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Non-alloy steel quenchable and temperable in water with higher carbon contents than KV20. Used for simple pieces of limited size.
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10083-1: 1998 | (UNI 7845-78) | (DIN 17200-86) | (NF A 35-552-86) | (BS 970 pt.3-96) | ASTM A 29 | ||
| Grade | N° | Werkstoff | N° | ||||
| C30E | 1.1178 | C30 | Ck30 | 1.1178 | XC32 | 080A30 | 1030 |
| C30R | 1.1179 | Cm30 | 1.1179 | ||||
| EUROPE | C | Si | Mn | P/max | S | Cr/max | Mo/max | Ni/max | Cu/max | Pb |
|---|---|---|---|---|---|---|---|---|---|---|
| C30E | 0,27÷0,34 | 0,10÷0,40 | 0,50÷0,80 | 0,025 | ≤ 0,035 | 0,40 | 0,10 | 0,40 | 0,30 | - |
| C30R | 0,020÷0,040 | 0,020÷0,050 |
| 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 | it can be sheared without heat treatment | - | 400 | 600÷750 | 18 | - | 30 | 280 | 510 | 20 | ||
| 16<d≤40 | - | 350 | 550÷700 | 20 | 45 | 30 | 250 | 480 | 21 | |||
| 40<d≤100 | - | 300* | 500÷650* | 21 | 30 | 30 | 250 | 480 | 21 | |||
| 100<d≤160 | - | - | - | - | - | - | 230 | 460 | 21 | |||
| 160<d≤250 | - | - | - | - | - | - | 230 | 460 | 21 | |||
* Values valid for diameter up to 63 mm or thikness up to 35 mm
| 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 | - | - | - | - | - | - | 565 | 750÷900 | 9 | 455 | 610÷910 | 6 | |
| 10<d≤16 | - | - | - | - | - | - | 510 | 680÷850 | 9 | 420 | 570÷870 | 7 | |
| 16<d≤40 | 145÷198 | 480÷680 | 350 | 550÷750 | 20 | 40 | 460 | 640÷800 | 10 | 345 | 550÷850 | 8 | |
| 40<d≤63 | 145÷198 | 480÷680 | 300 | 500÷650 | 20 | 40 | 390 | 550÷690 | 11 | 300 | 520÷820 | 9 | |
| 63<d≤100 | 145÷198 | 480÷680 | 300 | 500÷650 | 20 | 40 | 310 | 500÷650 | 12 | 250 | 480÷780 | 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 | 870÷910 |
| Soft annealing | 650÷700 |
| Quenching in water | 850÷890 |
| Tempering | 550÷660 |
