Barrel construction can be done following samples or drawings in various materials: standard nitrided, hardened steel (for small dimension items), bimetallic, where there are materials with high abrasion and corrosion.
Main materials are:
- Nitrited steel (41CrAlMo7) 60 HRC
It is a steel, with aluminium, chrome, molybdenum which, during the heat treatment, create nitruri very strong, which rise hardness of 1050 HV approx.
This material is suggested where there are not problems of corrosion and wear.
- Hardened steel (X155CrMoV121) 58-60 HRC
It has a very high percentage of chrome, which gives a good strenght and long life.
This material is suggested where there are wear problems.
Life: 2-3 times standard nitrided
- Bimetallic (abrasive and corrosive plastics) 62-69 HRC
There is an internal layer of very hard material, with a thickness of 5mm approx, with a high resistance to corrosion and wear, with an hardness value up to 65 HRC.
This material is suggested where there are corrosion and wear problems.
Life: 4-5 times standard nitrided