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Non-alloy steel quenchable and temperable in water, higher carbon content than the previous types. Widely used thanks to its slightly higher temperability.
| 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° | ||||
| C35E | 1.1181 | C35 | Ck35 | 1.1181 | - | - | 1035 |
| C35R | 1.1180 | Cm35 | 1.1180 | ||||
| EUROPE | C | Si | Mn | P/max | S | Cr/max | Mo/max | Ni/max | Cu/max | Al | Pb |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C35E | 0,32÷0,39 | 0,10÷0,40 | 0,50÷0,80 | 0,025 | ≤ 0,035 | 0,40 | 0,10 | 0,40 | 0,30 | - | - |
| C35R | 0,020÷0,040 | - | - | ||||||||
| C35RPb | 0,020÷0,040 | 0,020÷0,050 | 0,15÷0,30 |
| 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 | - | 430 | 630÷780 | 17 | 40 | 25 | 300 | 550 | 18 | ||
| 16<d≤40 | - | 380 | 600÷750 | 19 | 45 | 25 | 270 | 520 | 19 | |||
| 40<d≤100 | - | 320 | 550÷700 | 20 | 50 | 25 | 270 | 520 | 19 | |||
| 100<d≤160 | - | - | - | - | - | - | 245 | 500 | 19 | |||
| 160<d≤250 | - | - | - | - | - | - | 245 | 500 | 19 | |||
| 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 | - | - | - | - | - | - | 525 | 750÷950 | 9 | 510 | 650÷1000 | 6 | |
| 10<d≤16 | - | - | - | - | - | - | 490 | 700÷900 | 9 | 420 | 600÷950 | 7 | |
| 16<d≤40 | 156÷204 | 520÷700 | 370 | 600÷750 | 19 | 35 | 455 | 650÷850 | 10 | 320 | 580÷880 | 8 | |
| 40<d≤63 | 156÷204 | 520÷700 | 320 | 550÷700 | 20 | 35 | 400 | 570÷770 | 11 | 300 | 550÷840 | 9 | |
| 63<d≤100 | 156÷204 | 520÷700 | 320 | 550÷700 | 20 | 35 | 385 | 550÷750 | 12 | 270 | 520÷800 | 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 | 860÷900 |
| Soft annealing | 650÷700 |
| Quenching in water | 840÷880 |
| 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 | 58 | 57 | 55 | 53 | 49 | 41 | 34 | 31 | 28 | 27 | 26 | 25 | 24 | 23 | 20 | - | |||||
| Min | 48 | 40 | 33 | 24 | 22 | 20 | - | - | - | - | - | - | - | - | - | - | ||||||
