904L Stainless Steel Tube Pipe
904L Stainless Steel Tube Pipe
904L Stainless Steel Tube Pipe
904L Stainless Steel Tube Pipe

904L Stainless Steel Tube Pipe

UNS NO8904, commonly known as 904L, is a low carbon high alloy austenitic stainless steel which is widely used in applications where the corrosion properties of AISI 316L and AISI 317L are not adequate.


The addition of copper to this grade gives it corrosion resistant properties superior to the conventional chrome nickel stainless steels, in particular to sulphuric, phosphoric and acetic acids. However, there is limited use with hydrochloric acids. It also has a high resistance to pitting in chloride solutions, a high resistance to both crevice and stress corrosion cracking. Alloy 904L performs better than other austenitic stainless steels due to the higher alloying of nickel and molybdenum.


The grade is non-magnetic in all conditions and has excellent formability and weldability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures.


The high chromium content promotes and maintains a passive film which protects the material in many corrosive environments.904L has a greater resistance to precipitation of ferrite and sigma phases on cooling and welding than other stainless steels containing molybdenum such as 316L and 317L. There is no risk of intercrystalline corrosion on cooling or welding due to the low carbon content. Its maximum service temperature is at 450°C.


This grade is particularly useful in control and instrumentation tubing applications where 316 and 317L are not suitable.


Chemical Composition (% by weight)

ElementMinMax
C-0.02
Mn-2
Ni2328
Cr1923
S-0.3
Mo45
N-0.1
Cu12
P-0.03
Si-0.7


Typical Applications

Seawater cooling equipment

Chemical processing for sulphuric, phosphoric and acetic acids

Gas washing

Condenser tubes

Control and instrumentation

Heat exchangers


Properties of 904L stainless Steel:

904L Super austenitic stainless steel of low carbon and high nickel, molybdenum austenitic stainless and acid-resistant steel, for the introduction of France h · S the company's proprietary material.

A good change activation-deactivation capabilities, excellent corrosion resistance, non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, phosphoric acid and has good corrosion resistance, in the neutral medium containing chloride ions has a good resistance to pitting, has a good resistance to crevice corrosion and stress corrosion performance.

Applies to 70 ℃ the following kinds of concentrated sulfuric acid at atmospheric pressure under any concentration, temperature of acetic acid and formic acid and acetic acid corrosion resistance is also very good.

904L stainless steel

Standard

Grade

Chemical Composition %

Temper

Yied strength/Mpa

Tensile strength/Mpa

Elongation %

Hardness

GB

0Cr20Ni25SiMn4.5Cu

C≤0.02,Mn≤2.00,Si≤1.00,P≤0.045,S≤0.035,Cr 19.0~23.0,Ni 23~28,Mo 4~5,Ni 23~28,Cu 1.0~2.0

Annealed,hot rolled/cold rolled

≥220

≥490

≥36

HV≤150

USA

N08904

JIS

/

German

1.4539

* Petroleum and petrochemical equipment, petrochemical equipment in the reactor.

* Sulfuric acid storage and transportation equipment, such as heat ex-changers, and so on.

* Power plant flue gas desulfurization equipment, mainly using parts: absorber Tower, flue, stall doors, trim, sprinkler systems, etc.

* Organic acid scrubber and the fans in the system.

* Sea-water treatment plant, seawater heat ex-changers Equipment for the paper industry, sulfuric acid and nitric acid equipment, pharmaceutical industry of sulfuric acid and other chemical equipment, pressure vessels, food equipment.

* Pharmaceutical factory: centrifuge, reactor, and so on.

* Plant foods: soy sauce pots, cooking wine, salt shakers, equipment and dressing.

Package Information:JQ Metal are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might otherwise be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

  • What are your advantages?

    1) Fast delivery time.
    2) High quality, quantity is with preferential treatment.
    3) We can process to different finish you request.
    4) Main distributor and gold supplier.
    5) 800 Tons/Month, high production capability will short your wait time.
    6) Tisco, Jisco,Baoxin, Baosteel and other famous brand.
    7) Good quality with reasonable price.
    8) Buyer's Specification Accepted.
    9) Experienced R & D Department.

    1
  • How can I get some samples?

    We are honored to offer you samples ( A4 paper size will be free)

    2
  • What is your export package?

    Interleave paper, Waterproof paper,metal belt pack the sheet, wooden pallet.

    3
  • What is your delivery time?

    Normally 7 day after deposit received or L/C at sight.

    4

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