Pipe made of HN78T
This grade HN78T is manufactured with a help of open-type remelt method. This alloy is widely used in industries for manufacturing floating details that are exploited at a temperature range of 1000−1100°C (f. e. in manufacturing of flame tubes, thermocouple cases, combustion chambers etc.)
International analogous grades of alloy are marked as 2.4951NiCr20Ti (Germany), GH3030 (PR China). Alloy has main types of mill-products: tube, wire, strip, sheet, rod. Due to high nickel content, it relates to a group of heat-resisting materials. Its main demerit is non-stability to environments that contain sulphur. It causes a brittle behavior. Its oxidation rate is 0,2 mm/h up to a temperature of 1100 °C.
Chemical composition of alloy
Mechanical properties at t° of 20°С
— short term limit of lasting-quality is from 590 up to 880 MPa (depending on a type of product). It decreases with a temperature rising;
— elongation at break is not more than 40%;
— in a process of heating up to 900 °C a maximum elongation ration is 90%;
— for permanent deformation a flow limit changes depending on type of mill-products. It does not exceed 300 MPa; A minimal index at a temperature of 800 °C is 98 MPa. When a temperature is closer to 1100 °C, it rises to 105 MPa;
— contraction ratio is not more than 50%;
— heat treatment performs at a temperature of 980 — 1100 °C. There is recommended a method of thermohardening in air or in water.
Physical characteristics at the temperature 100 °C
— thermal-expansion coefficient is 12,2 [1/deg];
— module of elasticity is 2,19 MPa;
— heat conduction coefficient or heating capacity of alloy is not more than 14,6 V/(m-deg);
— alloy density is 8, 38 g/cm³. It can insignificantly change at a temperature rising;
— electrical resistivity- 1,1 Ohm-mm2/m;
Alloy is used in manufacturing a bar section and detail forging. They work at a temperature that does not exceed 1100 °C. Alloy is widely used in aircraft mechanical engineering, manufacture of engines. Wire of this alloy is in much-request when welding nickel alloys in energetic mechanical engineering or when welding metallic constructions made of carbon and stainless steel. While doing this, there must be used electrodes and all-rolled wheels. Welding is performed with a previous heating up to a temperature of 200−300°С and further annealing of seams.
HN78T pipe supplier
«Auremo» supplier offers to buy HN78T pipe by wholesale. There is a wide range of half-finished goods in stock. They are compliant with GOST and International Standards. Tube HN78T is always in stock. You can buy it for an affordable HN78T pipe price from a supplier. Buy HN78T pipe in a moment! HN78T pipe price is privileged for wholesale customers.
Buy at a bargain price
«Auremo» company proposes to buy HN78T pipe on favorable terms. A wide range of goods for scaled-up fabrications is presented in stock. HN78T pipe price is conditioned by technological details of production without including additional expenses. You can find a price-list, a catalog of production and all information about it on company’s web-site. HN78T pipe price depends on order quantity and additional conditions of supply. You can easily find us through the Internet. «Auremo» HN78T pipe supplier offers to buy products by wholesale. «Auremo» company is a profitable HN78T pipe supplier in this segment. Buy HN78T pipe in a moment! A quality is compliant with GOST (all-Union State Standards) and International Standards. There is an affordable price from HN78T pipe supplier. We are waiting for your orders.