NS111 is a Fe-Ni-Cr-based solid solution strengthened deformed high temperature corrosion resistant alloy, used below 1000 ºC, Shanghai Shanghu believes that NS111 has excellent high temperature corrosion resistance and excellent process performance, excellent design stability, processing and welding. Excellent function, easy to form by cold and hot processing, suitable for making parts that require high temperature and long-term work under severe corrosive medium conditions.
NS111 fulfills a series of norms that regulate various countries,
Foreign specifications are generally UNS, ASTM, AISI, DIN,
And our national standard standard has trademark standard GB/T15007,
Rod specification GB/T15008, plate specification GB/T15009,
Tube specification GB/T15011,
With specification GB/T15012.
Corresponding trademark:
German standard: 1.4876, X10NiCrAlTi32-20,
American Standard No8800, NS111,
National standard GH1180, NS111, 0Cr20Ni32Fe,
chemical composition:
Carbon C: ≤0.10,
Silicon Si: ≤1.0,
Manganese Mn: ≤1.50,
Chromium Cr: 19~23,
Nickel Ni: 30.0~35.0,
Aluminum Al:≤0.15~0.6,
Titanium Ti: ≤0.15~0.6,
Copper Cu: ≤0.75,
Phosphorus P: ≤0.030,
Sulfur S: ≤0.015,
Iron Fe: 0.15 to the balance.
Outstanding Features:
(1) Good resistance to stress corrosion cracking.
(2), good corrosion resistance and crevice corrosion performance
(3), good antioxidant and non-oxidative thermal acid function
(4) It has good mechanical function at high temperature of room temperature up to 550ºC
(5) Certification of pressure vessels with manufacturing temperature up to 450ºC
Physical function:
(1) Density: ρ=8.1g/cm3
(2), melting temperature range: 1370 ~ 1400 ºC
Machining and Welding:
Excellent thermal processing performance, thermal processing temperature is 900~1200,
Hot bending is formed at 1000~1150 degrees,
It is reminded that in order to reduce the intergranular corrosion tendency of the alloy, the 540~760 degree sensitization zone should be passed as quickly as possible.
Center softening annealing is required during cold working.
The heat treatment temperature is 920~980.
The solution temperature is 1150~1205.
use:
1. Heating tubes, containers, baskets and chains used in sulfuric acid pickling factories.
2. Seawater cooling heat exchanger, marine product piping system, acid gas environment piping.
3. Heat exchangers, evaporators, and dip tubes in phosphoric acid production.
4. Air heat exchanger in petroleum refining
5. Food Engineering
6. Chemical process
7. Flame retardant alloy used for high pressure oxygen.
NS111 (N08825, 2.4858) alloy hot working:
The suitable hot working temperature of NS111 alloy is 1150-900ºC, and the cooling method can be water quenching or rapid air cooling. When hot working, the workpiece can be fed directly into the furnace that has already arrived. After the furnace is warm, the holding time of the material is 60 minutes per 100mm thickness. Immediately after holding for the specified time, it is released from the furnace and processed within the specified temperature range. If the temperature of the metal falls below the minimum processing temperature, it should be reheated. It should be annealed in time after hot working to ensure the best corrosion resistance and suitable crystal structure.
NS111 (N08825, 2.4858) alloy cold working:
Cold working should be carried out after solution treatment. The work hardening rate of NS111 is close to that of austenitic stainless steel, so the processing equipment should be adjusted accordingly.
When the amount of cold working is large, there should be a center annealing process. When the final cold deformation is greater than 15%, final stabilization treatment is required.
NS111 (N08825, 2.4858) alloy heat treatment:
The temperature range of softening annealing or stabilization treatment is 920-980°C, and the most suitable temperature is 940±10°C. For workpieces with thickness greater than 1.5mm, water quenching or rapid air cooling are recommended to obtain maximum creep resistance.
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