高品質炭素構造鋼と炭素構造鋼の違い
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高品質な炭素構造鋼（例：08F）と炭素構造鋼（例：Q235AF）の材質表示方法は異なりますが、なぜ区別するのでしょうか？それぞれの用途は何ですか？材質番号の表記方法は、GB/T 221-2008 鋼鉄製品の材質番号表記方法に準ずる
この基準がないので、これら2つの基準を見て比較してみませんか？ GBT 700-2006 炭素構造鋼. GBT 699-1999 高品質炭素構造鋼
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