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TP 904L | UNS N08904 | TPS-Technichromo 904L

This high-alloy austenitic is very resistant to attack from diluted sulphuric acid, phosphoric acid and acetic acid. It resists pitting in neutral chloride solutions. Its resistance to stress corrosion cracking in some hot chlorides is much superior to that of the lower nickel austenite’s. This steel has good formability and weld ability. This material is present in all common standards like ASTM, DIN, BS and NFA, however with some differences. Design stresses up to 370°C are included in ASME II.

  • Heat Exchanger Tubes
  • Boiler Tubes & Pipes
  • Line Pipes
  • Hydraulic Tubes
  • Instrumentation Tubes
  • Structural Pipes
  • Mechanical Tubes & Pipes

TPS Technitube supplies TP 904L | UNS N08904 | TPS-Technichromo 904L in a big variety of forms incl.:

Chemical Composition

C = 0.02 % max S = 0.030 % max
Si = 1.00 % max Ni = 23.00-28.00 %
Mn = 2.00 % max Cr = 19.00-23.00 %
P = 0.040 % max Mo = 4.00-5.00 %
Others = Cu 1.00-2.00 %

Mechanical properties all at room temperature

Elongation in 2 in or 50 mm, (or 4D), min 40%
YS min
KSI (MPa) = 31[215]
TS min
KSI [MPa] = 71[490]
El. Min 35

 

 

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    TPS-Technitube Röhrenwerke GmbH
    Julius-Saxler-Str. 7 | 54550 Daun/Germany
    Tel.: +49 65 92 71 20 | Fax: +49 65 92 1305
    www.technistock.de | www.tpsd.de | E-Mail: service@tpsd.de