Steel adjusted to the parts exposed on heavy loadings and more resistant to abrasion. Such as: wheels, rims, toothed shafts, cylinders, shafts, axles, pins, eccentrics;
After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.
After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.
| C | Mn | Si | P | S | Cr | Ni | Mo | V | W | Ti | Cu | Inne |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0,57 - 0,65 | 0,60 - 0,90 | Max 0,40 | Max 0,045 | Max 0,045 | Max 0,40 | Max 0,40 | Max 0,10 | - | - | - | - | Cr+Mo+Ni max 0,63 |
| Effect of the cross-section on mechanical properties | |||
| If heat treated | |||
|
Diameter d, mm
Thickness of the flat bar t, mm |
≤ 16
≤ 8 |
16 - 40
8 - 20 |
40 - 100
20 - 60 |
| Ultimate tensile strength, R m , MPa | 850 - 1000 | 800 - 950 | 750 - 900 |
| Yield stress R e (R p0.2 ), MPa | ≥ 580 | ≥ 520 | ≥ 450 |
| Elongation, A, % | ≥ 11 | ≥ 13 | ≥ 14 |
| Reduction of area, Z, % | ≥ 25 | ≥ 30 | ≥ 35 |
| If normalised | |||
|
Diameter, d, mm
Thickness of the flat bar t, mm |
≤ 16
≤ 16 |
16 - 100
16 - 100 |
100 - 250
100 - 250 |
| Ultimate tensile strength, R m , MPa | ≥ 710 | ≥ 670 | ≥ 650 |
| Yield stress R e (R p0.2 ), MPa | ≥ 380 | ≥ 340 | ≥ 310 |
| Elongation, A, % | ≥ 10 | ≥ 11 | ≥ 11 |
| Technological treatment processes | Possible application | Temperature, °C | ||
| Hot forming | Forging | + | (1050 - 850) | |
| Rolling | + | (1050 - 850) | ||
| Treatment | Heat treatment | Quenching | + | 810-850/w,o |
| Tempering | + | 550 - 660 | ||
| Precipitation strengthening | Supersaturation | - | - | |
| Ageing | - | - | ||
| Annealing | Normalising | + | 820 - 880 | |
| Soft annealing | + | (650 - 700) | ||
| Thermochemical treatment | Carburising | - | - | |
| Other | - | - | ||
| ISO | European Union | Russia | |||
| ~C60 | ISO 683-1 1987 | C60 | EN 10083-2 1996 | ~60 | GOST 1050 1988 |
| US | Japan | China | |||
| ~M 1060 | ASTM A 29-93 | ~S 60 C | JIS G 4051 1979 | ~60 | GB 699-88 |