Boron (B): Boron steel can be improved by adding small amounts of dense and hot-rolled steel performance, increase strength.

China Tool steelfactory|mold steel supplier|Special steel
press forged mold steel|hammer forged tool steel|ESR forged steel|
H13|1.2367|1.2365|1.2343|H11|SKD61|1.2344| D2|1.2085|SKD11|1.2436|1.2316|1.2085
QT hardness, quenched and tempered|flat bar| round bar|forged steel
bar|pre-heardened plastic mould steel.