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\n AISI 431 / EN 1.4057 / 14Х17Н2\n
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\n AISI 431 steel belongs to ferritic-martensitic superalloys. The main advantages of this steel grade:\n
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\n high wear resistance;\n
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\n increased strength;\n
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\n Impact resistance;\n
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\n Resistance to aggressive acidic and alkaline environments.\n
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\n Features\n
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\n Rolled stainless steel of this grade retains its characteristics over a wide temperature range. This allows the use of these alloys in any climatic zone. The high content of alloying additives guarantees increased resistance to corrosion of all types.\n
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\n Steel of this grade is practically not subject to “metal fatigue”, which makes it possible to use it in structures with increased load parameters. The disadvantages include difficulties in welding: steel must be “prepared” for this procedure by heating it to 200-300 ° C and using special welding electrodes for ferritic-martensitic alloys.\n
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\n Application
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\n AISI 431 stainless steel products are used to solve a wide range of tasks. They are necessary for the production of elements of pumping units, for the manufacture of shafts, turbines, shut-off valves, ventilation systems, chimneys, and so on.\n
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\n Chemical composition of steel 1.4057\n
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\n C\n
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\n Cr\n
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\n Ni\n
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\n 0.12-0.22 \n
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\n 15.0-17.0 \n
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\n 1 ,5-2,5 \n
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\n Material mechanical properties 1.4057\n
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\n QT800 specification\n
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\n Properties\n
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\n Typical\n
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\n Specification\n
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\n Tensile strength Rm, MPa\n
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\n 820\n
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\n 800-950\n
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\n Yield strength Rp0,2, MPa\n
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\n 620\n
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\n 600\n
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\n Elongation, min\n
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\n 20\n
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\n 14\n
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\n Hardness, HB\n
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\n -\n
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\n 25
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