Cast iron KCH55-4
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 | 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.
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 |
