<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31478158</termId><termName>Cor-Ten steel (TM)</termName><termType>PT</termType><termNote><![CDATA[ A weathering steel that has superior corrosion resistance over regular carbon steel because of a protective oxide film on the metal's surface. Its 50,000 minimum yield strength allows for cost reduction because lighter sections can be designed and built into structures; it is generally meant to be used in unpainted applications where a reduction in maintenance costs, such as painting, are desired. Cor-Ten is a brand name for corrosion resistant products that were developed by United States Steel; Cor-Ten has subsequently been licensed to be produced by other steel manufacturers. ]]></termNote><termCreatedDate>2026-03-30 21:08:45</termCreatedDate><relation><relationType>UF</relationType><termId>31478159</termId><termName>Cor-Ten steel</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478160</termId><termName>steel, Cor-Ten (TM)</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478161</termId><termName>weathering steel</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31471190</termId><termName>high-strength low-alloy steel</termName><termType>PT</termType></relation></term>  </Zthes>