Cast iron Achs-2

  • Cast iron AChV-1
  • Cast iron AChV-2
  • Cast iron AChK-1
  • Cast iron AChK-2
  • Cast iron AChS-1
  • Cast iron AChS-2
  • Cast iron ASF-3
  • Cast iron AChS-4
  • Cast iron AChS-5
  • Cast iron AChS-6

    • Designation

    Name The value
    Designation GOST Cyrillic АЧС-2
    Designation GOST Latin AChC-2
    Transliteration AChS-2
    By chemical elements -

    Description

    Cast iron Achs-2 applies: for the production of acceptable castings with wall thickness 15 — 60 mm; parts operating friction (inserts, bushings, guides, etc.); details for work in a pair of shafts increased hardness heat-treated (tempered or normalized) while ensuring: increased clearance for 15−30% more than for the bronze bearing; careful installation and accurate pairing of the friction surfaces; a continuous, thorough lubrication; running at idle.

    Note

    Grey antifriction cast iron with lamellar graphite.

    Standards

    Name Code Standards
    Cast iron В11 GOST 1585-85, STP М319-95

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu Ti
    STP М319-95 3-3.8 ≤0.12 0.15-0.4 0.3-1 0.2-0.5 1.4-2.2 0.2-0.5 Rest 0.2-0.5 0.03-0.1
    Fe is the basis.

    Mechanical properties

    σU, MPa HB, MPa
    Castings in cast or heat treated condition for STP М319-95
    ≥200 180-229

    Description mechanical marks

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

    Technological properties

    Name The value
    Microstructure Perlite or pearlitic-ferritic. Graphite: a form - ПГф1, ПГф2, ПГф4, ВГф5; size - ПГД15 - ПГД180; distribution - ПГр1 - ПГр3. Perlite: footprint - P-П70; dispersion - ПД0,3 - ПД1,6. Fosfina the eutectic (nature of distribution) - ФЭр1, ФЭр2. Cementite is not allowed.
    Operating conditions The use of castings made of cast iron notificationname in friction requires careful installation, providing the pair of the friction surfaces and the absence of bias; continuous lubrication, permitting true and significant heating of the friction units; increase of the gap compared to the established bronze 15-30%, in the presence of significant heating osetreni in the work - up to 50%; running at idle and progressively higher loads. At a pressure of P≤10.0 MPa sliding speed V must be ≤0.3 m/s and the product P·V ≤ 2.5 MPa·m/s At a pressure of P≤0.1 MPa sliding speed V must be ≤3.0 m/s and the product P·V ≤ 0.3 MPa·m/s.