INCOLOY825 Seamless Tubes_brass plate,steel pipe suppliers

INCOLOY825 Seamless Tubes

Inconel 825 ASTM B423/ ASME B423 Tubes (UNS N08825)

Manufacturer, Suppliers and Exporter’s in ASME / ASTM B423 Incoloy 825 Seamless Tubes

UNS No: UNS N08825
Werkstoff Nr: 2.4858

The above names are trade names and/or trademarks of specific manufactures including Special Metal Corporation. Prosaic Steel & Alloy is not affiliated with any manufacturer(s). Orders will be filled to meet specifications from any available source(s). Names are listed solely for reference to help identify products consistent with listed specificationsto help identify products consistent with listed specifications. Specifications – Incoloy 825 Tubes- UNS N08825

Product Range – Seamless Tubes6 mm OD x 0.7 mm to 50.8 mm OD x 3 mm thk.
Specifications – B 163 / B 423

Finish Conditions– Cold Drawn Solution Annealed & Pickled / Cold Drawn Bright annealed / NACE MRO 175

Incoloy alloy 825 is a nickel-iron-chromium alloy with additions of copper, molybdenum and titanium. The alloy’s chemical composition 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 nitrates, nitric acid and oxidizing salts. 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.

The outstanding property of Incoloy 825 is its corrosion resistance. In reducing & oxidising conditions, Incoloy 825 resists general corrosion, pitting & crevice corrosion, intergranular corrosion and stress corrosion cracking. It is particularly useful in sulphuric & phosphoric acids, sulphur containing flue gases, sour gas and oil wells and sea water.

Incoloy 825 is approved for pressure vessel operating temperatures up to 525°C (AS1210, AS4041), 538°C (ASME Boiler & Pressure Vessel Code, Sections I, III, VIII, IX, Cases 1936, N-188). Brittle phases may form in alloy 825 at temperatures above ~ 540°C, so it is not normally used at these temperatures, where creep-rupture properties would be design factors.

Chemical Composition of Incoloy Alloy 825
Table 1. Chemical composition of Incoloy Alloy 825 (ASTM B163 – Heat exchanger tube)

Element % Element %
Nickel 38.0 – 46.0 Carbon 0.05 max
Chromium 19.5 – 23.5 Manganese 1.0 max
Molybdenum 2.5 – 3.5 Sulfur 0.03 max
Copper 1.5 – 3.0 Silicon 0.5 max
Titanium 0.6 – 1.2 Aluminium 0.2 max
Iron 22.0 min (~33%)    

Tensile Properties of Incoloy Alloy 825
Table 2. Typical room temperature tensile properties (not for design. Consult the relevant material or product specification for design values)

Form   Condition   0.2% Proof Stress
MPa
  Tensile Strength
MPa
  Elong
%
Tube   Annealed   440   770   35
Tube   Cold drawn   880   1000   15

Corrosion Resistance
The outstanding property of Incoloy 825 is its corrosion resistance. In reducing & oxidising conditions, Incoloy 825 resists general corrosion, pitting & crevice corrosion, intergranular corrosion and stress corrosion cracking. It is particularly useful in sulphuric & phosphoric acids, sulphur containing flue gases, sour gas and oil wells and sea water.

Incoloy 825 can be readily hot or cold worked. Hot working should be in the range 870 – 1180°C, finishing at 870 – 980°C. For maximum corrosion resistance hot worked parts should be stabilise annealed before use. The alloy is easier to cold form than stainless steels.

Heat Treatment
Incoloy 825 is stabilise annealed at 940°C. The softest structure is obtained at 980°C. Sections heavier than sheet, strip and wire should be quenched to avoid sensitisation.

Application
Incoloy 825 is the material of choice in a wide variety of applications up to a temperature of approximately 550°C (1020°F),

  • Chemical Processing
  • Nuclear Fuel Reprocessing
  • Acid Production
  • Pickling Equipment

Source: Austral Wright Metals

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