Sheet, round, wire KHN58V - ЭП795
Alloy ХН58 (ЭП795)
Steel Nickel-based ХН58 is smelted IN an open induction method. Used in the manufacture of welded equipment operating in solutions of HNO3, i.e. in the presence of fluorine ions, for example, in hydrofluoric-nitric acid pickling solutions. Used in the manufacture of welded pickling baths. For steel ХН58 provided IN the next TU: 14−131−224−75; 14−1-2715−79; 14−1-4362−87; 14−1-4363−87; 14−131−756−88; GOST 5632−72.
|From 39 to 41||≤0,8||≤1||DOS.||≤0,015||≤0,012||≤0,15||From 0.5 to 1.5||≤0,03|
Mechanical properties KHN58V
Mechanical properties for sheet thickness of 3 mm, quenching at 1070 °C in water
|tисп, °C||σт, N/mm2||σв, N/mm2||>δ5%||ψ, %|
Mechanical properties at high temperature (rod size 90 mm, the process of quenching from 1100 °C in water)
|tисп, °C||σт, N/mm2||σв, N/mm2||δ, %||ψ, %||KCU, j/cm2|
Physical properties at 20°C
Alloy density 8.1 g/cm3; elastic modulus of 22.4 · 10−4 N/mm2; specific resistivity of 1.18 Ohm·mm2/m, and specific heat equal to 375 j/(kg · K) thermal conductivity at 100 °C = 0,126 · 102 W/(m · K).
Values of temperature coefficient of linear expansion α
|10||α · 106, K-1|
|From 20 to 100°C||10,4|
|From 20 to 200°C||10,8|
|>From 20 to 300°C||10,95|
|From 20 to 400°C||For 11.55|
|From 20 to 500°C||11,9|
|From 20 to 600°C||12,3|
|From 20 to 700°C||12,85|
|From 20 to 800°C||12,89|
|From 20 to 900°C||13|
Resistance to corrosion
THAT 14−131−224−75, 14−1-4362−87, 14−1-4363−87 GOST 3239−81 normalized resistance to intergranular corrosion after provoking tempering at t° 700 °C (half-hour), air-cooled, and after the test method do GOST 6032−89. Welded joints are resistant to intergranular corrosion in the etching solution of 16−18% HNO3 + 4% HF at a temperature of 50−60°C. After quenching the alloy corrosion rate in boiling 10−58% HNO3 no more than 0, 2 mm for 10 years.
Speed to corrosion
|Corrosive environment||KHN58V||18CR10NITI||νкор, mm/year|
|Etching solution (16−18% HNO3 + 4% HF)||50−60°C||0,14||>1|
|14 M HNO3 + of 0.05-m solution of HF||94 °C||0,36||>1|
|14 M HNO3 + 0,1 M HF solution||94 °C||0,59||>1|
|40−45% HNO3 WITH A 0.2−0.9% HF + 0,2−1% HC1||105 °C||0,2||4−13|
The alloy is subjected to cold and hot deformation, almost all methods of forming. The temperature interval of hot deformation is 1200−950°C. Heat treatment of metal is heated to t° 1070−1100°C (delay of 3−5 min/mm of maximum cross-section) and cooling rapidly in air or in water.
This alloy is welded by manual argon-arc welding and electric arc (more than preferably the latter). During TIG welding as an additive an alloy of the basic composition, i.e. ХН58 IN the form of wire. The arc welding is done with electrodes FKH-26 and FKH-13. The welding is performed in the regime of low linear energy (0,6−1,5 kJ/mm). Welded connections are prone to cold and hot cracks, are resistant to intergranular corrosion in fluoride-nitric solutions.
All the products IN ХН58 certified. In the technical documentation included data on chemical composition, limiting the percentage of impurities; mechanical qualities of the products. We can buy in bulk any semi-finished products for large-scale production. We also offer optimal conditions for retail customers. A high level of service and speed of service are the face of our company.
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