<https://dl.asminternational.org/alloy-digest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://dl.asminternational.org/alloy-digest/article-abstract/35/7/SA-420/5026/SAE-4145Oil-Hardening-Alloy-Steel?redirectedFrom=fulltext>