The alloy HN58 (EP795)
Steel nickel-based HN58 in melted inductively open. Used in the manufacture of welded equipment that operates in a HNO3 solution in t. H. In the presence of fluoride ions, for example, fluor-nitric pickling solutions. Used in the manufacture of welded pickling baths. In steel In HN58 has the following specifications: 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||Bas.||≤0,015||≤0,012||≤0,15||0.5 to 1.5||≤0,03|
Mechanical properties HN58V
Mechanical properties of the sheet to 3 mm thick, quenching process at 1070 ° C in water
|tisp, ° C||ReH N / mm²||Rm N / mm²||> Δ5%||ψ,%|
The mechanical properties at high temperature (bars measuring 90 mm, the quenching process from 1100 ° C in water)
|tisp, ° C||ReH N / mm²||Rm N / mm²||δ,%||ψ,%||KCU, J / cm2|
Physical properties at 20 ° C
Alloy Density 8.1 g / cm3; modulus 22.4 · 10−4 N / mm2; resistivity of 1.18 ohm mm2 / m and equal to the specific heat of 375 J / (kg · K), thermal conductivity at 100 ° C = 0,126 · 10² W / (m · K).
The values of the 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|
|> 20 to 300 ° C||10.95|
|From 20 to 400 ° C||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|
TU 14−131−224−75, 14−1-4362−87, 14−1-4363−87 GOST 3239−81 normalized resistance to intergranular corrosion after provoking leave at t ° 700 ° C (half an hour), air-cooled, and and after the test method of control GOST 6032−89. Welds are resistant to intergranular corrosion in the pickling solution 16−18% HNO3 + 4% HF at t ° 50−60 ° C. After quenching, the alloy corrosion rate in boiling 10−58% HNO3 not greater than 0, 2 mm for 10 years.
|corrosive environment||HN58V||X18H10T||νkor mm / year|
|The etching solution (16−18% HNO3 + 4% HF)||50−60 ° C||0.14||> 1|
|14 M solution of HNO3 + 0.05 M HF solution||94 ° C||0.36||> 1|
|14 M HNO3 solution + 0.1 M HF solution||94 ° C||0.59||> 1|
|40−45% HNO3 + 0,2−0,9% HF + 0,2−1% HC1||105 ° C||0.2||4−13|
The alloy is subjected to cold and hot deformation of almost all methods of forming. The interval of temperature of hot deformation of 1200−950 ° C. Heat treatment of metal is heated to t ° 1070−1100 ° C (delay 3−5 min / mm maximum cross section) and cooled rapidly in air or water.
This alloy is welded manual TIG welding and arc (more preferable — the latest). During welding argon is used as an additive alloy core structure, i.e. in a HN58 wire. Arc welding is performed electrodes FH-26 and FX-13. Welding is performed in a low heat input mode (0.6−1.5 kJ / m). Welded joints are not prone to the formation of hot and cold cracking, have resistance to intergranular corrosion in the nitrogen-fluoride solutions.
All presented products are certified in grade HN58. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
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