A.表示碳的質(zhì)量分?jǐn)?shù)為0.2%,鉻的質(zhì)量分?jǐn)?shù)為13%的高合金鋼 B.表示碳的質(zhì)量分?jǐn)?shù)為0.02%,鉻的質(zhì)量分?jǐn)?shù)為13%的高合金鋼 C.表示碳的質(zhì)量分?jǐn)?shù)為0.2%,鉻的質(zhì)量分?jǐn)?shù)為1.3%的高合金鋼 D.表示碳的質(zhì)量分?jǐn)?shù)為2%,鉻的質(zhì)量分?jǐn)?shù)為1.3%的高合金鋼
A.5%~10% B.<5% C.>10% D.0.30%~0.60%
A.碳的質(zhì)量分?jǐn)?shù)為0.12%的碳素工具鋼 B.碳的質(zhì)量分?jǐn)?shù)為1.2%的合金工具鋼 C.碳的質(zhì)量分?jǐn)?shù)為0.12%的合金工具鋼 D.碳的質(zhì)量分?jǐn)?shù)為1.2%的碳素工具鋼