<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31457282</termId><termName>carbon steel</termName><termType>PT</termType><termNote><![CDATA[ Steel that does not have specified minimum content levels of alloying elements. The term can also refer to steel that does not have more than 0.40% copper or to steel that has maximum content levels of the following: manganese 1.65%, silicon 0.60%, and copper 0.60%. ]]></termNote><termCreatedDate>2026-03-30 21:03:05</termCreatedDate><relation><relationType>UF</relationType><termId>31457283</termId><termName>carbon steels</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457284</termId><termName>ordinary steel</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457285</termId><termName>ordinary steels</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457286</termId><termName>plain carbon steel</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457287</termId><termName>plain carbon steels</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457288</termId><termName>steel, carbon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457289</termId><termName>steels, carbon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457290</termId><termName>steels, ordinary</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457291</termId><termName>steels, plain carbon</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457292</termId><termName>straight carbon steel</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31457293</termId><termName>straight carbon steels</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31438469</termId><termName>steel</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31471166</termId><termName>low-carbon steel</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31471174</termId><termName>medium-carbon steel</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31471177</termId><termName>high-carbon steel</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31471179</termId><termName>blister steel</termName><termType>PT</termType></relation></term>  </Zthes>