Cast iron VCH70
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ВЧ70 |
| Designation GOST Latin |
BCh70 |
| Transliteration |
VCh70 |
| The chemical elements |
- |
Description
Cast iron VCH70 used: for the manufacture of products with high strength and satisfactory ductility.
Standards
| Name |
Code |
Standards |
| Cast iron |
В11 |
GOST 7293-85 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 7293-85 |
3.2-3.6 |
≤0.015 |
≤0.1 |
0.4-0.7 |
≤0.15 |
2.6-2.9 |
≤0.6 |
The rest |
≤0.4 |
Fe is the basis.
According to GOST 7293-85 the chemical composition is given for castings with wall thickness up to 50 mm inclusive. For castings with a wall thickness exceeding 50 to 100 mm, the recommended content is C = 3.00-3.30%, Si = 2.60-2.90%.
Mechanical characteristics
| sT|s0,2, MPa |
σB, MPa |
d |
Brinell hardness number, MPa |
| Castings on OST 1 90077-72 |
| ≥420 |
≥700 |
≥2 |
228-302 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
