02H21N25M5DB Stainless Steel (EK5)
02H21N25M5DB steel grade refers to the chrome-nickel steel austenitic. Smelted in an open electric arc, vacuum induction furnaces. Production of standardized specification requirements; 14−1-2973−80; 14−1-3686−83; 14−1-3230−81; 14−1-4730−89; 14−3-1129−82.Primenyayut the manufacture of welded chemical equipment that operates under mild acidic technological solutions at pH = 1 and t ° to 80 ° C, in media containing chlorine and fluorine ions in heavy erosive wear.
The percentage of
|≤0,02||≤0,02||20 — 22||1.3 — 1.8||0.01 — 0.1||1 — 1.5||4 — 5||0.2 — 0.4||24 — 26||≤0,02||≤0,02||≤0,2||The basis|
The mechanical properties at 20 ° C
|TU||products||σ in N / mm²||σ t N / mm²||δ 5%|
|14−1-4730−89||sheet metal, cold||490||245||40|
The mechanical properties at room and at elevated tº (6 mm sheet, quenching in water from 1070 ° C)
|es t, ° C||σ 0,2, N / mm²||σ in N / mm²||δ 5%||KCU, J / cm 2|
The mechanical properties at high tº (6 mm sheet, quenching in water from 1070 ° C)
|es t, ° C||σ 0,2, N / mm²||σ in N / mm²||δ 5%||ψ,%||KCU, J / cm 2|
The density of 8,02g / cm3.
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||15.3||16.1||16.4||16.9||17.1||17.7||18.4||18.7||19|
In accordance with the following specifications: 14−1-2973−80, 14−1-3230−81, 14−1-473 089, and 14−1-3327−81 14−3-1129−82, this steel is resistant to intergranular corrosion after provoking heating (t = 700 ° C, 20 minutes). Tests carried out by the method of VU GOST 6032−89. We also note the fact that this steel is resistant to pitting corrosion in media containing halogens. The steel is intended for use in acid environments saturated with chlorine and fluorine ions, in heavy erosive wear.
The corrosion resistance of the alloy in different media
|corrosive environment||> T, ° C||> ν core, g / (m ² · h) (not more)|
|F = 40 g / l, Cl = 25 g / L, pH = 3.7||80||0.1|
|When stirring sufficiently vigorous 26−52% H 3 PO 4, F = 1,5%, the solids to 54%||80||0.8|
|60% sulfuric acid||60||0.03|
|90% sulfuric acid||60||0,023|
|20% acetic acid||Boiling||0,004|
|50% formic acid||140||0,074|
|80% formic acid||140||0.09|
|28.4% formic acid||150||0.08|
Available cold and hot deformation. The temperature range of the hot plastic deformation of 1200−950 ° C.
Use manual TIG method. As filler material for argon arc welding using welding wire grade Sv-02H21N25M5DB (EK5U).
All submitted 02H21N25M5DB rental brand certified. 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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