Steel A40G
Designation
| Name |
The value |
| Designation GOST Cyrillic |
А40Г |
| Designation GOST Latin |
A40G |
| Transliteration |
A40G |
| The chemical elements |
- |
Description
Steel A40G is used: for the manufacture of parts of complex shape, obrabatyvatsya on machines, and parts, which are increased requirements to the surface finish running at higher voltages and pressures (axles, rollers, bushings, rings, gears, fingers, screws, bolts, nuts, lead screws).
Note
Serotonergically steel high machinability.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
GOST 1414-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88 |
| Sectional and shaped rolling |
В22 |
GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 1414-75 |
0.37-0.45 |
0.18-0.3 |
≤0.05 |
1.2-1.55 |
≤0.25 |
0.15-0.35 |
≤0.25 |
The rest |
≤0.25 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
y, % |
Brinell hardness number, MPa |
| The hot rolled, without heat treatment |
|
≥590 |
≥14 |
≥20 |
≤207 |
| Rolled calibrated. High tempering (annealing) |
|
≥590 |
≥17 |
- |
≤229 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
Technological properties
| Name |
The value |
| Propensity to temper brittleness |
inclined |
| Forging temperature |
Start - 1100 °C, the end - of 800 °C. |
| Flock-sensitive sensitivity |
sensitive |
