Alloy 904L

UNS N08904


Find High Quality Solutions with Your Nickel Alloy 904L Distributor

When a project requires quality, corrosion-resistant stainless steel, turn to the 904L grade. This low carbon content steel was designed to resist the caustic qualities of dilute sulfuric acid. When your company requires a resilient metal, trust James Duva Inc. to supply the alloy 904L tubing and pipes you need.


Fully austenitic, 904L is less reactive to sigma phases and precipitation ferrite than other conventional and high molybdenum austenitic grades. 904L combines relatively high contents of nickel molybdenum, chromium, and copper to provide more general corrosion resistance, especially in phosphoric and sulfuric conditions. As a result, this grade offers features such as:

  • A maximum service temperature of 450 ̊ C (824 ̊ F).
  • Resilience against stress corrosion cracking.
  • High resistance to crevice corrosion and pitting.
  • Easy to weld and high formability
  • More protection against intergranular corrosion.
  • Very good resistance to stress corrosion cracking.
  • A tensile strength (KSI) of 70
    A yield strength (KSI) of 25


The durability of 904L makes it useful when producing and transporting highly caustic materials. This makes it useful for chemical intensive industries or erosion resistant material. Currently, 904L’s many applications include:

  • Chemical and pharmaceutical industries
  • Use in paper and allied industries for brackish water, seawater, condensers, heat exchangers, and pipe work.
  • Gas washing
  • Production and concentration of phosphoric acid
  • Production and transport of sulfuric acid
  • Metal pickling with sulfuric acid

Expert Supply

When you order 904L and other alloys from James Duva Inc, you will receive top quality materials. Founded in 1978, our company has a reputation for delivering resilient and hard to find materials. We know our customers look for quality to keep their businesses running smoothly, so we deliver reliable materials to meet their individual company’s needs.

Look no further for the quality nickel alloy 904L pipe and tubing you need for your company.

Call 908.526.1222 today.

Typical Applications

  • Production and transport of sulfuric acid
  • Metal pickling in sulfuric acid
  • Production and concentration of phosphoric acid
  • Use in seawater, brackish water, condensers, heat exchangers and pipe work in general Paper and allied industries
  • Gas washing
  • Chemical and pharmaceutical industries

Design Features

  • Good resistance to pitting and crevice corrosion.
  • Very good resistance to stress corrosion cracking.
  • Good resistance to intergranular corrosion.
  • Good formability and weldability.
  • Maximum service temperatures of 450 ̊ C (824 ̊ F).


  • Alloy 904L Seamless Pipe 1/2″ – 6″
  • Alloy 904L Weld Pipe 4″ – 24″
  • Alloy 904L Butt-Weld Fittings 1/2″ – 24″
  • Alloy 904L Flanges 1/2″ – 24″
  • Alloy 904L Pressure Fittings 1/2″ – 2″


  • ASTM B677, B366
  • ASME SB677, SB366

Tensile Requirements

Tensile Strength (KSI) 70
Yield Strength (KSI) 25
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.

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Chemical Composition

C Cr Cu Mn Mo Ni P S Si
Max Max Max Max Max
0.02 19.0 – 23.0 1.0 – 2.0 2.0 4.0 – 5.0 23.0 – 28.0 0.045 0.035 1.0