Steel A30
Description
Steel A30
Steel A30: a 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 A30.
General information of A30 steel
| Substitute brand |
| steel A40, A40G |
| Delivery type |
| Long products, including shaped: GOST 1414−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 1414−75, GOST 7417−75, GOST 8559−75, GOST 8560−78. Polished bar and silver bar GOST 1414−75, GOST 14955−77. |
| Application |
| Parts of complex shape, machined on automatic machines, and parts to which increased requirements for surface quality are imposed, operating at high stresses and pressures (axles, forks, bushings, rings, gears, pins, screws, bolts, nuts). |
Chemical composition of steel A30
| Chemical element |
% |
| Silicon (Si) |
0.15−0.35 |
| Manganese (Mn) |
0.70−1.00 |
| Sulfur (S) |
0.08−0.15 |
| Carbon (C) |
0.27−0.35 |
| Phosphorus (P), no more |
0.06 |
Mechanical properties of steel A30
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
σ B, MPa |
δ 5 ,% |
ψ,% |
HB |
| Hot rolled steel |
100 |
510 |
fifteen |
25 |
185 |
| Calibrated work-hardened steel |
100 |
540 |
6 |
|
223 |
Technological properties of steel A30
| Forging temperature |
| The beginning is 1200, the end is 850. |
| Weldability |
| not applicable for welded structures |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| sensitive |
Temperature of critical points of steel A30
| Critical point |
° C |
| Ac1 |
735 |
| Ac3 |
845 |
| Ar3 |
820 |
| Ar1 |
680 |
