Steel A40G
Description
Steel A40G
Steel A40G: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel A40G.
General information of steel A40G
| Delivery type |
| Circle st a40g, long products, including shaped: GOST 1414−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 1414−75, GOST 8559−75, GOST 8560−78, GOST 7417−75. Polished bar and silver bar GOST 1414−75, GOST 14955−77. |
| Application |
| Parts of a complex shape, machined on automatic machines, and parts that are subject to increased requirements for surface cleanliness, operating at increased stresses and pressures: axles, rollers, bushings, rings, gears, pins, screws, bolts, nuts, lead screws. |
Chemical composition of steel A40G
| Chemical element |
% |
| Silicon (Si) |
0.15−0.35 |
| Manganese (Mn) |
1.20−1.55 |
| Sulfur (S) |
0.18−0.30 |
| Carbon (C) |
0.37−0.45 |
| Phosphorus (P), no more |
0.05 |
Mechanical properties of steel A40G
Mechanical properties at 20 C
| Heat treatment, delivery condition |
Section, mm |
σ B, MPa |
δ 5 ,% |
ψ,% |
HB |
| Hot rolled bar without heat treatment |
100 |
590 |
fourteen |
20 |
207 |
| Calibrated high-tempered or annealed bar |
100 |
590 |
17 |
|
229 |
Technological properties of steel A40G
| Forging temperature |
| Beginning 1100, end 800. |
| Tendency to release ability |
| inclined. |
| Flock sensitivity |
| sensitive |
Temperature of critical points of steel A40G
| Critical point |
° C |
| Ac1 |
730 |
| Ac3 |
830 |
