Introduction

INCOLOY 825 is a nickel-iron-chromium  alloy with additions of molybdenum, copper, and titanium. The alloy’s chemical  composition, given in Table 1, is designed to provide exceptional resistance  to many corrosive environments. The nickel content is sufficient for resistance  to chloride-ion stress-corrosion cracking. The nickel, in conjunction with  the molybdenum and copper, also gives outstanding resistance to reducing environments  such as those containing sulfuric and phosphoric acids. The molybdenum also  aids resistance to pitting and crevice corrosion. The alloy’s chromium  content confers resistance to a variety of oxidizing substances such as  nitric acid, nitrates and oxidizing salt. The titanium addition serves, with  an appropriate heat treatment, to stabilize the alloy against sensitization  to intergranular corrosion.

The resistance of INCOLOY 825 to  general and localized corrosion under diverse conditions gives the alloy  broad usefulness. Applications include chemical processing, pollution  control, oil and gas recovery, acid production, pickling operations, nuclear fuel  reprocessing, and handling of radioactive wastes. Applications for alloy 825  are similar to those for INCOLOY alloy 020.

Character

l    Excellent resistance to reducing and oxidizing acids

l    Good resistance to stress-corrosion cracking

l    Satisfactory resistance to localized attack like  pitting and crevice corrosion

l    Very resistant to sulfuric and phosphoric acids

l    Good mechanical properties at both room and elevated  temperatures up to approximately 1020° F

l    Permission for pressure-vessel use at wall temperatures  up to 800°F

Application

l    Chemical Processing

l    Pollution-control

l    Oil and gas well piping

l    Nuclear fuel reprocessing

l    Components in Pickling equipment like heating coils,  tanks, baskets and chains

l    Acid production

Equal grades

NS1402(China), W.Nr. 2.4858, UNS  N08825,

Chemical  composition

Nickel  ..........................................................................38.0-46.0

Iron...............................................................................22.0  min.

Chromium....................................................................19.5-23.5

Molybdenum ...................................................................2.5-3.5

Copper  ............................................................................1.5-3.0

Titanium...........................................................................0.6-1.2

Carbon........................................................................0.05  max.

Manganese  ...................................................................1.0 max.

Sulfur  ..........................................................................0.03  max.

Silicon ...........................................................................0.5  max.

Aluminum......................................................................0.2  max.

Standards

Rod, Bar, Wire  and Forging Stock - ASTM B 425, ASTM B 564, ASME SB 425, ASME SB 564,

Plate, Sheet and  Strip – ASTM B 424,  ASTM B 906, ASME SB 424, ASME SB 906

Pipe and Tube - ASTM B 163, ASTM B 423, ASTM B 704,  ASTM B 705, ASTM B 751, ASTM B 775, ASTM B 829, ASME SB 163, ASME SB 423,  ASME SB 704, ASME SB 705, ASME SB 751, ASME SB 775, ASME SB 829

Others - ASTM B 366, ASME SB 366

Forms of products  available

Bar, rod, sheet, plate, pipe, tube,  pipe fitting, flange, fastener, powder

Stock & Delivery

Plenty of sheet/plate in stock with  US/EU/Japan origin. Huge stock of bars. Customized size will be delivered  within 2 weeks. For other products kindly confirm with A-one Alloy.