Your Professional S31803 Stainless Steel Pipe Supplier

 

ALLOK (Jiaxing) Metal Materials Co.,Ltd. was built in 2018, it owns two production bases in Jiaxing city and Yancheng city, equipped with precision cold rolling machines, cold drawing machines, bright annealing furnace, ultrasonic cleaning tank, passivation tanks, multi-line electropolishing devices, ultrapure water preparation machine, dryer, clean room, eddy current testing detector, ultrasonic flaw detector and other equipment, focusing on the production of stainless steel tubes, stainless steel pipes and nickel alloy tubes. for non-standard products that need to be customized, we have the ability to sample and mass produce for customers in a relatively short period of time.

 
 
Why Choose Us

Rich Products

Our company can produce stainless steel tubes, nickel alloy tubes, electrolytic polished tubes, bright annealed tubes, stainless steel coils, stainless steel capillary tubes, alloy tubes, etc.

Products Widely Used

The products produced by our company can be widely used in the biopharmaceutical industry, fine chemical industry, semiconductor industry, instrumentation industry, gas engineering industry and aerospace industry.

Advanced Production Equipment

Our company has advanced production equipment, such as precision cold rolling mills, cold drawing machines, bright annealing furnaces, ultrasonic cleaning tanks, passivation tanks, multi-line electrolytic polishing devices, etc.

 

Quality Guaranteed

All products we produce have ISO9001:2015 certificates, and all products are strictly tested in accordance with industry standards and contract agreements before leaving the factory. MTC is provided, and third-party testing certificates can be provided when necessary.

 

Advantages of S31803 Stainless Steel Pipe
 

Anti-Corrosive Properties

Since its anti-corrosive abilities are typically what it’s touted for, we need to discuss them in detail. Often used in sea water, S31803 stainless steel thrives when it comes to resisting corrosion from chloride.

Strength

Though it’s not the absolute strongest stainless steel on the market, S31803 is still very strong. Not only can it withstand a great deal of consistent pressure over prolonged periods of time, it can withstand physical trauma as well.

Affordability

S31803 can be sold for less money than other anti-corrosive stainless steels because it contains less nickel. Because nickel is costly to mine, it typically amps up the price of steels which contain it.

Water-friendly

As we mentioned above, S31803 stainless steel has top-tier anti-corrosive abilities. These abilities allow it to thrive in settings where water is ever-present.

 

Technical Specifications of S31803 Stainless Steel Pipe

 

Chemical Composition (ASTM A790/A928)

Element

Cr

Ni

Mo

N

C

Mn

Si

P

S

Fe

% Range

21-23

4.5-6.5

2.5-3.5

0.08-0.20

≤0.03

≤2.0

≤1.0

≤0.03

≤0.02

Balance

 

Mechanical Properties

Property

Value

Tensile Strength

≥620 MPa

Yield Strength

≥450 MPa

Elongation

≥25%

Hardness (Brinell)

≤290 HB

 

 

Manufacturing & Quality Assurance

Available Forms: Seamless & welded (ERW, SAW, LSAW)


Sizes Range: 1/2″ to 48″ (DN15 to DN1200)


Standards Compliance: ASTM A790, ASME SA790, NACE MR0175


Testing: Hydrostatic, PMI, ultrasonic, eddy current, intergranular corrosion test


Surface Finish: Pickled, polished, or as required

S31803 Pipe

 

Components of S31803 Stainless Steel Pipe

 

 

S31803 stainless steel is made out of two different types of steel: austenitic steel and ferritic steel. By combining these steels, S31803 is capable of serving a number of different purposes at a reasonable price.

Austenitic
Dense in nickel and chromium, austenitic steel is an expensive steel known primarily for its anti-corrosive properties. It withstands not only high levels of heat, but saltwater as well.

Ferritic
Whereas austenitic steel is known for its anti-corrosive characteristics, ferritic steel is known for its strength and structural characteristics. High in chromium, it also contains titanium, aluminum, and a variety of other metals.

 

Applications of S31803 Stainless Steel Pipe

 

Oil & Gas Industry

Offshore platforms, subsea pipelines, risers

01

Chemical Processing

Acid storage, heat exchangers, reactors

02

Desalination Plants

Seawater intake and outfall systems

03

Power Generation

Flue gas desulfurization (FGD) systems

04

Marine Engineering

Shipbuilding, ballast systems, propeller shafts

05

 

 

FAQ

 

Q: What is the difference between uns S31803 and ss316l?

A: Compared with SS316, UNS S31803 will have around twice the yield strength. The Pitting Resistance Equivalent Number (PREN) of UNS31803 is close to 34, whereas it is 25 for SS316, meaning that its resistance to pitting corrosion is proportionally less.

Q: What are the different types of stainless steel pipes?

A: There are three main Stainless Steel grades – 304, 316, and 317. Each grade has its own unique properties which make them ideal for different applications. When choosing SS pipes, it's important to consider the application as each grade has unique properties that make them suitable for different uses.

Q: Is S31803 a duplex or super duplex?

A: UNS S31803/2205 is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades.

Q: What is S31803 pipe material?

A: Duplex Steel S31803 pipes have ferritic and austenitic alloy properties, which are above the usual stainless steel pipes like 316 and 316L in terms of overall performance and these are enhanced in terms of resistance to various corrosions.

Q: What is the difference between S31803 and 2205 stainless steel?

A: The most noticeable disparity between the two UNS numbers is that S32205 contains a higher nitrogen content which gives an extra shield of safety to an already solid surface.

We're well-known as one of the leading s31803 stainless steel pipe manufacturers and suppliers in China. Please feel free to wholesale custom made s31803 stainless steel pipe at competitive price from our factory.

1 Inch Stainless Steel Tubing Coil, S31803 Stainless Steel Pipe