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Okey
Non-alloy steel quenchable and temperable in oil, with high carbon levels, allows pieces with rather high hardness to be obtained. Also suitable for surface tempering.
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10083-2: 2006 EN 10277-5: 2008 |
(UNI 7845-78) | (DIN 17200-86) | (NF A 35-552-86) | (BS 970 pt.3-96) | ASTM A 29 | ||
| Grade | N° | Werkstoff | N° | ||||
| C50E | 1.1206 | C50 | Ck50 | 1.1206 | - | 080M50 | 1050 |
| C5ORPb | 1.0542 | C50 | Ck50 | 1.0542 | - | 080M50 LEADED | 10L50 |
| EUROPE | C | Si | Mn | P/max | S | Cr/max | Mo/max | Ni/max | Cu/max | Al | Pb |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C50E | 0,47÷0,55 | 0,10÷0,40 | 0,60÷0,90 | 0,025 | ≤ 0,035 | 0,40 | 0,10 | 0,40 | 0,30 | - | - |
| C5ORPb | 0,020÷0,040 | - | 0,015÷0,030 |
| Size (mm) |
HB max to condition | Quenched and tempered (+QT) | Normalized (+N) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Treated to improve shearability (+S) | Soft annealing (+A) | Rp0,2 (MPa) min | Rm (MPa) min | A5 (%) min | Z (%) min | KV (J) min | Rp0,2 (MPa) min | Rm (MPa) min | A5 (%) min | |||
| d≤16 | 255 | 217 | 520 | 750÷900 | 13 | 30 | - | 355 | 650 | 12 | ||
| 16<d≤40 | 255 | 217 | 460 | 700÷850 | 15 | 35 | - | 320 | 610 | 14 | ||
| 40<d≤100 | 255 | 217 | 400 | 650÷800 | 16 | 40 | - | 320 | 610 | 14 | ||
| 100<d≤160 | 255 | 217 | - | - | - | - | - | 290 | 590 | 14 | ||
| 160<d≤250 | 255 | 217 | - | - | - | - | - | 290 | 590 | 14 | ||
| Size (mm) |
Rolled+Turned (+SH) | Quenched+Tempered+Turned (+QT +SH)* | Quenched+Tempered+Cold Drawn (+QT +C) | Cold Drawn (+C) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hardness HB | Rm (MPa) | Rp0,2 (MPa) min | Rm (MPa) min | A5 (%) min | KV (J) min | Rp0,2 (MPa) min | Rm (MPa) | A5 (%) min | Rp0,2 (MPa) min |
Rm (MPa) | A5 (%) min | ||
| 5≤d≤10 | - | - | - | - | - | - | 610 | 870÷1070 | 7 | 590 | 770÷1100 | 5 | |
| 10<d≤16 | - | - | - | - | - | - | 580 | 830÷1030 | 7 | 520 | 730÷1080 | 6 | |
| 16<d≤40 | 179÷269 | 610÷910 | 460 | 700÷850 | 15 | - | 555 | 790÷990 | 8 | 440 | 690÷1050 | 7 | |
| 40<d≤63 | 179÷269 | 610÷910 | 400 | 650÷800 | 16 | - | 510 | 730÷930 | 9 | 390 | 650÷1030 | 8 | |
| 63<d≤100 | 179÷269 | 610÷910 | 400 | 650÷800 | 16 | - | 475 | 680÷880 | 9 | - | - | - | |
*This values are valid also for Cold Drawn - Quenched + Tempered Condition (+C +QT)
For size <5 mm the mechanical properties may be agreed at the time of enquiry and order
| Operation | °C |
|---|---|
| Hot forgings deformation | 850÷1150 |
| Normalizing | 830÷870 |
| Soft annealing | 650÷700 |
| Quenching in oil | 810÷850 |
| Tempering | 550÷660 |
| Limits of range | Hardness HRC at a distance from quenched end of test pieces (mm) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 15 | 20 | 25 | 30 | |||||||
| +H | Max | 63 | 62 | 61 | 60 | 58 | 55 | 50 | 43 | 36 | 35 | 34 | 33 | 32 | 31 | 29 | 28 | |||||
| Min | 56 | 53 | 44 | 34 | 31 | 30 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 20 | - | ||||||
