Silver Tubes is one of the well-known exporting firm of Inconel 825 Pipes & Tubes, which is annealed at 1038 Degree C (1900 Degree F) followed by cooling. Inconel 825 Tubes with excellent corrosion resistance in the first and the second recycling use of the high purity water in the nuclear reactor. When under the high temperature, annealing and state solution of Alloy 825 Pipes has good antioxidant off and high-intensity in the air. Alloy 825 Tubes resists the ammonia, nitriding and carburizing atmosphere, but at the turn of the changes in redox conditions, it will be corrosion by parts of oxidation media. Corrosion rates for Incoloy 825 Pipes in oxidizing and reducing sulfidizing atmospheres, which is further hardened by cold working. Petrochemical works production of catalytic regeneration in the application of more than 700 Degree C recommended the use of Incoloy 825 Tubes, in order to obtain a longer service life.
Inconel 825 Seamless Pipes has especially excellent corrosion resistance to dry chlorine and chlorine hydride applied up to 650 Degree C. Inconel 825 Welded Pipes has high strength over a broad range of temperatures. Mechanical properties of Incoloy 825 Pipes vary with product form and temper. Restricted carbon plus columbium stabilization in Incoloy 825 ERW Pipes permits welded fabrications to be used in corrosive environments, normally without post-weld heat treatment. Although Alloy 825 Seamless Tubes was designed for use in sulphuric acid related industries; the alloy finds wide usage throughout the chemical processing industry.
Incoloy 825, a nickel-iron-chromium alloy under UNS N08825, draws its resistance to sulfuric and phosphoric acid from controlled additions of molybdenum, copper, and titanium. The nominal composition runs 38 to 46 % nickel, 19.5 to 23.5 % chromium, and 22 % iron minimum. Titanium locks up carbon as stable carbides. This prevents sensitisation during welding and keeps the alloy resistant to intergranular attack. Unlike alloys that depend on heat treatment for strength, Alloy 825 develops its properties through solid solution and moderate cold working, reaching a tensile strength of 550 MPa (80,000 psi) with 30 % elongation.
| Alloy UNS N08825 Seamless Pipe and Tube | ASTM B423 / ASME SB423 |
| Alloy UNS N08825 Welded Pipe | ASTM B705 / ASME SB705 |
| Alloy UNS N08825 Welded Tube | ASTM B704 / ASME SB704 |
| Standard | ASTM, ASME and API |
| Type | Seamless / ERW / Welded / Fabricated |
| Length | Single Random, Double Random & Required Length, Cut Length |
| Pipe Size | 15 NB UP TO 825 NB IN SCH 5S, 10S,10, 20, 40S, 40, STD, 60, 80S, 80, XS, 100, 120, 140, 160 & XXS |
| Tube Size | 1 mm OD upto 254 mm OD in 0.2 TO 20 mm thickness. |
| End | Plain End, Beveled End, Treaded |
| STANDARD | UNS | WERKSTOFF NR. | JIS | AFNOR | BS | GOST | EN | OR |
| Incoloy Alloy 825 | N08825 | 2.4858 | NCF 825 | NFE30C20DUM | NA 16 | ЭП703 | NiCr21Mo | XH38BT |
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
| Incoloy 825 | 0.05 max | 1.00 max | 0.5 max | 0.03 max | 1.50 – 3.00 | 22.00 min | 38.00 – 46.00 | 19.50 – 23.50 | 0.02 max | 0.06 – 1.20 |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Incoloy 825 | 8.14 g/cm3 | 1400 °C (2550 °F) | Psi – 80,000 , MPa – 550 | Psi – 32,000 , MPa – 220 | 30 % |
Incoloy 825 and Inconel 625 both resist corrosion in aggressive process environments, but the two alloys differ in strengthening mechanism, maximum service temperature, and the specific acids each handles best.
| Feature | Incoloy 825 | Inconel 625 |
| UNS | N08825 | N06625 |
| Main Strength | Nickel | Molybdenum |
| Typical Applications | Chemical processing, sulfuric and phosphoric acid handling, pollution control, nuclear water recycling | Aerospace components, marine and subsea systems, chemical processing under cyclic loads |
| High-Temperature Strength | Continuous service to 538°C (1000°F); intermittent to 593°C (1100°F) | Cryogenic to 982°C (1800°F) without precipitation hardening |
Incoloy 825 Pipes & Tubes serve industries that combine corrosive process fluids with elevated pressure, where standard stainless grades fail within a few service cycles.
Incoloy 825 Tubes handle sour gas wells containing hydrogen sulfide and carbon dioxide, where chloride stress corrosion cracking destroys standard stainless steel completion strings within months of continuous downhole exposure.
Sulfuric acid and phosphoric acid production units rely on Alloy 825 Pipes to move concentrated acid streams between reactors, since the alloy resists both oxidising and reducing acid attack simultaneously.
Nuclear plants route Incoloy 825 Pipes through primary and secondary water recycling loops, where the alloy resists pitting and crevice attack from high-purity water under continuous reactor operating pressure.
Flue gas desulfurization units use Incoloy 825 Tubes in scrubber internals exposed to hot, wet sulfurous gas streams, conditions that would pit conventional stainless steel within a single operating season.
Offshore risers and umbilical tubing draw on Alloy 825's resistance to seawater pitting and crevice corrosion, holding up in splash zones where oxygen concentration cells attack lower-grade alloys within weeks.
Pickling baths and piping in stainless steel finishing lines use Incoloy 825 Pipes, since the alloy withstands the sulfuric acid pickle and the nitric-hydrofluoric acid rinse in the same circuit.
Silver Tubes, an ISO 9001:2015-certified exporter based in Mumbai, supplies Incoloy 825 Pipes & Tubes in seamless, welded, ERW and fabricated forms. Pipe sizes range from 15 NB to 825 NB across schedules 5S through XXS, while tubes run from 1 mm to 254 mm OD in wall thicknesses of 0.2 mm to 20 mm. Each piece ships with mill test certificates confirming chemical composition and mechanical properties against ASTM B423, B704 and B705. Every shipment carries traceability from heat number through final dispatch.
Incoloy 825 carries the UNS designation N08825, equivalent to Werkstoff 2.4858 in the European standard and NCF 825 under the Japanese JIS system.
Yes. Molybdenum and copper additions give Alloy 825 strong resistance to sulfuric and phosphoric acid across a wide concentration and temperature range, a primary reason process plants specify it.
Incoloy 825 relies on nickel and copper for acid resistance up to 538°C, while Inconel 625 uses molybdenum and niobium strengthening to hold up from cryogenic temperatures to 982°C.
Silver Tubes stocks both. Seamless pipe follows ASTM B423, welded pipe follows ASTM B705, and welded tube follows ASTM B704, covering most project specification requirements.
Seamless product follows ASTM B423 and ASME SB423, welded pipe follows ASTM B705, and welded tube follows ASTM B704, all built to the chemical limits of UNS N08825.
Nickel and molybdenum content drive base cost, while wall thickness, size, form (seamless versus welded), testing requirements, and order quantity all shift the final quoted price per kilogram.
Yes, Silver Tubes cuts tubes from 1 mm to 254 mm OD in 0.2 mm to 20 mm wall thickness, in single random, double random, or fixed lengths.
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