Alloy 02H25N22AM2-PT (CHS108-PT)
Mark 02H25N22AM2-PT refers to high-alloy steel austenitic. Smelted in furnaces, plasma, using pure charge materials. Production is normalized by the following specifications: 14−134−277−91; 14−1-5072−91; 14−1-5203−93; 14−159−252−95.Eto especially nitrogen-containing low carbon steel is structurally stable. It is used in the manufacture of equipment for the production of urea at a pressure of ≤ 200 N / mm 2 and t ° from -70 ° to + 200 ° C. The exceptional strength and resistance to corrosion can be used instead of a steel 03H17N14MZ brand that provides a reduction of metal equipment, increases reliability, durability. This steel is also advisable to use for working in phosphoric, nitric and sulfuric acid media, and instead of the brand or H17N14M2T H17N14M3T under conditions conducive to the appearance of pitting corrosion. This steel is used for operation in environments containing hydrogen sulfide with partial pressure of H 2 S ≤ 3.0 N / mm 2 or CO ≤ 30 N / mm 2 at t ° to 150 ° C.
The percentage of
|≤0,02||24 -26||≤0,4||2,4 2,5||1.5 -2||0.1 — 0.14||21 -23||≤0,020||≤0,015||The basis|
The mechanical properties at 20 ° C
|TU||products||σ in N / mm²||σ t N / mm²||δ 5%|
The mechanical properties at low and high t º (sort of Ø 40 mm, hot-rolled)
|es t, ° C||σ 0,2, N / mm²||σ in N / mm²||δ,%||ψ,%||KCU, J / cm 2|
Note to the table: toughness after hardening process of t 1100 ° C. The samples are not destroyed.
The mechanical properties at high tº (Ø 40 mm grade)
|es t, ° C||σ 0,2, N / mm²||σ in N / mm²||δ,%||ψ,%||n of|
Steel’s density is 7.98 g / cm 3.
Temperature coefficient of linear expansion α
|t, ° C||From 20 to 100||From 20 to 200||From 20 to 300||From 20 to 400||From 20 to 500||From 20 to 600||From 20 to 700||From 20 to 800||From 20 to 900|
|α · June 10, K -1||15.6||16.2||17.4||17.8||18.2||18.7||19.1||19.5||19.9|
According to further TU 14−159−252−95, 14−1-5203−93 steel comes after tempering at t ° to 1100 ° C without provoking leave. Reception to intergranular corrosion when tested according to GOST 6032−89 method of control in boiling 65% HNO 3, 5 to 48 clock cycles. The corrosion rate after each of the cycles does not exceed 0.3 mm / year. According to T. W. 14−1-5072−91 long products and TU 14−134−277−91 (round billets) must comply with the above mentioned requirements. Susceptibility to intergranular corrosion is checked on the samples after the heat treatment (at t ° 1100 ° ± 10 ° C, air cooling without provoking holiday).
Corrosive — samples cut from grade Ø 40 mm (value in the numerator) and grade Ø 120 mm (value in the denominator) when tested by the method of control
|heat treatment||cycle I||cycle II||III cycle||IV cycle||cycle V|
|The hot rolling process||0.1 / 0.13||0.06 / 0.07||0.05 / 0.07||0.06 / 0.07||0.05 / 0.04|
|Process quenching t 1000 ° C||0.11 / 0.12||0.08 / 0.08||0.05 / 0.06||0.06 / 0.06||0.07 / 0.06|
|Process quenching t 1100 ° C||0.12 / 0.12||0.07 / 0.08||0.05 / 0.06||0.06 / 0.07||0.06 / 0.07|
|Process quenching t 1100 ° C + 650 rental t ° C, 1 hour||0.15||0.11||0.11||0.05||0.05|
Steel resists intergranular corrosion test according to the procedure of GOST 6032−89 slave, after a 5 hour annealing at t ° 600−800 ° C. Welded joints are not prone to intergranular corrosion, including corrosion of the blade type when exposed to a solution with 40% HNO3 + 2% HF (at 95 ° C, for 48 hours). This steel has a high resistance to local and types of corrosion (pitting, crevice in environments rich in chlorides), and stress corrosion cracking in a hydrogen sulfide environment.
This steel — high-tech, available hot and cold plastic deformation. The temperature range of the hot deformation of 1230−980 ° C. The hardening is carried out at t ° to 1100 ± 10 ° C with cooling in water. The same heat treatment used to relieve work hardening, after the hot and after cold deformation. In the hot rolled condition the structure of fine-grained austenitic steel (№ 9−10); almost no ferrite (<0.5%). the metal itself is pure non-metallic inclusions. Recrystallization of austenite grains in sheet steel goes samples during warming to t ° 1100 ° C, after holding sheet metal structure has a grain size № 7-8.
Use manual TIG method with filler wire Sv-01H23N23MZTZ. Sutures are not prone to intergranular, corrosion of the blade when operated in oxidizing environments.
In stock «Electrovek-steel» company offers a wide range of hire brand-Fri 02H25N22AM2 any parameters. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
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