Alloy 01H25TBYU-VI (ES-76)
Mark 01H25TBYU-VI (ES-76) belongs to the ferritic chromium steels. It serves as the basis welded equipment (evaporators) for the chemical and processing industry. It is used for the synthesis of caustic soda, sodium sulfide. Can replace 15H25T grade steel for welded structures. Steel 01H25TBYU-VI melted in vacuum induction furnaces. The production technology is normalized by the following specifications: 14−1-3996−85; 14−1-3547−83; 14−3-1275−83.
The percentage of
|≤0,01||≤0,15||≤0,01||0.1−0.3||≤0,7||24−26||0.1 0.3||≤0,5||≤0,4||≤0,01||≤0,015||The basis|
The mechanical properties of the alloy at 20 ° C
|TU||assortment||σ in N / mm²||σ 0,2, N / mm²||δ 5%|
Alloy Density — 7.6×10 3 kg / m 3; permeability — 2.1 (mT · m) / t A at 20 ° C; modulus — 20,4 · 10 -4 N / mm 2 at t 20 ° C.
The values of coefficient of linear thermal expansion
|t, ° C||50−150||50−200||50−300||50−400||50−600||50−700||50−800||50−900||50−1000|
|α · June 10, K -1||9.5||10||10.6||10.8||11.5||11.6||12.2||12.2||12.2|
According to the specifications 14−3-1275−83, 14−1-3547−83, 14−1-3622−83, this brand is not prone to intergranular corrosion when tested by the method of GOST 6032−89 AMU. Preliminary sample was heated for 30 minutes at t ° 1100 ° C with subsequent cooling in air. Steel this brand is characterized by high capacity samopassivatsionnoy in hot concentrated alkaline solutions, high resistance to cracking gap.
Corrosion resistance in different environments (including manufacturing conditions)
|corrosive environment||es t, ° C||ν core, (g / m²ch)|
|Sodium sulphide (evaporator boiler)||130||0.02−0.2|
|Electrolytic alkali (evaporators)||120 to 140||0.01|
|Potassium chloride — screw (halurgical) solvent||95 to 110||0,002|
|Sodium sulfate (evaporators)||170||0.14|
|Technological environment of textile finishing industries, as well as the development of chemical fiber; gipohloridnoe and chlorine bleaching of flax; dyeing yarns c / b sulfur dyes||80||0.03|
|Brine NaCl (306 g / l)||50 to 60||0,001|
|Strontsiysoderzhaschego pulp sludge production nitroammophos||85||0.0013|
Technological processing parameters
Hot working temperature range is from 1160 to 850 ° C. Water quenching is performed by heating 850−900 ° C.
Recommended TIG method using wire Sv-01H25TBYU.
Brittle fracture resistance (tube size 038×2 mm by water quenching from 850 ° C)
|View sample||KCU, J / cm 2, t test, ° C||%|
|Do not weld||130||115|
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