Stål: Forskelle mellem versioner

[[Rustfrit stål]] indeholder mindst 11% chrom, ofte kombineret med nikkel, for at modstå [[korrosion]]. Nogle rustfri ståltyper, f.eks. [[Ferrit (jern)|ferritiske]], er [[magnetisk]]e, mens andre, f.eks. [[austenit]]iske, er umagnetiske. Korrosions-afvisende stål forkortes CRES ''(corrosion-resistant steels)''.

 

<!--In 2016 a breakthrough in creating a strong light aluminium steel alloy which might be suitable in applications such as aircraft was announced by researchers at [[Pohang University of Science and Technology]]. Adding small amounts of nickel was found to result in precipitation as nano particles of brittle B2 [[intermetallic]] compounds which had previously resulted in weakness. The result was a cheap strong light steel alloy—nearly as strong as [[titanium]] at ten percent the cost<ref name=pm20150204>

{{cite news |last1=Herkewitz|first1=William |title=Scientists Invent a New Steel as Strong as Titanium ; South Korean researchers have solved a longstanding problem that stopped them from creating ultra-strong, lightweight aluminum-steel alloys |url=http://www.popularmechanics.com/technology/news/a13919/new-steel-alloy-titanium/?1443670416676=1 |work=Popular Mechanics |date=2015-02-04 }}</ref>—which is slated for trial production{{when|date=oktober 2015}} at industrial scale by [[POSCO]], a Korean steelmaker.<ref>{{cite news|title=Wings of steel: An alloy of iron and aluminium is as good as titanium, at a tenth of the cost|url=http://www.economist.com/news/science-and-technology/21642107-alloy-iron-and-aluminium-good-titanium-tenth|accessdate=5. februar 2015|work=The Economist|date=7. februar 2015|quote=E02715}}</ref><ref name=Nature02515>{{cite journal|author1=Sang-Heon Kim, Hansoo Kim & Nack J. Kim|title=Brittle intermetallic compound makes ultrastrong low-density steel with large ductility|journal=Nature|date=5. februar 2015|volume=518|issue=7537|pages=77–79|doi=10.1038/nature14144|pmid=25652998|url=http://www.nature.com/nature/journal/v518/n7537/full/nature14144.html|accessdate=5. februar 2015|publisher=Nature Publishing Group|quote=we show that an FeAl-type brittle but hard intermetallic compound (B2) can be effectively used as a strengthening second phase in high-aluminium low-density steel, while alleviating its harmful effect on ductility by controlling its morphology and dispersion.}}</ref>