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Inconel® Alloy 625

Common Trade Names: Inconel 625, Alloy 625, Nickel 625, Chornin 625, Altemp 625, Nickelvac 625, Haynes 625, Nicrofer® 6020.

INCONEL® nickel-chromium alloy 625 (UNS N06625/W.Nr. 2.4856) is used for its high strength, excellent fabricability (including joining), and outstanding corrosion resistance. Service temperatures range from cryogenic to 1800°F (982°C). 

Strength of INCONEL® alloy 625 is derived from the stiffening effect of molybdenum and niobium on its nickel-chromium matrix; thus precipitation-hardening treatments are not required. This combination of elements also is responsible for superior resistance to a wide range of corrosive environments of unusual severity as well as to high-temperature effects such as oxidation and carburization.

Available Product Forms: 
Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon, wire and extruded.

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Specifications

INCONEL® alloy 625 is designated as UNS N06625, Werkstoff Number 2.4856 and ISO NW6625 and is listed in NACE MR-01- 75. 

Rod, Bar, Wire and Forging Stock:  ASTM B 446; ASME SB 446 (Rod & Bar), ASTM B 564; ASME SB 564 (Forgings);  AMS 5666 (Bar, Forgings, & Rings); AMS 5837 (Wire), ISO 9723 (Rod & Bar), ISO 9724 (Wire), ISO 9725 (Forgings), VdTÜV 499 (Rod & Bar), BS 3076NA21 (Rod & Bar), EN 10095 (Rod, Bar, & Sections), DIN 17752 (Rod & Bar), ASME Code Case 1935 (Rod, Bar, & Forgings), DIN 17754 (forgings), DIN 17753 (Wire).

Plate, Sheet and Strip: - ASTM B 443; ASTM SB 443 (Plate, Sheet & Strip), AMS 5599; 5869; MAM 5599 (Plate, Sheet & Strip), ISO 6208 (Plate, Sheet & Strip), VdTÜV 499 (Plate, Sheet & Strip), BS 3072NA21 (Plate & Sheet), EN 10095 (Plate, Sheet & Strip), DIN 17750 (Plate, Sheet & Strip), ASME Code Case 1935.

Pipe & Tube: ASTM B 444; ASTM B 829; ASME SB444; ASME SB 829 (Seamless Pipe & Tube), ASTM B704; ASTM B 751; ASME SB 704; ASME SB 751 (Welded Tube), ASTM B705; ASTM B 775; ASME SB 705; ASME SB 775 (Welded Pipe), ISO 6207 (Tube), AMS 5581 (Seamless & Welded Tube), VdTÜV 499 (Tube), BS 3074NA21 (Seamless Pipe & Tube), DIN 17751 (Tube), ASME Code Case 1935.

Other Product Forms: ASTM B 366; ASME SB 366 (Fittings), ISO 4955A (Heat Resisting Steels & Alloys), DIN 17744 (Chemical composition of all product forms).

Trademark Notice: Some names are trade names and/or trademarks of specific manufacturers. American Special Metals, Corp. 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 specifications.

Inconel®  625 is a Registered Trademark of Special Metals Corporation and Its subsidiaries.

American Special Metals, Corp. makes all reasonable efforts to ensure the accuracy and correctness of the data in this document but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.

Chemical Composition

Nickel

58 min.

Chromium

20.0 - 23.0

Iron

5.0 max.

Molybdenum

8.0 - 10.0

Niobium (plus Tantalum)

3.15 - 4.15 max.

Carbon

0.010 max.

Manganese

0.50 max.

Silicon

0.50 max

Phosphorus

0.015 max.

Sulfur

0.015 max.

Aluminium

0.40 max.

Titanium

0.40 max.

Cobalt

1.0 max.

Limiting Chemical Composition, %  by Weight.

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