Seamless Pipe 1/2" W
ASTM B677, B366
ASME SB677, SB366
904L is a high-alloy austenitic stainless steel with low carbon content.
The grade is intended for use under severe corrosive conditions. It
has been application proved over many years and was originally developed
to resist corrosion in dilute sulfuric acid. It is standardized and
approved for pressure vessel use in several countries. Structurally,
904L is fully austenitic and is less sensitive to precipitation ferrite
and sigma phases than conventional austenitic grades with high molybdenum
content. Characteristically, due to the combination of relatively
high contents of chromium, nickel, molybdenum and copper 904L has
good resistance to general corrosion, particularly in sulfuric and
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 deg.C. (824 deg.F).
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
Chemical and pharmaceutical industries
Tensile Strength (KSI) 70
Yield Strength (KSI) 25
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.