Accompanying element
An accompanying element is an admixture element in an alloy that is not to be regarded as an alloying element and must not exceed a certain maximum content specified in the material standards and can have a negative effect on the steel properties even in extremely low concentrations due to the disadvantageous formation of the basic structure.
In contrast to the (micro) alloying element, it gets into the material unintentionally during the manufacturing process, for example when reducing ore, which contains certain accompanying minerals.
Carbon is not seen as an alloying element in steel, but as an accompanying element. Steels with more than 1% carbon content can be called "unalloyed".
Important accompanying elements
| group | Accompanying element |
|---|---|
| elements | Sulfur , phosphorus , nitrogen , oxygen , hydrogen |
| Semi-metals | Boron , antimony , arsenic |
| Metals | Copper , tin , chromium , nickel , molybdenum |
Individual evidence
- ^ Stephan Hasse: Giesserei Lexikon, edition 18., Verlag Schiele & Schön, 2001, ISBN 3-7949-0655-1 , s. 136
- ↑ H. Rösner: Influence of the metallic accompanying elements brought in via the scrap from old car recycling and from military scrap on the steel properties , Steel Research, 1996, ISBN 92-827-6456-7 , p. 9
- ↑ Jürgen Gobrecht: Material Technology - Metals , Oldenbourg Wissenschaftsverlag, 2006, ISBN 978-3-486-57903-1 , p. 76