Tubo in acciaio A790 DUPLEX UNS S31803


A790 DUPLEX UNS S31803 Steel Pipe

At ABTER STEEL PIPE, we offer A790 Duplex UNS S31803 steel pipes that are known for their excellent corrosion resistance, molta forza, e durata. These pipes are widely used in various industries such as oil and gas, lavorazione chimica, e applicazioni marine. Our A790 Duplex UNS S31803 steel pipes adhere to the ASTM A790 specification, ensuring their quality and performance.

Duplex UNS S31803 Pipe Specification

The specification for Duplex UNS S31803 pipe includes the following key details:

  • Standard: ASTM A790/A790M
  • Grado: Duplex UNS S31803
  • Gamma di dimensioni: NPS 1/8to NPS 48″ (DN6 to DN1200)
  • Spessore del muro: Schedule 5S to Schedule XXS
  • Lunghezza: Singolo casuale, Doppio casuale, or Customized
  • End Connections: Fine semplice, Estremità smussata, Filettato, or Coupled
  • Finitura superficiale: In salamoia, Passivated, or Polished

These specifications ensure that our Duplex UNS S31803 pipes meet the necessary requirements for seamless pipe manufacturing and are suitable for a wide range of applications.

Chemical Material Composition of Duplex UNS S31803 Pipe

The chemical composition of Duplex UNS S31803 pipe is as follows:

  • Cromo (Cr): 21.0 – 23.0%
  • Nichel (In): 4.5 – 6.5%
  • Molibdeno (Mo): 2.5 – 3.5%
  • Azoto (N): 0.08 – 0.20%
  • Manganese (Mn): 2.0% (massimo)
  • Silicio (E): 1.0% (massimo)
  • Fosforo (P): 0.03% (massimo)
  • Zolfo (S): 0.02% (massimo)
  • Carbonio (C): 0.030% (massimo)

The specific chemical composition of Duplex UNS S31803 pipe ensures its superior corrosion resistance and mechanical properties, making it suitable for demanding environments.

Mechanical Properties of Duplex UNS S31803 Seamless Pipes

The mechanical properties of Duplex UNS S31803 seamless pipes are as follows:

  • Resistenza alla trazione: 620 MPa (minimo)
  • Forza di snervamento: 450 MPa (minimo)
  • Allungamento: 25% (minimo)
  • Durezza: 290 (massimo) HB or 30 HRC (massimo)

These mechanical properties highlight the strength, duttilità, and toughness of Duplex UNS S31803 pipes, making them ideal for applications where high mechanical performance is required.

Equivalent Material of ASTM A790 Duplex UNS S31803 Seamless Pipe

The equivalent materials for ASTM A790 Duplex UNS S31803 seamless pipe include:

  • UNO/TUO: 1.4462
  • UNS: S32205
  • LUI: SUS 329J3L

These equivalent materials ensure that our Duplex UNS S31803 pipes can be easily sourced and used in various international markets.

informazioni sull'ordine

To place an order for ASTM A790 Duplex UNS S31803 seamless pipes, please provide the following information:

  • Quantity: Specify the required quantity of pipes.
  • Grandezza: Indicate the desired size of the pipes in terms of nominal pipe size (NPS) or diameter and wall thickness.
  • Lunghezza: Specify the required length of the pipes.
  • End Connections: Specify the desired end connections, such as plain end, beveled end, filettato, or coupled.
  • Finitura superficiale: Specify the desired surface finish, such as pickled, passivated, or polished.
  • Additional Requirements: If you have any specific additional requirements, please mention them.

Our team at ABTER STEEL will ensure that your order is processed promptly and that you receive high-quality ASTM A790 Duplex UNS S31803 seamless pipes that meet your specifications and expectations.

Domande frequenti (FAQ)

1. What is the difference between UNS S31803, S32750, and S32760?

The main difference lies in their chemical compositions. UNS S31803 is the most widely used grade, while UNS S32750 (2507) and UNS S32760 (Zeron 100) have higher chromium, molibdeno, e contenuto di azoto, resulting in improved corrosion resistance and strength.

2. Are duplex stainless steel pipes more expensive than other stainless steel pipes?

SÌ, duplex stainless steel pipes are generally more expensive due to their higher alloy content and superior properties. Tuttavia, their long-term durability and resistance to corrosion can result in cost savings over time.

3. Can duplex stainless steel pipes be welded?

SÌ, duplex stainless steel pipes can be welded using appropriate welding techniques. Tuttavia, it is important to ensure proper heat treatment and control to maintain the desired properties of the material.

4. How are duplex stainless steel pipes tested for quality assurance?

Duplex stainless steel pipes undergo various tests, including tension, hardening, flattening, hydrostatic, and nondestructive electric tests, to ensure compliance with the specified requirements of the ASTM A790 standard.

5. What are the advantages of using duplex stainless steel pipes?

The advantages of using duplex stainless steel pipes include excellent corrosion resistance, molta forza, buona saldabilità, e resistenza alla tensocorrosione. They are also suitable for use in challenging environments and offer cost savings in the long run.


    • Ronsun2023

      2024年3月24日 A pm12:56

      ASTM A928 UNS S31803 Mechanical Properties
      Properties Metric Imperial
      Allungamento a rottura (In 50 mm) 25.0 % 25.0 %
      Durezza, Brinell 293 293
      Durezza, Rockwell c 31.0 31.0
      Tensile strength at break 621 MPa 90000 psi

lascia un commento


Sede centrale

ABTER Steel è orgogliosa di fornire servizi 24 ore su 24 ai nostri clienti.
+ 86-317-3736333


[email protected]


Segui la nostra attività

Oltre alla nostra pipa & magazzino raccordi, Taglio, Servizi di test e supplementi, e ai servizi sopra menzionati, offriamo anche articoli di grandi dimensioni/difficili da trovare in... Flange,Raccordi,Tubo / Tubo.