Grupo Compás
■ Incoloy ■
Phone: +34 93 4351672
Fax: +34 93 5504076
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Material overview
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About Us
■ Incoloy -- material overview ■
Grupo Compás generally holds incoloy gate, globe, check, ball and butterfly valves.
As a valve stockist, we hold valves in exotic materials such as titanium, hastelloy, duplex, super duplex, monel, incoloy, inconel, alloy 20, both in stock and can also deliver against tight lead times.
Background
Incoloy alloy 825 is a nickel iron chromium alloy with additions of molybdenum, copper and titanium, with exceptional resistance to many aggressive corrosion environments.
Incoloy 825 is highly resistant to corrosion. It has a high nickel content, sufficient to resist chloride ion stress corrosion cracking, and a very stable austenite structure. The levels of molybdenum and copper enable the alloy to resist reducing agents and acids. Chromium gives resistance to oxidising conditions, such as nitric acid solutions, nitrates and oxidising salts. The alloy is titanium stabilised to resist pitting and intergranular attack after fabrication, particularly welding, which includes heating in the critical sensitisation temperature range ( 650°C – 760°C ).
Alloy 825 offers exceptional resistance to corrosion by sulphuric and phosphoric acids and is often the most cost effective alloy in sulphuric acid service.
Pressure Vessels
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.
Applications of Incoloy 825
Typical Applications of Incoloy Alloy 825 include:
• Sulphuric acid piping and vessels
• Phosphoric acid evaporators
• Pickling tank heaters, pickling tanks and equipment
• Chemical process equipment
• Propellor shafts
• Tank trucks
• Calorifiers
• Electrostatic precipitator electrodes
• Hot vessels for food, water and seawater,
• ammonium sulphate vessels
• Expansion bellows
• Marine exhaust systems
• Power station ash hoppers
Corrosion ResistanceThe 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.
Fabrication
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.
Machinability
Incoloy 825 is classed as a ‘C' alloy, and is reasonably easy to machine.
Welding
The alloy is readily weldable by the normal processes (GMAW (MIG), GTAW (TIG), SMAW (manual), SAW). The joint must be clean to avoid contamination of the weld pool.
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.
ASTM Product Specifications
B163 Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
B423 Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825 and N08221)* Seamless Pipe and Tube
B424 Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08221)* Plate, Sheet, and Strip
B425 Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825)
B704 Welded UNS N06625 and UNS N08825 Alloy Tubes
B705 Nickel-Alloy (UNS N06625 and N08825) Welded Pipe
B751 General Requirements for Nickel and Nickel Alloy Welded Tube
Equivalent Grade Designations
Other international grades that are equivalent to Incoloy Alloy 825.
USA UNS N08825
France AFNOR NC 21 FeDU
GB BS NA 16
Germany DIN NiCr21Mo
Germany Werkstoff Nr 2.4858
We generally hold the following material range: 317L/A744 GR. CG3M, 317/A744 GR. CG8M, 347/A744 GR. CF8C, Alloy 20/A744 GR. CN7M, CD4MCU/A744, Ferrallium 255, Duplex 2205 CD3MN, Monel/A494 GR. M35-1, Nickel/A494 GR. CZ100, Inconel/A494 GR. CY40-CL 1 & 2, Incoloy 800/A351 CTl 5C, Hastelloy B/A494 GR. N12MV, Hastelloy C/A494 GR. CW12MW, Hastelloy C276, Inconel 625, Titanium/B367 -69 GR. C3, Zirconium/B752 GR. 702C & 705C, Avesta 6moly 254 SMO/A351 CK3MCUN.
Actuators: we can supply pneumatic, electric and hydraulic actuators with valves when required.
For quotations or further information about our products, please contact Heather Smith (International eCommerce) by phone +34 93 435 1672 or by email: alloy-valves@alloy-valves.com
■ A182 F61, A182 F91, A182 F321, A182 F347, A182 F347H, A182 F44, Duplex A182 F51, Duplex 1.4462, Duplex 1.4470, Duplex UNS S31803, Duplex UNS S32205, Super Duplex UNS S32750, Super Duplex UNS S32760, Super Duplex 1.4501, Super Duplex 1.4410, Super Duplex 1.4507, Ferralium 255, Super Duplex A182 F53, Super Duplex A182 F55, A182 F91, 254 SMO, 6moly, 6mo, Duplex A995 Gr. 4A CD3MN, Duplex A890 Gr. 4A CD3MN, Duplex 2205, Super Duplex A890 Gr. 5A CEMN, Super Duplex A890 Gr. 6A CD3MWCUN, Alloy 20, Carpenter 20, A351 CN7M, A20 UNS 08020, Titanium A182 316Ti, Titanium Gr. 2, Titanium-Palladium Gr. 7, B367 Gr. 2, B381 Gr. II, UNS N08020, Monel 400, Monel K500, Monel A494 M35-1, Monel UNS N04400, Avesta 904L, Inconel A494-CY40, Inconel 600, Inconel 625, Inconel UNS N06600, Inconel UNS N06625, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Incoloy UNS N08800, Incoloy UNS N08825, Hastelloy C276, Hastelloy C22, Hastelloy B3, Hastelloy A494 CW12MW, A182 F5, A182 F22, A216 WC6, A216 WC9, A217 C5, A182 F11, A351 CG8M, Aluminium Bronze Valves■
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Grupo Compás. Barcelona. Spain..Tlf.: (+34) 93 435 1672...Fax: (+34) 93 550 4076.. Email: alloy-valves@alloy-valves.com
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