Sheet, strip 1.4521 - aisi 444
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 02Х18М2БТ | 1.4521 | 444 | X2CrMoTi18-2 | Delivery from the stock, in stock |
Composition and properties
In accordance with standard specification EN 10088−2:2005 (EU) and ASTM A 240−08 (USA) in the composition of the steel comprises:
| Alloying element | Content, % |
|---|---|
| Carbon | 0,02 |
| Chrome | 18 |
| Molybdenum | 2 |
| Titanium+Niobium | 0,5 |
| Iron | the rest |
The physical parameters of the steel has a ferritic microstructure, in the annealed condition exhibits a weak ferromagnetic properties. At a density of 7.7 g/cm3 of steel has a very low coefficient of thermal expansion in the temperature range 20…1000 With this parameter is 10. 4x10-6 1/K. the Coefficient of thermal conductivity at room temperature of 23 W/MK, and young’s modulus under the same conditions is 220 GPA.
Steel has high corrosion resistance under simultaneous action of vapour of chlorine and sulphur, coming by these parameters to Colletotrichum austenitic steels of type AISI 316 (1.4404). With prolonged high temperature exposure to corrosive environments possible focal manifestations of pitting corrosion, which are expressed in a separate surface cracks and notches.
Application
Sheet and strip from this steel are obtained by the usual technology of cold rolling. In comparison with the closest analogues steel AISI 444 (1.4521) is less sensitive to time-temperature parameters of the heat treatment regimes, which consequently reduces the complexity of performing these operations.
Thanks to the two-component stabilizing composition using titanium and niobium, steel is susceptible to various technologies of mechanical processing, including hot and cold forging with significant degrees of deformation. Steel is good welded, and requires considerable heating of the surface before connecting.
The scope of the optimal use of sheets and strips of steel AISI 444 (1.4521) — manufacture of containers for hot liquids (including active corrosion): boilers, process heaters, and vessels that are under pressure.
The closest domestic analogue steel — alloy 02Х18М2БТ produced according to GOST 5632. In contrast to the stamps, in its chemical composition niobium is present instead of copper.
To buy the sheet and strip steel AISI 444 (1.4521), using the company’s offer Electrocentury-steel economically and technologically advantageous because the manufacturer of each batch of products is accompanied by the appropriate certificate of quality.
