Cast iron CHVG30
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ЧВГ30 |
| Designation GOST Latin |
ChBG30 |
| Transliteration |
ChVG30 |
| The chemical elements |
- |
Description
Cast iron CHVG30 used: for the manufacture of parts for General machine building (instead of grey cast iron) working at high cyclic mechanical loads; parts of internal combustion engines that operate at variable elevated temperatures and mechanical loads; basic parts of machine tools, forging and pressing equipment, basic parts; parts for tractors makepreview; supporting components; cylinder heads; fasteners frames; retaining rings; gears of automobiles increased payload; brake levers for tractors; brake mounting brackets; fan cushions; connecting flanges; covers gear boxes; housings, covers and cylinder heads; housings of turbochargers; exhaust nozzles; wheel hubs; levers; V-shaped blocks 12-cylinder engines and blocks 6-cylinder engines; cap and cylinder heads and high-power marine diesel engines; brake discs for high speed trains; buildings exhaust valves; casings of gas turbines and compressors; molds, pallets, permanent mold and other tooling.
Standards
| Name |
Code |
Standards |
| Cast iron |
В11 |
GOST 28394-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Mg |
| GOST 28394-89 |
3.5-3.8 |
≤0.025 |
≤0.08 |
0.2-0.6 |
≤0.15 |
2.2-3 |
The rest |
0.015-0.028 |
Fe is the basis.
According to GOST 28394-89 the chemical composition is given for cast iron of grade </s>VG30. The residual content of the sum of rare-earth elements (REM) in cast iron should be in the range of 0.10-0.20%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d |
Brinell hardness number, MPa |
| Cast iron in the cast state or after heat treatment in the state of delivery according to GOST 28394-89 |
|
≥240 |
≥300 |
≥3 |
130-180 |
| Given the influence of the wall thickness of the casting on the mechanical properties of CGI according to GOST 28394-89 |
| 10 |
- |
≥450 |
≥3.8 |
≥190 |
| 100 |
- |
≥350 |
≥2.5 |
≥160 |
| 20 |
- |
≥420 |
≥3.5 |
≥180 |
| 30 |
- |
≥400 |
≥3 |
≥170 |
| 50 |
- |
≥380 |
≥2.8 |
≥160 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| 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 |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
a, 10-6 1/°С |
| 20 |
130-140 |
7000 |
49-51 |
- |
| 100 |
- |
- |
- |
12-14 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| С |
Specific heat |
