a low-carbon stainless steel with excellent toughness and improved composition. After electroslag remelting (ESR) treatment, it is a corrosion-resistant steel with extremely high purity and can meet high mirror polishing. Good dimensional stability during heat treatment , good hardenability; after heat treatment, the high hardness state has excellent mirror polishing effect, good wear resistance and much higher toughness than the conventional 1.2083 series; widely used in 3C electronic plastic molds such as mobile phones and laptops, as well as household appliances, automobiles and other high mirror polished, transparent parts, black high-gloss appearance parts, plastic molds that require mirror polishing; especially suitable for the use of conventional 1.2083 series materials for complex structure molds with high risk of cracking.