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Cast iron KCH33-8

Cr30-6 cast iron Pig-iron КЧ33-8 Cr35-10 cast iron Cr37-12 cast iron Cr45-7 cast iron Cast iron КЧ50-5 Cast iron KCh55-4 Cr60-3 cast iron Cr65-3 cast iron Cr70-2 cast iron Cr80-1.5 cast iron Cast iron PM1.3

Designation

Name The value
Designation GOST Cyrillic КЧ33-8
Designation GOST Latin KCh33-8
Transliteration KCh33-8
The chemical elements -

Description

Cast iron KCH33−8 is used: for the manufacture of castings of parts operating at moderate static and dynamic loads; parts of valves and actuators to it.

Note

Malleable cast iron ferritic characterized by a ferritic or ferritic-pearlitic microstructure of the metallic base.

Standards

Name Code Standards
Castings of cast iron (gray and malleable cast iron) В81 GOST 1215-79, OST 24.207.01-90, OST 23.1.21-80
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 2.6-2.9 ≤0.2 ≤0.18 0.4-0.6 ≤0.08 1-1.6 The rest
Fe is the basis.
According to GOST 1215-79, the mass fraction of carbon and silicon should be within the range of 3.70-4.20%. The chemical composition is given for the method of melting in cupola.

Mechanical characteristics

σB, MPa d Brinell hardness number, MPa
Castings on OST 1 90077-72
≥323 ≥8 100-163

Description mechanical marks

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

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