Steel 20KH5ML
Designation
Description
20KH5ML steel is used: for the manufacture of the 1st, 2nd and 3rd groups casting parts of valves of oil refining units operating at temperatures of the working medium from -40 to +650 °C without restriction of the nominal working pressure; furnace doubles, pump casings and other components operating in hot oil environments containing sulfur compounds under pressure at temperatures up to +550 °C; casting parts of valves and actuators to it; for the manufacture of pipes tsentrobezhnolityh for the manufacture of coils of tubular furnaces in the production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm2).
Note
Stainless steel in hot oil environments containing sulfur compounds, heat-resistant martensitic class. Heat resistance to +600 °C.
Standards
Chemical composition
Fe is the basis.
According to GOST 977-88 molybdenum can be replaced by titanium in an amount of no more than 0.10%, provided that the parts are operated at a temperature of no more than 425 ° С.
According to GOST 2176-77 the chemical composition is given for steel grade 20Х5МЛ. Deviations from the norms of chemical composition are allowed: for carbon ± 0.020%; for silicon ± 0.10%; on manganese, copper, chromium and nickel ± 0.10% each; by titanium and tungsten ± 0.050% each; by vanadium, molybdenum and niobium ± 0.020% each.
According to GOST 977-88 molybdenum can be replaced by titanium in an amount of no more than 0.10%, provided that the parts are operated at a temperature of no more than 425 ° С.
According to GOST 2176-77 the chemical composition is given for steel grade 20Х5МЛ. Deviations from the norms of chemical composition are allowed: for carbon ± 0.020%; for silicon ± 0.10%; on manganese, copper, chromium and nickel ± 0.10% each; by titanium and tungsten ± 0.050% each; by vanadium, molybdenum and niobium ± 0.020% each.