What is the name of the alloy 825?What is the name of the alloy 825?
Incoloy 825 alloy
Common trade names: Incoloy 825, Alloy 825, Nickelvac 825, Nicrofer 4241.
INCOLOY Alloy 825 (UNS N08825, W.Nr. 2.4858) is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium. The nickel content is sufficient to resist chloride ion stress corrosion cracking. Nickel, along with molybdenum and copper, also has excellent resistance to reducing environments, such as those containing sulfuric and phosphoric acids. Molybdenum also helps resist pitting and crevice corrosion. The alloy's chromium content makes it resistant to many oxidizing species, such as nitric acid, nitrates and oxidizing salts. With proper heat treatment, the addition of titanium can stabilize the alloy and prevent intergranular corrosion sensitization.
Available product forms:
Pipes, tubes, plates, strips, plates, round bars, flat bars, forgings, hexagonal bars and wire rods.
Specification
INCOLOY Alloy 825 is designated UNS N08825 and Werkstoff number 2.4858. It is listed under NACE MR0175 Oil and Gas Services.
Rods, rods, wires and forgings: BS 3076NA16, ASTM B 425, ASTM B 564, ASME SB 425, ASME SB 564, ASME Code Case N-572, DIN 17752, DIN 17753, DIN 17754, VdTÜV 432, ISO 9723 , ISO 9724, ISO 9725.
Plate, sheet and strip: BS 3072NA16, BS 3073NA16, ASTM B 424, ASTM B 906, ASME SB 424, ASME SB 906, DIN 17750, VdTÜV 432, ISO 6208.
Pipes and Tubes: BS 3074NA16, 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, ASME Code Case 1936, DIN 17751, VdTÜV 432, ISO 6207.
Others: ASTM B 366, ASME SB 366, DIN 17744
chemical composition
Restricted chemical composition, weight percent
nickel................................................. .............38.0-46.0
iron................................................. .............................22.0 minutes
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.
