SE-904L/904MO (NO8904/8925)

SECORP designation (UNS NO.)

Specially alloyed and molybdenum enriched to combat against phosphoric and sulphuric acid. High performance to pitting and crevice corrosion at elevated temperatures.

Major Applications

 

Offshore pipe-lines and platforms. Pulp and paper industry. Areas where 300 series stainless steels fail in chloride stress corrosion.

NOMINAL CHEMICAL COMPOSITION (%):

Cr Ni Fe Mo Cu C Others
22.0 25.0 Bal 6.5 1.0 0.02 Mn-2.0
Si-1.0

TYPICAL MECHANICAL PROPERTIES:

METALLURGICAL CONDITION TENSILE STRENGTH Ksi (MPa) YIELD STRENGTH 2% OFFSET Ksi (MPa) ELONGATION (%) HARDNESS
ANNEALED 37 (255) 29 (200) 42 83 RB

CORROSION RESISTANCE:

H2SO4 HIC H3PO4 HNO3 ORGANIC ACIDS ALKALINES SEA WATER CHLORIDE CRACKING
G G G G G G G A

SPECIFICATION

SHEET/STRIP ASTM AMS BARS ASTM AMS
B625 -
- -