SE-800/800H (NO8800/8810)

SECORP designation (UNS NO.)

A nickel-chromium-iron alloy with moderate strength and good resistance to oxidation and carbonization at elevated temperatures. The alloy does not form the embrittling sigma phase on long term exposure to 1200°F (649°C).

Major Applications

 

Tubes for steam methane reformers and ethylene pyrolusis units. Furnace tube for diphenyl, vinyl chloride monimer and acetis anhydride. Appliance heater tubing, heat treat fixtures. Standard material in nuclear and fossil-fired power plants, for steam generators and feedwater heaters.

NOMINAL CHEMICAL COMPOSITION (%):

Cr Ni Fe Mo Cu C Others
21.0 32.5 Bal - 0.50 0.08 Mn-1.0

TYPICAL MECHANICAL PROPERTIES:

METALLURGICAL CONDITION TENSILE STRENGTH Ksi (MPa) YIELD STRENGTH 2% OFFSET Ksi (MPa) ELONGATION (%) HARDNESS
SE-800 ANNEALED 70 (480) 25 (170) 45 100 RB
SE-800H ANNEALED 55 (380) 20 (140) 50 80 RB

CORROSION RESISTANCE:

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

SPECIFICATION

SHEET/STRIP ASTM AMS BARS ASTM AMS
B409 B408
5871 5766