General characteristics

XH78T stainless high-temperature resistance circle has a complex composition of nine basic elements. Plasticity and toughness of the composition owes 78% of nickel - this greatly simplifies the rolling and weldability of the metal. CrN78T may be referred to as EI435. Foreign analogues are 2.4951NiCr20Ti (Germany), GH3030 (China). The nickel base gives high ductility. It makes cold rolling much easier. The main alloying elements form a surface oxide film that protects the wire from corrosion and can be easily restored if damaged. At t° 1100 °C the surface oxidation rate is 2 mm in 10 years. Chromium increases chemical resistance and heat resistance, while titanium gives the wire structural uniformity and strength.

Chemical composition

Disadvantages

Such expensive elements as Cr, Ni, Ti increase the cost of the disk. But the high strength and durability of the alloy CrN78T, the possibility of recycling the material - translates the costliness of the disk practically into long-term investment. The disadvantages include instability in sulfuric environment, which causes embrittlement.

Properties at 20°C

Tensile strength is 880 MPa, decreasing at 1100 °C to 40 MPa. The yield strength does not exceed 300 MPa, at its lowest value of 98 MPa at 800 °C, after which it starts to increase. By 1100 °C it rises to 105 MPa. Relative elongation at break is up to 40%. At 900 °C a maximum elongation of 90% is recorded. Specific weight 8.38 g/cm³; modulus of elasticity of the 1st kind 2.19 MPa; coefficient of linear expansion 12.2 [1/Grad]; Heat capacity up to 14.6 W/(m-rad).

Application

Heat resistance and a significant specific resistance of 1.1 Ohm xmm2 / m, allows the use of a circle for heating elements designed for long-term operation at t ° up to 1100 ° C. Very often it is used in the manufacture of welded structures operating in corrosive environments in the chemical, pulp and paper, oil refining and gas industry. It is difficult to do without it in the production of paint products, mineral fertilizers. CrN78T electrodes are used for welding of chromium-nickel alloys and metal structures of carbon steel. The advantages of a disk of CrN78T allow its use in the production of welded structures operating at temperatures up to 1100 ° C. It is indispensable in the manufacture of combustion chambers of jet turbines, works reliably under the influence of heavy loads. They make plugs, bolts, various threaded connections, studs, nuts with high corrosion resistance and high wear resistance. Expands the scope of the circle and the fact that it is perfectly welded.

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At the warehouse of Evek GmbH a wide range of products of the brand XH78T standard and non-standard parameters. All presented products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, the mechanical properties of products. From us you can buy in bulk any semi-finished products for large-scale productions. We also offer optimum conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.

Buy at the best price

We offer for sale an unlimited range of chromium-nickel alloys of the highest quality at a competitive price. If you have difficulty in choosing, experienced managers are always available and ready to provide advice. Order with us and you will receive certified products that meet international quality standards in the shortest possible time. If you value your time, contact our nearest office today or place your order online.