Steel 08Х20Н4АГ10 (NN-3)
|Designation GOST Cyrillic||08Х20Н4АГ10|
|Designation GOST Latin||08X20H4AG10|
|By chemical elements||08Cr20Н4NMn10|
|Designation GOST Cyrillic||НН-3|
|Designation GOST Latin||HH-3|
|By chemical elements||НН-3|
08Х20Н4АГ10 steel is used: for the production of rolled products, forgings and stampings used in the manufacture of parts in shipbuilding and ship repairs; hull structures of ships, vessels and goods marine equipment (propeller shaft low-speed gear, axles, spindles, slides, shafts, couplings, rods, cylinders, brackets).
Corrosion resistant, low alloyed steel high-strength austenitic.
When cold deformation is not more than 75%, the magnetic permeability μ ≤ 1,01 GS/C. Heat treatment on the magnetic permeability is not affected.
|Processing of metals by pressure. Forgings||В03||OST 5Р.9125-84|
|Castings, non-ferrous metals and alloys||В84||RD 9257-76|
|Bars and shapes||В32||TU 14-1-784-73, TU 14-1-1550-76|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-853-74|
|Castings with special properties (iron and steel)||В83||TU 5.961-11131-79|
According to TU 14-1-853-74, deviations from the content of elements in terms of the chemical composition of steel 08Х20Н4АГ10 (НН-3) are allowed: carbon +0.010%, manganese + 0.50%, nickel + 0.50%, chromium + 0.50%, vanadium +0.10%, niobium +0.10%, nitrogen +0.030%, phosphorus +0.0050%, silicon + 0.20%. The residual content of elements in the chemical composition of the steel should not exceed: copper, cobalt, tungsten and molybdenum 0.30% of each element.
According to TU 14-1-784-73, the chemical composition is given for steel grade 08Х20Н4АГ10 (НН-3). Deviations in chemical composition are allowed: for carbon +0.010%, for manganese + 0.50%, for nickel + 0.50%, for chromium + 0.50%, for niobium +0.10%, for silicon +0.20 %, in nitrogen +0,030%, in phosphorus +0,0050%, in vanadium +0,10%. The residual content of elements in the chemical composition of the steel should not exceed: copper, cobalt, tungsten and molybdenum 0.30 each.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||KCU, kJ/m2||HB, MPa|
|Hot rods and forgings of round and square. Quenching in water or air from 950-980 °C|
|Forgings for parts resistant to the ICC. Quenching in water or air from 950-1050 °C|
|Bars hot rolled and forged, round and square. Quenching in water from 900-1050 °C|
Description mechanical marks
|sT|s0,2||Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%|
|σU||Limit short-term strength|
|d5||Elongation after rupture|
|HB||Brinell hardness number|
|Temperature||Е, HPa||r, kg/m3||l, W/(m · °C)||R, Mr. · m||С, J/(kg · °C)||a, 10-6 1/°C|
A description of the physical symbols
|Е||The normal elasticity modulus|
|l||Coefficient of thermal conductivity|
|R||UD. the resistivity|
|Weldability||Welding is not performed.|
|Machinability||Machinability similar to steel grades 12Х18Н12Т and 08KH18N12T.|
|Macrostructure and pollution||Macrostructure of steel bars on the other 14-1-784-73 should not have shrinkage, bubbles, cracks, inclusions, visible without using the magnifying devices.|
|Corrosion resistance||Steel are prone to intergranular corrosion after provoking heating.|