LKM - Steel Chart
LKM Plastic Mould Steel
Material Grade Hardness Characteristics Applications
LKM P20M Prehardened to HB260 - 350 Economical choice of pre-hardened plastic mould steel Mould base/plate with high strength requirement for plastic injection mould; core/movable part of plastic injection mould without high surface finish requirement
LKM 2311 Prehardened to HB280 - 325 Pre-hardened plastic mould steel Mould base/plate with high strength requirement for plastic injection mould; core/movable part of plastic injection mould without high surface finish requirement
LKM 2312 Prehardened to HB280 - 325 Excellent machinability Mould base/plate with requirement of high strength and high volume/speed machining for plastic injection mould
LKM 738 Prehardened to HB290 - 330 Modified version of conventional AISI P20 plastic mould steel with Ni added to increase through hardening property Plastic injection mould for medium production run and PS, PE, PP, ABS and other non-corrosive resins
LKM 738H Prehardened to HB330 - 370
LKM 738MHESR Prehardened to HB341-400 Uniform hardness ;Good polishability(SPIA1) and texturability;Improved weldability compared with 1.2738;Better thermal conductivity Large plastic mould with high surface requirement ;Moulds for automobile headlamps, rearview mirror, lanterns and interior decoration;Moulds for TV and copier housings
LKM 738MHH Prehardened to HB341-400 Uniform hardness ;Good texturability;Improved weldability compared with 1.2738;Better thermal conductivity Large plastic mould with high photo-etching requirement ;Moulds for dashboard and large outer body parts;Moulds for TV and copier housing
LKM 838HS Prehardened to HB330 - 380 With special adjustment to the chemical composition and steel making process, LKM838HS possesses better polishability, EDM and texturing properties, weldability, thermal conductivity than conventional W.Nr 1.2738HH plastic mould steel Plastic injection mould for medium production run with good texturing property, e.g. car bumper, dashboard and housings for photocopier and printer; not suitable for moulding corrosive resins
LKM 2711 Prehardened to HB315 - 385 Combining high yield strength and good toughness; suitable for nitriding Plastic injection mould for medium production run and PS, PE, PP, ABS and other non-corrosive resins
LKM 808ESR Prehardened to HB360 - 415 Age hardening steel with high delivery hardness, good polishability and texturing property Plastic injection mould for medium production run with simple geometry design; not suitable for moulding corrosive resins
LKM 2083 Annealed to HB240(max) Working in through hardening condition with good corrosion resistance, wear resistance and polishability Plastic injection mould for moulding resins such as PA, POM and flame retarding additives and long production run
LKM 2083H Prehardened to HB280 - 320 Pre-hardened corrosion stainless steel Plastic injection mould for moulding resins such as PA, POM and flame retarding additives and medium production run
LKM 2083 ESR Annealed to HB250(max) Good corrosion resistance, high werar resistance, better mirror polishabilitythan SWG 2083 Plastic injection mould for PVC, PP, EP, PC, PMMA with long production run and requiring high surface finish
LKM 2316 Annealed to HB250(max) Working hardness can be attained to HRC44-47. Excellent corrosion resistance Plastic injection mould for PVC and other high corrosive resins with requirement of long production run; components for injection moulding machine and machine part for food processing machinery
LKM 2316H Prehardened to HB265 - 340 Pre-hardened high corrosion resistance steel Plastic injection mould for PVC and other high corrosive resins with requirement of medium production run; components for injection moulding machine and machine part for food processing machinery
LKM 2085 Prehardened to HB280 - 330 Superior machinability, good corrosion resistance. Suitable for mould bases of plastic moulds with requirement of long run, corrosion resistance and high precision; also suitable for plastic and rubber moulds, machine parts with low requirement on polishability and texturing.

LKM Hot Work Steel

Material Grade Hardness Characteristics Applications
LKM 2343 Annealed to HB229(max) High toughness and good heat resistance; good resistance to heat checking and good through hardening property Light-alloy die casting die, Al alloy extrusion die, components for die casting, e.g. nozzles; through-hardened plastic injection mould for non-corrosive resins
LKM 2343 ESR Annealed to HB229(max) Homogenous structure and good isotropic property. High toughness and good heat resistance, good resistance to heat checking, excellent through hardening property and mirror polishability Light-alloy die casting die, Al alloy extrusion die, components for die casting, e.g. nozzles; through-hardened plastic injection mould for non-corrosive resins with high surface finish requirement
LKM 2344 Annealed to HB225(max) High toughness and good heat resistance, good resistance to heat checking and through hardening property Light-alloy die casting die, Al alloy extrusion die, components for die casting, e.g. nozzles; through-hardened plastic injection mould for non-corrosive resins
LKM 2344 ESR Annealed to HB225(max) Homogenous structure and good isotropic property. High toughness and good heat resistance, good resistance to heat checking, excellent through hardening property and mirror polishability Light-alloy die casting die, Al alloy extrusion die, components for die casting, e.g. nozzles; through-hardened plastic injection mould for non-corrosive resins with high surface finish requirement

LKM Cold Work Steel

Material Grade Hardness Characteristics Applications
LKM 2767 Annealed to HB262(max) Working in through hardening condition with high toughness Small to medium size of through-hardened plastic injection mould with complicated structure; dies for shearing and blanking of sheet metal with 10mm thick or above