TOUGHENING NON-ALLOY QUALITY STEEL
NORM: PN/EN 10083-2
APPLICATION:
Steel susceptible to the parts averagely exposed on loadings and more resistant to abrasion. Such as: wheels, rims, toothed shafts, cylinders, shafts, axles, pins, eccentrics; for springs lightly exposed on loadings, etc.
TECHNOLOGICAL INFORMATION:
After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.
SEMI-FINISHED PRODUCTS:
After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.
CHEMICAL COMPOSITION:
C | Mn | Si | P | S | Cr | Ni | Mo | V | W | Ti | Cu | Inne |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0,52 - 0,60 | 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 |
MECHANICAL PROPERTIES:
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 Rm, MPa | 800 – 950 | 750 – 900 | 700 – 850 |
Yield stress Re (Rp0.2), MPa | ≥ 550 | ≥ 490 | ≥ 420 |
Elongation, A, % | ≥ 12 | ≥ 14 | ≥ 15 |
Reduction of area, Z, % | ≥ 30 | ≥ 35 | ≥ 40 |
If normalised | |||
Diameter, d, mm
Thickness of the flat bar t, mm |
≤ 16
≤ 8 |
16 – 100
8 – 100 |
100 – 250
100 – 250 |
Ultimate tensile strength, Rm, MPa | ≥ 680 | ≥ 640 | ≥ 620 |
Yield stress Re (Rp0.2), MPa | ≥ 370 | ≥ 330 | ≥ 300 |
Elongation, A, % | ≥ 11 | ≥ 12 | ≥ 12 |
Technological treatment processes:
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 | + | 825 – 885 | |
Soft annealing | + | (650 – 700) | ||
Thermochemical treatment | Carburising | – | – | |
Other | – | – |
INTERNATIONAL STEEL GRADES:
ISO | EN | Russia | |||
~C55 | ISO 683-1 1987 | C55 | EN 10083-2 1996 | ~ 55 | GOST 1050 1988 |
US | Japan | China | |||
~ M 1055 | ASTM A 29-93 | ~S 55 C | JIS G 4051 1979 | ~ 55 | GB 699-88 |