Production and Application
Steel 08X21N6M2T (EP54) is hromonikelmolibdenovym alloy austenitic-ferritic class. Production is regulated by the following guests: 25, 054−81; 5582−75; 5632−72; 5949−75; 7350−77; and TU: 14−1-894−74 and 14−3-59−72. It is used in the manufacture of distillation columns, packed, extraction, rascally, and others. Containers, tanks, storage, and so on. N. This steel is successfully working in the redox environment of acid production, organic synthesis, pulp and paper industry. It is used in the manufacture of acetic acid, melamine, sulfuric acid (92% H2SO4 + 7% SO2 at 50−60 ° C), caprolactam, urea, phosphoric acid (80% H3P04 at 100 ° C). Also, it is used in the preparation of ammonium chloride (by evaporation), sulphite and sulphate pulp (filtering apparatus), and ammonium sulfate with an admixture of sulfuric acid and 20 g / l at 100−110 ° C.
The percentage of alloy GOST 5632−72
Mechanical properties (normalized) at 20 ° C
|GOST||products||Rm N / mm²||σ0,2, N / mm²||δ5,%||ψ,%||KCU, J / cm2|
|TU 14−3-59−72||Pipes hot- and cold-deformed||-||-||20||-||-|
The mechanical properties depending on temperature
6 mm thick sheet, after quenching in water at 1050 ° C
|t °||σ 0,2||σ B||δ 5||t °||σ 0,2||σ B||δ 5|
|Degrees ° C||N / mm²||N / mm²||%||Degrees ° C||N / mm²||N / mm²||%|
σ in — Tensile strength [MPa]
δ 5, — Elongation at break [%]
ip — Reduction [%]
Physical properties at 20 ° C
Density 7.7 g / cm3; electrical resistance of 0.7 ohm • mm 2 / m; 0,126- 10² thermal conductivity W / (m · K); elasticity modulus 0.193 N / mm 2; a magnetic saturation field of 500 Oe is 0.6 / (T · m) /A.Temperaturny coefficient of linear expansion
|t, ° C||20−100||20−200||20−300||20−400||20 -500||20−600||20−700||20−800||20−900|
|α · 106, K-1||9.5||13.8||16||16||16.3||16.7||17.1||17.1||17.4|
In accordance with the following guests: 5582−75, 5949−75 and 7350−77, the steel resistant to intergranular corrosion when tested by the method of GOST 6032−89 AM (24 hours in the control solution). Samples tested after heat treatment specified in CCITT, provocative and after heating to 500 ° C (1 hour) with cooling in air. This steel, like H17N13M2T alloy has a resistance of 1 point in 98% acetic acid, 50% citric acid and 20% formic acid at reflux tº; in 90% formic acid at 40 ° C; H3P04 at different concentrations in concentrated H2SO4, and has high resistance to stress corrosion cracking in the MgCl2 solution.
The hot deformation is carried out at 1150−850 ° C. Steel bends, dies in hot and cold conditions, its workability is the same as that of 10X17H13M2T. Quenched in water from 1050 ° C; the same process is used to remove the work hardening after cold and hot deformation.
With manual and automatic TIG and arc welding using coated electrodes 06X21N6M2T alloy with ANV-17 and St-04H19N11MZ coated electrodes SSSI-13. Welds similar welding seams 10H18N10T have mechanical strength of the base metal resistant to intergranular corrosion and require no heat treatment.
In stock «Electrovek-steel» company offers a wide range of brand rolled 08H21N6M2T 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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