我公司主要从事钢铁材料、批发与零售及配送企业，现进口的材料有1000多种。如美国，瑞典,中国的碳素钢大至如下：1、美国：100510061008101010111012101310151016101710181019102010211022102310251029103010341035103710381039G10050G10060G10080G10100G10120G10130G10150G10160G10170G10180G10190G10210G10220G10230G10250G10260G10290G10300G10350G10370G10380G10390G10400G10420G104302、瑞典：121112251226123212331234125012651300131013111312131313301331133213501357137014101400141214131414142114221423142414301431143214341435145015001510155015551572)