
Production Name : Seamless Duplex Stainless Steel Pipe Standard :
ASTM A790 Material : S31803 NACE MR0175
Duplex UNS S31803 is the most common duplex grade in the market. It
has very good resistance to localized corrosion and stress
corrosion cracking in combination with high mechanical strength. It
is widely used in oil & gas, hydro power, pressure vessels,
pulp & paper, structural components and chemical tankers. The
alloy is not intended to be used at temperatures above 300°C due to
embrittlement.
WEIGHT% | C | SI | MN | S | P | CR | NI | MO | N |
MIN. | 21,00 | 4,50 | 2,50 | 0,10 | |||||
MAX. | 0,030 | 1,00 | 2,00 | 0,015 | 0,030 | 23,00 | 6,50 | 3,50 | 0,22 |
The main applications are for details with special requirements for
high corrosion resistance.
S31803 is characterized by:
• High resistance to stress corrosion cracking in halide containing
environments.
• High resistance to pitting and crevice corrosion.
• High resistance to general corrosion.
• High mechanical strength.
• High resistance to erosion corrosion and corrosion fatigue.
YIELD STRENGTH RP0.2 MPA | TENSILE STRENGTH RM MPA | ELONGATION [%] | HARDNESS [HB] | IMPACT, CHARPY-V, -46ºC [J] | PRE | |
BAR | ≥ 450 | 650 – 880 | ≥ 25 | ≤ 270 | ≥ 45 | ≥ 33 |
PLATE, CR | ≥ 500 | 700 – 950 | ≥ 20 | ≥ 45 | ≥ 33 | |
PLATE, HR | ≥ 460 | 640 – 840 | ≥ 25 | ≥ 45 | ≥ 33 |
Solution annealing at 1020 – 1100°C followed by water quenching.
Very good.
UNS | TYPE | AMS | ASTM | FEDERAL | CHARACTERISTICS |
---|---|---|---|---|---|
S31803/S32205 | Duplex | – – | A-276 A-479 | – | Roughly double the strength of standard austenitic stainless steels, designed to improve resistance in many applications such as chloride environments and sulfide stress corrosion. |
C | MN | P | S | SI | CR | NI | MO | CU | OTHER | M/NM |
---|---|---|---|---|---|---|---|---|---|---|
.03 | 2. | .03 | .02 | 1. | 21. – 23. | 4.5 – 6.5 | 2.5 – 3.5 | N .08 – .2 | INQUIRE |
Seamless Duplex Stainless Steel Pipe Pictures
BEST PIPELINE EQUIPMENT CO.,LTD
Best Alloy Engineering Alloy Pipe as s a reference point for excellence in
the manufacture and distribution of fittings, piping, bends, forged flanges , clad products and specialties
for the upstream, midstream and downstream sectors of oil & gas, thermal and nuclear power generation.
The Company was founded in 1996 on the buttwelding fittings , forged flanges and steel pipes
with the aim of becoming a one-stop solution partner for their clients.
Best Alloy Engineering Alloy Pipe is one group company !
The company ’s business model is characterized by complete control of the supply chain, with
integrated production, stock and distribution operations. A strong market image reinforced by
genuine trust has enabled very rapid growth in all areas of the world.
It fixes assets of 8 million dollar, covers an area of 60,000 square meters.
In Best Alloy Pipe Engineering , there are more than 150 employees
with strong technical faculty in our company ,including 15 engineers, and 16 technicians.
Owning advanced flanges and tube supporting the production lines, the company has high technology skills in
forge and press, If push system, machining, cold forming, hot extrusion and heat treatment .
In addition, our factory also has the capabilities of chemical analysis, metallurgical analysis,
physical experiment, nondestructive testing and other advanced detection. Therefore, Best
Pipeline could produce different ranges of stainless steel, alloy steel, carbon steel flanges,
elbows, tees, reducers, caps, big bend, the socket series of pipeline components with high and
medium pressure, and various specifications, material steel pipe according to international and
domestic standards.
Best Alloy Pipe has a manufacturing license in
the field of
the petroleum, petrochemical, chemical, shipbuilding and other industries. The products have been widely used
in marine, power generation, natural gas, chemicals, chemical, petroleum, pharmaceutical, coal, aviation,
construction, water supply and many other fields.
In 2003, the company has provided a lot of well-known foreign trade enterprises to the domestic
OEM products, and several foreign guests of audits and visits, which makes the company win the
domestic and foreign customers trust and praise. Along with the company's expansion command,
it has obtain the right to import and export goods in 2004, developing a direct business dealings
with Germany , Poland , Belgium , the United States, Russia, Australia, Brazil, Iran, Dubai, Paraguay,
Chile, Argentina, and more than 40 other countries. Now Best Pipeline has grown into a star company
gathered production, manufacturing, domestic and foreign sales of other diversified businesses.
Best Pipeline uses high-quality products and good service to
establish a good corporation image
and good reputation, using a reasonable price to win customers’ trust and occupy the market.
The company will always insist on putting science and technology in the first and make every
effort to develop new product as customers’ requirements.
The company will always pursuit excellence along with the brilliant corporation spirit, and always
adhere to the purpose of "Quality first, Customer satisfaction", to provide customers with qualified
products and good service