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Cast iron KCH55-4

Designation

Name The value
Designation GOST Cyrillic КЧ55-4
Designation GOST Latin KCh55-4
Transliteration KCh55-4
The chemical elements -

Description

Cast iron KCH55−4 is used: for the manufacture of castings of machine parts that require high strength and ductility.

Note

Malleable cast iron pearlitic class, characterized by a mainly pearlitic microstructure of the metallic base.

Standards

Name Code Standards
Castings of cast iron (gray and malleable cast iron) В81 GOST 1215-79
Pipes from ferrous metals and alloys cast and connecting parts to them В61 GOST 8943-75, GOST 8944-75, GOST 8946-75, GOST 8947-75, GOST 8948-75, GOST 8949-75, GOST 8950-75, GOST 8951-75, GOST 8952-75, GOST 8953-75, GOST 8954-75, GOST 8955-75, GOST 8956-75, GOST 8957-75, GOST 8958-75, GOST 8959-75, GOST 8960-75, GOST 8961-75, GOST 8962-75, GOST 8963-75

Chemical composition

Standard C S P Mn Cr Si Fe
GOST 1215-79 2.5-2.8 ≤0.2 ≤0.1 0.3-1 ≤0.08 1.1-1.3 The rest
Fe is the basis.
According to GOST 1215-79, the mass fraction of carbon and silicon should be within the range of 3.60-3.90%. The chemical composition is given for the method of melting cupola-electric furnace.

Mechanical characteristics

σB, MPa d Brinell hardness number, MPa
Castings on OST 1 90077-72
≥539 ≥4 192-241

Description mechanical marks

Name Description
σB Limit short-term strength
d Elongation after rupture

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