1.4521 - aisi 444 pipe, wire, circle
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|02Х18М2БТ||1.4521||444||X2CrMoTi18-2||Delivery from the stock, in stock|
Composition and properties
Steel AISI 444 (1.4521) corresponds to the conventional specification EN 10088−2:2005 (EU) and ASTM A 240−08 (US). It is composed of the following chemical elements:
|Content, %||0,02||18,0||2,0||Together — 0,5||Basic Foundation|
Due to low carbon content steel in the rolling condition has a purely ferritic structure. During the primary heat treatment — annealing — steel AISI 444 (1.4521) shows weak ferromagnetic properties. The alloy is characterized by a density of 7.7 g/cm3, and has a low coefficient of thermal expansion in the temperature range from 20 to 1000 C it is only 10. 4x10-6 1/K. This material is typical high thermal conductivity, which is fully preserved in the temperature range 20…2000 C. the coefficient of thermal conductivity is 23 W/MK and the modulus of elasticity is 220 GPA.
A distinctive feature steel AISI 444 (1.4521) is its increased corrosion resistance, which persists in the simultaneous presence of particularly active gaseous media, corrosive — vapours of hydrochloric and sulphuric acids. According to these characteristics, the alloy is almost identical Colletotrichum austenitic steels, in particular AISI 316 (1.4404), smelting cost which costs significantly more expensive. However, prolonged exposure to high temperatures and elevated concentrations of vapours on the inner surface of pipes the possible emergence of foci of pitting corrosion. This should be considered when using this steel as a material for gas — and pipelines.
Tube, bar and wire made of this alloy are produced by conventional methods of cold and/or hot rolling. The advantage of steel (in comparison, for example, steel AISI 444) is less dependence on the accuracy of the compliance regimes of hardening treatment. This allows consumers to reduce their current operating costs.
A distinctive feature of this alloy is its two-component stabilization, which is produced by the combined effect of niobium and titanium in the smelting process. Therefore, the AISI 444 (1.4521) is stably processed by cutting and deforming equipment in hot and cold conditions. Wire and the circle of this alloy is amenable to drawing with large degrees of deformation, and can be cold landing on multiple machines, for receiving fasteners. Welding conditions of steel do not differ from other materials of this class.
Pipe in stainless steel AISI 444 (1.4521) are used in the manufacture of pipelines, pumping chemically active environment, which may be accompanied by intense corrosion phenomena. The circle and the wire from this alloy used in the manufacture of precision machine instrumentation in pharmaceutical, chemical and metallurgical industries.
The domestic steel industry produces alloy 02Х18М2БТ that its composition is virtually no different from steel AISI 444 (1.4521).
Tube, bar and wire AISI 444 (1.4521), proposed for implementation by the company Electrocentury-steel is a guarantee of quality, as evidenced by the attached to each party of rental certificates.