pipe is its outstanding corrosion resistance in aggressive environments. The high chromium and molybdenum content combined with nitrogen provides superior protection against localized corrosion.
Important corrosion resistance characteristics include:
1 excellent resistance to chloride pitting corrosion
2 strong resistance to crevice corrosion in seawater
3 superior resistance to stress corrosion cracking
4 excellent performance in acidic environments
5 outstanding durability in marine and offshore conditions
Because of these properties, 2507 super duplex stainless steel is often selected for critical offshore equipment and subsea pipelines.
2507 super duplex stainless steel pipes are manufactured using advanced production technologies that ensure strict control of chemical composition, microstructure, and dimensional accuracy.
Typical seamless pipe production steps include:
1 super duplex stainless steel billet inspection
2 billet heating under controlled temperature conditions
3 rotary piercing to form hollow tube shells
4 hot rolling or extrusion process
5 cold drawing or cold rolling for dimensional precision
6 solution annealing heat treatment
7 straightening and cutting
8 final inspection and testing
Large diameter super duplex pipes are typically produced through welded manufacturing processes.
Typical production procedures include:
1 duplex stainless steel plate or coil preparation
2 roll forming into cylindrical pipe shapes
3 automatic welding such as TIG or SAW
4 weld seam heat treatment
5 pickling and passivation
6 dimensional calibration
7 nondestructive testing
Womic Steel applies strict quality control procedures to guarantee consistent performance of super duplex stainless steel pipes.
2507 super duplex stainless steel pipes are manufactured in a wide range of dimensions to meet the requirements of offshore engineering projects and industrial piping systems.
Typical production capability includes:
|
Pipe Type |
OD Range |
|
Seamless Pipe |
6 mm – 610 mm |
|
Welded Pipe |
15 mm – 2200 mm |
Additional manufacturing services include:
1 customized pipe length production
2 large diameter pipe fabrication
3 project specific dimensional customization
2507 super duplex stainless steel pipes are available in various ASME pipe schedule classifications to meet pressure and structural requirements.
Common pipe schedules include:
1 SCH 5
2 SCH 10
3 SCH 20
4 SCH 40
5 SCH 80
6 SCH 160
Because of the high strength of super duplex stainless steel, engineers often use thinner walls while maintaining equivalent pressure ratings.
Proper surface finishing improves corrosion resistance and ensures clean surface conditions for stainless steel pipes used in industrial environments.
Common surface finishes include:
1 pickled and passivated surface
2 bright annealed finish
3 industrial sand blasted surface
4 mechanical polished surface
These finishing treatments improve corrosion resistance and product appearance.
Strict inspection procedures are implemented throughout the production process to ensure that super duplex stainless steel pipes meet international engineering standards.
Typical inspection procedures include:
1 chemical composition analysis
2 mechanical property testing
3 hydrostatic pressure testing
4 ultrasonic testing
5 eddy current inspection
6 ferrite content measurement
7 PMI positive material identification
Womic Steel provides mill test certificates and third party inspection reports for project verification.
507 super duplex stainless steel pipes are widely used in industries requiring extremely high corrosion resistance and mechanical strength.
Typical applications include:
1 offshore oil and gas platforms
2 subsea pipeline systems
3 seawater desalination plants
4 chemical processing equipment
5 marine engineering structures
6 high pressure heat exchanger systems
7 refinery processing units
These demanding applications require materials capable of maintaining long-term structural integrity in extremely corrosive environments.
As a global supplier of stainless steel piping products, Womic Steel offers comprehensive manufacturing and supply capabilities.
Key advantages include:
1 Advanced stainless steel pipe production equipment
2 Strict quality inspection and testing systems
3 Wide range of pipe sizes and grades
4 Competitive pricing for international projects
5 Reliable delivery schedules and logistics support
With extensive experience supplying stainless steel pipes to international engineering projects, Womic Steel provides reliable piping solutions for customers worldwide.
Customized services. Rapid production. Global reach. We ensure your specific needs are fulfilled with precision and top-tier quality.
Website: www.womicstainless.com
Email:info@womicstainless.com
Tel/WhatsApp/WeChat:Victor: +86-15575100681 or Jack: +86-18390957568
