

KeyLos® UP is a special and innovative pre-hardened steel with improved penetration hardening, machinability and polishability, obtained through a special ‘super clean’ manufacturing process, which allows high level of micro-cleanness. KeyLos® UP is the new steel grade coming from the long experience of Lucchini RS in the production of plastic moulds steel grades.
W. Nr. /
DIN designation: ≈40CrMnNiMo8.3.3
The brand name identifies the Lucchini RS product and the number evokes the Werkstoff classification or other means of reflecting the characteristics of use. KeyLos® UP in the pre-hardened condition is suitable for the following applications:
Plastic moulding:
• medium and big sized moulds for the automotive industry;
• moulds for food industry products;
• moulds for rubber pressing;
• pressure moulds (SMC, BMC);
• bolsters.
Extrusion:
• dies and gauges for PVC extrusion;
• mechanical parts for extrusion presses
