Sheet, strip 1.4521 - aisi 444
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 02X18M2BT | 1.4521 | 444 | X2CrMoTi18-2 | Delivery from the stock, in stock |
Composition and properties
In accordance with EN 10088-2:2005 (European Union) and ASTM A 240-08 (USA) standard specifications, this steel is composed of
| Alloying element | Content, % |
|---|---|
| Carbon | 0,02 |
| Chromium | 18 |
| Molybdenum | 2 |
| Titanium + Niobium | 0,5 |
| Iron | the rest |
According to its physical parameters the steel has a ferrite microstructure, and in the annealed state it exhibits weak ferromagnetic properties. At a density of 7.7 g/cm3 , the steel has an extremely low coefficient of thermal expansion: in the temperature range of 20...1000 C, this parameter is only 10.4x10-6 1/K. The coefficient of thermal conductivity at room temperature is 23 W/mK, and Young's modulus at the same conditions is 220 GPa.
The steel is characterized by high corrosion resistance under the simultaneous action of chlorine and sulfur vapors, approaching in these parameters to acid-strength austenitic steels such as AISI 316 (1.4404). Under prolonged high-temperature action of corrosive active media, pitting corrosion may occur, which is manifested by individual surface cracks and notches.
Application of
Sheets and strips are produced using conventional cold rolling processes. In comparison with its closest analogues AISI 444 (1.4521) is less sensitive to temperature and time parameters of heat treatment regimes, which reduces the labor intensity of these operations accordingly.
Due to two-component composition stabilization with titanium and niobium, the steel is easily subjected to various machining techniques, including hot and cold forging with significant degrees of deformation. The steel welds well and requires considerable surface heating before joining.
The optimal area of application for sheet and strip steel AISI 444 (1.4521) is the production of containers for hot liquids (including those active in corrosive terms): boilers, industrial heaters and vessels that are under pressure.
The closest domestic analogue of steel - alloy 02X18M2BT, produced in accordance with
Buy a sheet and strip of steel AISI 444 (1.4521), using the proposal of the company Evek GmbH economically and technologically profitable, because the manufacturer accompanies each batch of products with the appropriate certificate of quality.