What is the origin of the RoHS Directive?
In February 2003 the European Union established Directive 2002/95 / EC to restrict the use of certain Hazardous Substances in Electrical and Electronic Equipment (EEE).
RoHS stands for Restriction of Hazardous Substances.
This legislation has been in force since 1st July 2006.
Restricted substances under the RoHS Directive
This directive restricts the use of the following substances:
- Chromium VI (also known as hexavalent chromium)
- PBB (Polybrominated biphenyls)
- PBDE (Polybrominated diphenyl ethers)
PBBs and PBDEs are flame retardants, used in the manufacture of some plastics.
Concentrations allowed in the RoHS Directive
The maximum permissible concentrations for each of the substances are:
- 0.1% for lead, mercury, chromium VI, PBB and PBDE of the weight of homogeneous materials
- 0.01% for cadmium of the homogeneous material weight.
The limits do not apply to the weight of the final product, or of the component, but apply to each substance that can be mechanically separated, such as the insulation of a cable.
In the following link you can consult the registered substances: http://eur-lex.europa.eu/legal-content/En/TXT/PDF/?uri=CELEX:32015L0863
What is the role of Steel in RoHS?
Historically both lead and chromium have been part of the chemical composition of some qualities of steel.
Currently, chromium VI is considered to be eradicated in the manufacture of steel. Some qualities of easy machining steel incorporate lead.
In the following link, you can download the RoHS declaration of AUSA Special Steels: https://www.ausasteel.com/en/certificado-rohs/