Austenitic
Duplex Steel
Nickel Alloy
Cobalt Alloy

Nickel Alloy 825, UNS N08825, 2.4858, Incoloy 825 Pipe Fittings, Tees, Elbows, Reducers

Nickel Alloy 825 fittings, including tees, elbows, and reducers. This alloy offers excellent corrosion resistance in various environments, such as reducing and oxidizing acids, seawater, and brines. It has good mechanical properties at both high and low temperatures. Whether in chemical processing, oil and gas, or marine engineering, these pipe fittings ensure reliable fluid transportation and system connections, providing long - lasting and stable performance in challenging conditions.

3 quality inspection processes！

1. Secondary inspection of raw materials

Our raw materials come from large factories such as Baosteel, TSINGSHAN, Yongxin...Each batch of raw materials requires MTC and PMI. After the raw materials arrive, we conduct PMI and other inspections again to ensure that they meet the requirements.

2. Traceability of the production process

Hongdi is equipped with CNC lathe, automatic laser cutting machine, 1,000tons hydraunlic press, elbow mandrel machine and other major productionequ equipment.

Each process is supervised by experienced engineers and technicians. Each link is supervised by professional qc inspectors and photographed for archiving. The entire process uses process cards to ensure accuracy and traceability.

3. 100% inspection before shipment

MTSCO has professional QC team to conduct a series of inspections and experiments on the fittings, including routine appearance, PMI, size, quantity, NDT and other inspections. At the same time, we also conducts mechanical testing, chemical composition analysis, intergranular corrosion and other laboratory tests. For welded pipe fittings we carry out 100% ultrasonic or radiographic testing of the raw material and pipe fittings.

In addition, we also accept third-party inspection, such as SGS, TUV, and BV. And the factory has obtained ISO 9001, PED, CRN, M650 and TS certificates.

Application Areas of Alloy 825 Pipe Fitting:

Nickel alloy 825 contains 42% nickel, 30% iron, 21.5% chromium, 3% molybdenum, and added copper and titanium elements. This material exhibits excellent corrosion resistance in high-temperature acidic media and can resist stress corrosion cracking in sulfuric acid, phosphoric acid, and chlorides. The synergistic effect of molybdenum and copper in alloy 825 Pipe Fittings enhances the resistance to local corrosion, and the chromium element forms a stable oxide film, which can withstand oxidation and carburization environments below 980°C. The cold work hardening characteristics enable Reducers and Elbows to maintain high strength, while also having good machinability and weldability, and are suitable for standards such as ASTM B366 and B704.

-Nickel Alloy 825 Tees can replace high-cost Hastelloy alloys in petrochemical, offshore engineering, and nuclear energy equipment, meeting the corrosion resistance requirements in harsh working conditions such as sour oil and gas, and flue gas desulfurization.

-They have high-temperature stability (up to 540°C) and are resistant to chloride ions, and can be used in offshore oil/gas production equipment, especially in acidic gas environments with hydrogen sulfide.

-They are also effective in nuclear fuel reprocessing systems, offshore engineering components, and flue gas desulfurization devices. Their industrial applications also include heat exchangers, pickling tank fittings, and seawater cooling devices in petrochemical refining.