SE-28 (NO8028)

SECORP designation (UNS NO.)

A high performance austenitic nickel-chromium-iron alloy for service in highly corrosive conditions, especially phosphoric acid environments. High resistance to pitting, crevice corrosion, intergranular corrosion and stress corrosion cracking.

Major Applications

 

Downhole tubulars for extremely corrosive wells. Evaporator tubes in producing of phosphoric acid. Tubing and heat exchanger in sulfuric acid production. Sea-water piping and condensers. Sodium hydroxide evaporators.

NOMINAL CHEMICAL COMPOSITION (%):

Cr Ni Fe Mo Cu C Others
27.0 31.0 6.5 3.5 1.0 0.01 Mn-1.0

TYPICAL MECHANICAL PROPERTIES:

METALLURGICAL CONDITION TENSILE STRENGTH Ksi (MPa) YIELD STRENGTH 2% OFFSET Ksi (MPa) ELONGATION (%) HARDNESS
ANNEALED 85 (585) 33 (230) 40 70 RB

CORROSION RESISTANCE:

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

SPECIFICATION

SHEET/STRIP ASTM AMS BARS ASTM AMS
B709 -