Austenitic SS 904L Pipes and tubes

Austenitic SS 904L Pipes and tubes

Stainless Steel 904L pipes & tubes are nickel – base alloy used both for its high strength and
outstanding aqueous corrosion resistance. The strength of SS 904L tube is primarily a solid
solution effect from molybdenum and columbium.


GRADE   Cr Ni Mo Mn Si P Cu S Fe
SS 904L Min 19 23 4 1 BALANCE
Max 23 28 5 2 1 0.045 2 0.03

904L stainless steel pipe and 904L seamless pipe have an excellent weldability and are
frequently used to weld, where matching filler metals are also used to join dissimilar metals.
Stainless Steel 904L round tubes is an austenitic heat resistant alloy designed for high
temperature structural applications. Purchase 904L tube fittings and 904L pipe fittings from
904L pipe suppliers.


Stainless steel 904L Seamless Pipe   :  ASTM/ASME SB 677/ B 677
Stainless steel 904L Seamless tube   :  ASTM/ASME SA 213/A 213
Stainless steel 904L ERW Pipe          :  ASTM/ASME SB 673/ B 673
Stainless steel 904L ERW Tube         :  ASTM/ASME SB 674/ B 674


SS 904L N08904 904S13 1.4539 X1NiCrMoCuN25-20-5 2562 B 677, B 674, B 673

Production Process

Alloy 904L pipe or UNS N08904 are manufactured using processes such as ERW (Electric
Resistance Welded), Seamless and EFW (Electric Fusion Welding). SS 904L Pipe and SS 904L
Tubes have different forms such as round, square, rectangle etc. having specific end as Plain
End, Bevel End and Threaded End with nominal thickness of different schedule ranging from
SCH 5 to SCH XXS available at 904L stainless steel tube suppliers.

The process through which pipes and tubes can be manufactured include cold pilgering process,
extrusion process, tube mill process, also piercing process followed by heat treatment and
mechanical testing. You can find SS 904L seamless tubes at a stainless steel 904L seamless
tubes manufacturer in India.

Fabrication and Heat Treatment

SS 904L hot working temperature is recommended from 1562–2102°F (850–1150°C). Normally
hot working should be followed by a solution anneal and quench, but for 904L, if hot forming is
discontinued at a temperature above 2012°F (1100°C) and the material is quenched directly
thereafter, the material may be used without subsequent heat treatment which can affect the
904L pipe price. This is also part of the 904L pipe specification.

Mechanical Properties

Grade Tensile Strength Yield Strength Elongation Hardness, MAX
[MPA] [MPA] (% in 50mm) min HBW
SS 904L 490 215 35 90

Grade 904L stainless steels can be solution heat-treated at 1090 to 1175°C, followed by rapid
cooling. Alloy 904L can be easily welded and processed by standard fabrication process and
hence it is available at many 904L stainless steel pipe suppliers.


UNS N08904 pipe also known as 904L tubes falls in the austenitic stainless steel group. It has
high molybdenum and extremely low carbon content. Copper content in the alloy greatly
improves resistance to strong reducing acids, especially (H2SO4) sulphuric acid. 904L has better
resistance to chloride attack against both stress corrosion cracking and crevice / pitting
corrosion hence you can easily get it from SS 904L pipe suppliers.

Physical Properties

Grade Density (g/cm3) Elastic Modulus (GPa) Mean Co-eff of Thermal Expansion (μm/m/°C) Thermal Conductivity (W/m.K) Melting Range Specific Heat (J/Kg.K) Electrical Resistivity (μΩ.m)
20-100°C at 100°C 0-100°C at 20°C
SS 904L 7.85 190 15.3 12.9 1300-1390 450 95.2

904L pipe of stainless steels are nonmagnetic and are offering greater formability, weld ability,
and toughness. To avoid possible stress corrosion cracking in the grain boundary of Stainless
Steel 904L Pipes & Tubes , they are heated above 1000 Degree F the welded pipes & tubes may
be heated up to 1650 Degree F. 904L stainless steel pipe price varies at all 904L tube suppliers.


SS 904L Pipes and Tubes are utilized in multiple industrial needs, together with – Chemical
Industries, Oil & amp; Gas, Aerospace, organic compound, power station, Pulp & amp; Paper,
Environmental, Water comes & Engineering. Stainless steel 904L seamless tubes supplier in
India offer steel that can be used for various applications like:

  • Wiring in electrostatic precipitators
  • Oil refinery components
  • Seawater cooling devices
  • Gas scrubbing plants
  • Pulp and paper processing industries