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.
Specifications
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).
Chemical Composition
| Nickel | 58 min. |
| Cromium | 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. |
| Cobalta | 1.0 max. |
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