Chrome-nickel steel HN63MB (EP758U) melted open induction method. Used in the manufacture of welded chemical equipment (pulp and paper, chemical, petrochemical industry, and also in pollution control systems). Alloy opposes the action of corrosive media especially containing fluorides, chlorides, organic acids, highly contaminated mineral acids, acidic complex mixture of chemicals at elevated temperatures (above 100 ° C). Its use in the production of synthetic rubber, compound fertilizer, acetic acid, acetic anhydride at t ° from -70 to 500 ° C, and a pressure of not more than 5 N / mm². 14−1-4202−87;: On alloy provides the following specifications 14−3-1478−87; 14−1-4289−87; 14−131−755−85; 14−1-4734−89; 14−1-4881−90.
Mechanical properties at 20 ° C
|According to TU||products||Rm N / mm²||ReH N / mm²||δ,%||ψ,%|
|14−1-4881−90||Hot rolled sheets||852||441||thirty||-|
|14−1-4289−87||Cold rolled sheets||830||440||thirty||-|
The mechanical properties of sheets 10 mm thick, hardened in water at t ° C 1,070 °
|tisp, ° C||ReH N / mm²||Rm N / mm²||δ5,%||ψ,%||KCU, J / cm2|
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|
Mechanical properties at 20 ° C, regardless of the degree of cold deformation lamellar (wire Ø 1,5−3 mm, the hardening process in water before deformation from 1100 ° C)
|The degree of compression,%||ReH N / mm²||Rm N / mm²||δ,%|
Physical properties at 20 ° C
The density of the alloy is 8.9 g / cm3; resistivity is 1.75 Omxmm2 / m; specific heat capacity = 392 DzhDkg- K); thermal conductivity is 0,096×10² W (Dm • K); permeability ≤1,001; modulus = 20×10−4 N / mm2. The values of the temperature coefficient of linear expansion α
|t °||α · 106, K-1|
|From 20 to 100 ° C||9.45|
|From 20 to 200 ° C||9.85|
|> 20 to 300 ° C||10.25|
|From 20 to 400 ° C||10.55|
|From 20 to 500 ° C||10.8|
|From 20 to 600 ° C||10.8|
|From 20 to 700 ° C||11.25|
|From 20 to 800 ° C||11.65|
|From 20 to 900 ° C||11.91|
According to TU 14−3-1478−87, 14−131−755−85, 14−1-4289−87 and 14−1-4202−87, 14−1-4881−90 the alloy should be resistant to intergranular corrosion after provoking tempering at t ° 800 ° C (30 minutes). These tests are carried out in boiling 30% H2SO4 solution with 40 g / l of FeSO4 (48 hours) or in boiling 50% H2SO4 solution with 40 g / l (18 h). Welds are characterized by resistance to intergranular corrosion. In the state of hardening alloy resistant to pitting corrosion in 10% ferric chloride, and stress corrosion cracking in boiling 42% MgCl2.
The alloy is resistant to corrosion in aggressive environments:
- in solutions of inorganic salts (ammonium chloride, aluminum chloride, ferric chloride, ferrous sulphate, calcium chloride, etc.);
- in aqueous solutions of copper and iron chlorides, perchloric, chloric, and chlorosulfonic acid;
- wet and dry chlorine;
- sulfuric acid in 20 to 98% highly resistant alloy (Vkor ≤ 0,1 mm / year) at 90 ° C;
- mineral acids (phosphoric, nitric, hydrochloric, sulfuric) contaminated with chlorides and fluorides;
- in a strongly oxidizing acids and mixtures of chemicals;
- organic acids (acetic, formic, butyric).
The alloy is subjected to cold and hot deformation of almost all methods of forming. The interval of temperature of hot deformation of 1220−950 ° C =. Heat treatment is carried out at 1100 + 20 ° C (excerpt 3−5 min / mm) with quenching in water or rapidly in air. Cutting of the alloy tendency to work hardening is carried out at reduced speeds, the tools of high speed steel or fitted with carbide inserts. Technological recommendations for machining, drilling, turning, pressure, milling and welding developed SRI Khimmash.
When welding argon-arc method is used as an additive wire HN63MVU-VI. When using electric arc welding electrode RLA-21. During manual TIG welding multi-layered, reinforced seam (height) rolls a limited section. At the minimum heat input welding speed should be the maximum, taking into account the breaks between the imposition of the next roller. The strength of welded joints in TIG welding — more than 90% of the base material. Welds are resistant to cracking and intergranular corrosion.
All HN63MB brands presented products are certified. 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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