Recommended stainless pipes& tubes

Heat resisting stainless steel pipe
Heat resisting stainless pipe
The auction is for 6 metre length of prime quality grade 409 stainless steel tubing with a 1.2mm wall thickness x 38.1mm
Bright annealing tube
Bright annealing tube
Bright annealing tube under a reducing atmosphere or in a vacuum protection, after high temperature solid melting...
Stainless carbon steel composite pipe
Stainless composite pipe
The stainless carbon steel composite pipe is made of stainless steel and carbon structural steel.
Stainless steel tube for heat exchanger
Stainless heat exchanger tube
Heat exchanger tube in an extensive range of austenitic stainless steels for all types of heat exchangers.

Stainless steel pipes for oil cracking
Pipes for oil cracking
Stainless steel pipes for oil cracking inventory to fulfill your project’s needs, buy Stainless steel pipes for oil cracking at best price & fast delivery.
Seamless stainless steel pipe
Seamless stainless pipe
Stainless steel pipes is safe and reliable, environmental health, affordable, and the thin wall of the pipe as well as new and reliable

Duplex Stainless Steel Pipe

What is Duplex Stainless Steel?

Duplex Stainless Steel is a type of steel containing the high amount of chromium and minimum amount of nickel. It provides great strength and resistance to corrosive environments. It is used in desalination plants, heat exchangers, and marine processes.

Duplex 2205 (UNS S31803)

Duplex 2205 (UNS S31803), or Avesta Sheffield 2205 is a ferritic-austenitic stainless steel.

Duplex 2507 (UNS S32750)

Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed.

Super duplex UNS S32760

UNS S32760 is described as a super duplex stainless with a microstructure of 50:50 austenite and ferrite.

Dual phase steel

Dual-phase steel (DPS) is a high-strength steel that has a ferrite and martensitic microstructure.

Tech & Grade for Stainless steel

Also known as "marine grade" stainless steel due to its increased ability to resist saltwater corrosion compared to type 304. SS316 is often used for building nuclear reprocessing plants.

304/304L Stainless Steel

304 Stainless is a low carbon (0.08% max) version of basic 18-8 also known as 302.

316/316L Stainless Steel

Type 316 is more resistant to atmospheric and other mild environments than Type 304.

310S Stainless Steel

310S Stainless Steel has excellent resistance to oxidation under constant temperatures to 2000°F.

317L Stainless Steel

317L is a molybdenum bearing austenitic chromium nickel steel similar to type 316, except the alloy content in 317L is somewhat higher.

321/321H Stainless Steel

Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents.

410 Stainless Steel

Type 410 is a martensitic stainless steel which is magnetic, resists corrosion in mild environents and has fairly good ductility.

Duplex 2205 (UNS S31803)

Duplex 2205 (UNS S31803), or Avesta Sheffield 2205 is a ferritic-austenitic stainless steel.

Duplex 2507 (UNS S32750)

Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum...


UNS S32760 is described as a super duplex stainless with a microstructure of 50:50 austenite and ferrite.

Comparison table of stainless steel brands of various countries

In order to solve the cumbersome and difficult to remember stainless steel grades, improve the practicability of the brand representation, and the contrast with the international standard grades, China has formulated the "Universal Code System for Steel and Alloy Grades", such as 06Cr19Ni10, corresponding to 304. Different grades of stainless steel have different ingredients, but they all have a national standard. The standards of each country are also different.

The specific standards of each country are as follows:

NoChina,GBJapanAmericanKoreaEURIndaiAustraliaTai Wan
Austenitic stainless steel
21Cr18Mn8Ni5N12Cr18Mn9Ni5NSUS202202S20200STS2021.4373 -202
130Cr18Ni12Mo3Ti06Cr17Ni12Mo2TiSUS316Ti 316TiS31635-1.457104Cr17Ni12MoTi20316Ti 316Ti
Austenitic ferritic stainless steel (duplex stainless steel)
0Cr18Ni10Ti Iron type stainless steel
Martensitic stainless steel
353Cr1330Cr13SUS420J2--STS420J21.402830 Cr13420J2420J2

Packing stainless pipes

Capped end stainless steel tube
Capped end stainless steel tube
Tubes putted in wooden boxes
Tubes putted in wooden boxes
Stainless Steel Seamless Pipes
The wooden boxes packing for stainless products
Stainless Steel Seamless Pipes
  • Marking: SunnySteel, material grade, standard, specification, heat no.
  • Surface Treatment: Bright annealed, polished outside and inside surface.
  • Mill test certificate: according to EN 10204 3.2
  • Inspection: Third party inspection, or by clints

Pipe size range:

  • Outside diameter: range from 6mm to 530mm.
  • Wall thickness: SCH5S, SCH10S, SCH40S, SCH80S, SCH 120S
  • Legnth: unbending length or fix length
Range of Application

Stainless steel pipe (tube) has excellent characteristics of corrosion resistance and smooth finishing. Stainless steel pipe (tube) is commonly used in demanding equipment like automobiles, food processing, water treatment facilities, oil and gas processing, refinery and petrochemicals, breweries and energy industries.

The stainless steel tubing that is supplied by SunnySteel can used in a variety of industries, including:

  • Machinery Parts
  • Pharmaceutical
  • Biotechnology
  • Automotive
  • Oil and Gas
  • Marine
  • Food and Beverage Processing
  • Construction
  • Automotive industries
  • Food processing
  • Water treatment facilities
  • Breweries and energy industries

Considering the importance of outside and inside surface of stainless steel tubes for fluid power industry, Our mills are providing tubes that are free from scale, rust, seams, laps.


Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

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