... ,SKD61,45#steel,etc. Heat treatmentHardened, Nitriding HardnessHRC50~55 Mould featuresAdvanced design, Logical structure, High precision, Qualified materials, ... Long lifetime, Short delivery time.Die casting productMaterialAluminum alloy,A360, A380, A383, AlSi10Mg, AlSi9Cu3, ... customers! Welcome to visit our company! Aluminium Die Casting Parts for Sewing Machine