Case-hardening steels
Case-hardening steels are employed for the fabrication of mechanical parts that have to be hardened through heat treatments of carboncementation, carbonitriding, followed by quenching and tempering, so that you can obtain a hard surface, characterized by toughness and resistance at heart.
CASE-HARDENING STEELS (EN 10084)
| QUALITY | SURFACE CONDITION | Ø DIAMETER (mm) |
|---|---|---|
| 16MnCr5 (+A) Machinable Annealed | rolled drawn / peeled h11 |
20-210 18-80 |
| 16MnCr5 (+A) Machinable Annealed High Machinability | rolled peeled h11 |
20-80 19-78 |
| 20MnCr5 (+A) Machinable Annealed | rolled forged turned drawn / peeled h11 |
20-300 310-500 16-80 |
| 20MnCrS5 (+I) Isothermal Annealed | rolled | 40-170 |
| 20MnCr5 (+A) Machinable Annealed High Machinability | rolled peeled h11 |
20-80 19-78 |
| 16NiCr4 Machinable Annealed | rolled drawn / peeled h11 |
20-260 16-80 |
| 16NiCr4 (+A) Machinable Annealed High Machinability | rolled peeled h11 |
20-80 19-78 |
| 16NiCr4+Pb (+A) Machinable Annealed | rolled drawn / peeled h11 |
24-160 5-100 |
| 17NiCrMoS6-4 (+A) Machinable Anneled | rolled forged turned drawn / peeled h11 |
20-320 330-1200 20-80 |
| 17NiCrMoS6-4 +I (Isothermal Annealed) | rolled | 90-170 |
| 17NiCrMoS6-4 (+A) Machinable Annealed High Machinability | rolled peeled h11 |
20-80 19-78 |
| 17NiCrMoS6-4+Pb (+A) Machinable Annealed | rolled drawn / peeled h11 |
20-200 5-100 |
| 16NiCrMo12 (+A) Annealed | rolled | 20-250 |
| 18CrNiMo7-6 (+A) Machinable Annealed | rolled reeled forged turned |
40-220 230-490 |
| ZF1A (18CrNiMo7-6~) Annealed | rolled reeled forged turned |
40-220 230-490 |
Not only an excellent resistance at heart, but also a high mechanical wear resistance is obtained.
To obtain elevated toughness, steels with a high percentage of nickel will be preferred.
Case-hardening steels are employed to build gears, shafts, linchpins, mechanical parts for the adaptors sector, industrial, automotive and mechanical parts in general.
The eligibility of the case-hardening treatment depends on the steel's quality, on the austenitic grain size that is formed during the treatment and on the percentage of carbon and alloy elements, which change for each quality.