CHROMED BARS
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CHROMED BARS STOCK FACILITY STEEL GRADES The standard stock of chromed bars consists of steel grades C45 or C45E or C45R and 20MnV6, in untreated delivery condition (+AR), and 42CrMo4 in quenched and tempered delivery condition (+QT). DELIVERY CONDITIONS The solid bars subjected to chroming process are available in different delivery conditions, in order to obtain specific properties: NORMALIZATION: heat treatment consisting in heating process followed by gradual cooling in controlled atmosphere. Thanks to this process, the steel structure becomes more “refined” and improves its impact properties (Perlitic structure). INDUCTION HARDENING: the surface of the steel bar is heated by electric induction followed by fast cooling. This process leads to a high surface hardness, but also to fragility and low impact values (Martensite surface structure). QUENCHING AND TEMPERING: quenching process followed by tempering. This process leads to a good hardness and resistance and it reduces its fragility in comparison to induction hardening (Sorbite structure).

SURFACE PROTECTIONS All chromed bars are individually protected from casual damages due to handling and/or crashes by an extruded polypropylene envelope, cardboard or other suitable covers. This allows to protect and keep intact the chromed surface during handling and storage. All supplies can be completed by mill test certificates type 3.1 according to EN 10204. Traceability is granted by labels or paint marking on the protective envelope. LENGTHS PACKAGING The material, both in random lengths and fixlengths, is supplied in bundles closed with iron straps (adding protective material) or...