Cast iron CHH28

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    • Designation

    Name The value
    Designation GOST Cyrillic ЧХ28
    Designation GOST Latin ChX28
    Transliteration ChH28
    By chemical elements ZrCr28

    Description

    Cast iron CHH28 used: for the manufacture of parts with high corrosion resistance in solutions of acids, alkalis and salts, in gases containing sulfur or carbon dioxide and parts with high abrasive wear resistance (parts that operate at low mechanical loads in the environment of SO2 and SO3 in alkalis high concentration of nitric acid solutions and molten salts at temperatures up to 1000 °C; the details of centrifugal pumps, furnace fittings, retort for carburizing, nozzles, cylinders, casing spools, strokes furnaces pyrites; nozzles for sand-blasting machines and other parts exposed to abrasion, parts of food equipment, provodkoy fittings light mills).

    Note

    Chromium corrosion and heat-resistant (up to 1100−1300 °C) high-alloyed cast iron.

    Standards

    Name Code Standards
    Castings with special properties (iron and steel) В83 GOST 7769-82

    Chemical composition

    Standard C S P Mn Cr Si Fe
    GOST 7769-82 0.5-1.6 ≤0.08 ≤0.1 ≤1 25-30 0.5-1.5 Rest
    Fe is the basis.
    According to GOST 7769-82, nickel content is allowed up to 1.0% or copper up to 1.50%, introduced by natural alloyed iron, alloyed with steel scrap or magnesium-containing ligature.

    Mechanical properties

    σU, MPa HB, MPa
    Castings on OST 1 90077-72
    ≥370 215-270

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    HB Brinell hardness number