Nickel Alloy Seamless Tube ASTM B 163 ASM B 423 Incoloy 825 N08825,2.4858 Heat Exchanger Application

Nickel Alloy Seamless Tube ASTM B 163 ASM B 423 Incoloy 825 N08825,2.4858 Heat Exchanger Application

YUHONG GROUP deal with stainless steel seamless pipe and tube already more than 32 years, every year sell more than 80000 tons of stainless steel seamless pipe and tube. Our client already cover more than 65 countries. Our stainless steel seamless pipe and tube was width used in Mining, Energy, Petrochemical, Chemical Industry, Food plant, Paper plant, Gas and Fluid Industry etc. ANSI B16.10: B16.19 SCH 5S, SCH 10S, SCH 20, SCH 30, SCH 40S, SCH 60, SCH80S, XS, SCH 100, SCH 120, SCH160, XXS

Nickel Alloy Tube Incoloy 825
Nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. 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 nitric acid, nitrates and
oxidizing salt. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against
sensitization to intergranular corrosion.


INCOLOY Alloy 825 is designated as UNS N08825 and Werkstoff Number 2.4858. It is listed in NACE
MR0175 for oil and gas service.
Rod, Bar, Wire and Forging Stock: 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.
Pipe and Tube: 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
Nickel..........................................................................38.0-46.0
Iron...............................................................................22.0min.
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...................................................................1.0max.
Sulfur..........................................................................0.03max.
Silicon...........................................................................0.5max.
Aluminum......................................................................0.2 max.

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)

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 1180C, finishing at 870 980C. 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 940C. The softest structure is obtained at 980C. 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 550C (1020F),

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