High Quality Duplex Steel Pipe Pickling Surface, 16SWG S31803 2205 SeamlessTube, Duplex Steel Pipe For Oil Refinery Suppliers in China

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S31803 2205 Duplex Steel Pipe For Oil Refinery

  • S31803 2205 Duplex Steel Pipe For Oil Refinery
  • S31803 2205 Duplex Steel Pipe For Oil Refinery
  • S31803 2205 Duplex Steel Pipe For Oil Refinery

S31803 2205 Duplex Steel Pipe For Oil Refinery

    Payment Type: L/C,T/T
    Terms of Trade: FOB,CFR,CIF,FCA,CPT
    Min. Order: 1 Metric Ton
    Delivery Time: 30 Days
    Packaging: plywood case packing
    Productivity: 400 Ton/month
    Brand: CNMAX
    Transportation: Ocean,Land,Air
    Place of Origin: China
    Supply Ability: 500 Ton/month
    Certificate: ISO
    HS Code: 7304419000
    Port: Shanghai,Ningbo

Basic Info

Model No.: S31803 2205 Duplex Steel Tube

Product Description

CNMAX is engaged in manufacturing and exporting a qualitative range of Super Duplex Pipes that are widely used in construction & other industries.

These super duplex pipes possess high resistance against corrosion and are available in various grades and specifications.

Our range of super duplex steel pipes are quality tested on various parameters before being delivered to clients. Offered at industry leading prices,

these are also customized as per the specific requirements of clients.

CNMAX has the most advanced producing and testing equipment . We can totally satisfy your requirement .

According to standard very strictly , duplex steel tubes which produced by us always have correct OD and WT tolerance . And they have more perfect corrosion ability .


Duplex Stainless Steel is featured with structure of two phases (α and γ) and has characteristics of both ferritic and austenitic stainless steel. It has good corrosion resistance and high strength. It is alloyed with 18%-28% Cr and 3%-10% Ni in the condition of low C. Some steels also contain the alloy elements such as Mo, Cu, Nb, Ti and N, etc. Comparing with ferritic stainless, duplex stainless steel has higher plasticity, ductility and better intergranular corrosion resistance and weldability. It keeps same 475℃ brittleness with ferritic stainless and high thermal conductivity. Duplex has improved yield strength, resistance to intergranular corrosion, stress corrosion, corrosion fatigue and abrasion & corrosion compared with austenitic stainless steel.


Alloy 2205 UNS S32305/S31803 is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness.


Alloy 2205 provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steel tube in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic.

2101 is a low nickel, lean duplex stainless steel possessing both superior strength and chloride stress-corrosion cracking resistance when compared to 300 series stainless steel.

2304 A lean austenitic-ferritic duplex stainless steel with general corrosion resistance similar to 316, but with yield strength nearly double that of austenitic stainless steel.

S31803 and S32205 are standard duplex stainless steel. A nitrogen, molybdenum enhanced austenitic-ferritic duplex stainless steel with general corrosion resistance similar to 904L, but with a yield strength nearly double that of austenitic stainless steel.

2507 (PREN 40-45), with 25-26 Cr and increased Mo and N compared with the 25Cr grades. A super austenitic-ferritic duplex stainless steel with exceptional strength and corrosion resistance ideal for chemical process, petrochemical, and seawater applications.

Duplex Stainless Steel Pipe Specifications:
ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASTM A790 (ASME SA790) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A928 (ASME SA928) Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
GB/T 21832-2008 Austenitic--Ferritic(duplex) grade stainless steel welded tubes and pipes
GB/T 21833-2008 Austenitic-Ferritic (duplex) grade stainlee steel seamless tubes and pipes

Duplex Stainless Steel Pipe Features:


1.Superior resistance to general and local corrosion, especially to stress corrosion, pitting corrosion, crevice corrosion, corrosion fatigue and abrasion & corrosion.
2.Good weldabilityduplex_stainless_steel_pipe_astm_a790_790m_s31803_2205_1_4462_uns_s32750_1_4410
3.Good mechanical properties
4.Excellent intergranular corrosion resistance
5.High cost-effectiveness, long life time

cold_rolled_duplex_stainless_steel_tube_astm_a790_a789_aneanled_pickled




Zhejiang Max Stainless Steel Co.,Ltd

 Zhejiang Max Stainless Steel Co., Ltd. is a modern stainless steel pipeline manufacturing enterprise integrating scientific research, production and sales. The company adopts advanced, efficient and mature production management mode. The company selects Walsin Lihwa and Yongxing special steel base metal as Leading materials for the production of high-quality stainless steel, to provide users around the world the most reliable and safest stainless steel pipe and pipe fittings.

CNMAX has a number of cold-drawing production lines, as well as a number of cold-rolled units, CNC lathes and machining centers, the main production seamless pipes, bright and annealing tubes, heat exchanger tubes, pipe fittings, flanges and other products. Our motto is quality first, integrity-based and we establish long-term and stable development vision with domestic and international users in various industries. Our company's products are in strict accordance with: GB, ASTM, DIN, BS, JIS, 3A, EN and other standards for production. Materials can provide: austenitic stainless steel, duplex stainless steel, super duplex steel and nickel-based Alloy Steel and other materials products widely used in automotive, petroleum, chemical, boiler, power, instrumentation, semiconductors, laboratories and other high-end fields.

CNMAX has been "quality assurance, professional services, customer satisfaction" for business purposes, pioneering, pragmatic and innovative spirit of enterprise will continue to contribute to the quality of stainless steel products to the community, complement each other and work together to create a better world.



Company Info

  • Company Name: Zhejiang Max Stainless Steel Co.,Ltd
  • Representative: Zhao rong
  • Product/Service: Stainless Steel Tubes , Nickel Alloy Pipes , Stainless steel Pipe Fittings , Forging Flanges , Stainless Steel Pipes , Duplex Steel Pipes
  • Capital (Million US $): 18,880,000 RMB
  • Year Established: 2016
  • Total Annual Sales Volume (Million US $): US$5 Million - US$10 Million
  • Export Percentage: 51% - 60%
  • Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
  • No. of Production Lines: 8
  • No. of R&D Staff: 5 -10 People
  • No. of QC Staff: 5 -10 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 1,000-3,000 square meters
  • Factory Location: Songyang
  • Contact Person: Ms. Shirley
  • Tel: 86-577-88330316
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