A more detailed look at some of our steel grades and their characteristics.
| Steel Grade |
Comparable Standard AISI / JIS |
Hardening | Delivery Hardness HRC |
Characteristics | Applications |
| ASSAB Steel | |||||
| IMPAX 718S |
P20 Modified | Prehardened | 31-36 | Pre-hardened type, high purity with isotropic microstructure contains 1.0% Ni |
High quality mold inserts, best suitable for plastic molding of PA,POM, PS, PE, PP, ABS. |
| IMPAX 718H |
Prehardened | 36-42 | |||
| EM38 | — | Prehardened | 38-44 | Good polishability, texturing, EDMing and machinability. Homogenous hardness |
Suitable for plastics injection mold, extrusion die and rubber mold |
| STAVAX S136 | 420, ESR | Through hardened | 50-52 | High purity, high polishability to mirror finish, with good corrosion resistance and low distortion after heat treatment. |
High quality mold inserts with mirror surface finish and good corrosion resistance, anti-corrosive cooling channel, best suitable for plastic molding of PVC, PP, EP,PC, PMMA, machine parts for food processing machinery. |
| STAVAX S136H | Prehardened | 31-36 | |||
| STAVAX S136 SUP | 420, ESR | Through Hardened | 50-52 | Corrosion resistance and toughness are better than S136 | Suitable for big plastic mold with high precision requirement |
| STAVAX S136H SUP | Prehardened | 31-36 | Corrosion resistance and toughness are better than S136H | ||
| POLMAX | 420 (ESR+VAR), Optical Grade | Through hardened | 50-52 | Ultra-high purity and extremely low segregation by double remelting process (ESR+VAR). Excellent polishability to attain optical requirement. Good corrosion resistance and low distortion after heat treatment |
High quality molds for Lens, Optical Products, compact discs and medical applications |
| CORRAX S336 | Special Precipitation Hardening Stainless Steel | Age Hardening | 32 | Excellent corrosion resistance, extremely good dimensional stability during ageing, good weldability |
Injection molds for corrosive plastics, rubber, medical and food industry and plastic parts with complicated design. |
| ELMAX | Special Powder Metal | Through Hardened | 50-52 | High wear resistance. High corrosion resistance. High compressive strength. Less distortion after heat treatment. |
Suitable for plastic molds with the requirement of both high corrosion resistance and wear resistance. Suitable for plastic molds for engineer plastics with additives such as glass fibers and/or fire retardent. molds for electronic encapsulation. Componen |
| 168 (Ramax S/Ramax 2) | 420+S | Prehardened | 36-41 | High machinability. High corrosion resistance | mold base with the requirement of high strength and corrosion resistance. Plastic molds with corrosion resistance but do not require high surface finish requirement. Suitable for fixtures in electronic industries. |
| ORVAR 8407 | H13, MICRODIZED + ESR | Through Hardened | 50-52 | Hot work tool steel with high toughness and good high temperature strength |
Die casting, extrusion, cold hobbing, mold for PA, POM,PS, PE, EP plastics |
| CALMAX 635 | High wear resistance multi-functional tool steel | Through Hardened | 50-52 | Extremely high toughness and high wear resistance, good hardenability and weldability, good flame and induction hardenability to HRC56-60, with harden layer up to 5mm thickness. |
High strength plastic mold and compacting die, suitableable for molding of fibre-reinforce plactics. |
| VANADIS 10 | High performance powder metallurgical cold work tool steel |
Through Hardened | 50-52 | Extremely high wear resistance, sufficient toughness with very high compressive strength and high dimensional stability during heat treatment. |
High speed stamping of E.I. core and lead frame. |
| SSAB Steel | |||||
| Toolox 33 | Prehardened | 30-36 | Suitable for tools and engineering components. It possesses good dimensional stability after machining |
High quality mold inserts, best suitable for plastic molding of PA,POM, PS, PE, PP, ABS. |
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| Toolox 44 | Prehardened | 44-50 | Suitable for tools and engineering components. It possesses good dimensional stability after machining |
The high steel cleanliness gives Toolox 44 very good polishing, A2 gloss, and texturing capabilities. | |
| DAIDO Steel | |||||
| PX88 | P20 Modified | Prehardened | 31-36 | Good weldability, special alloying composition to reduce sensitivity due to weld crack. |
Medium production run plastic mold with good surface finishing. |
| PX5 | P20 Modified | Prehardened | 31-36 | Good weldability, special alloying composition to reduce sensitivity due to weld crack, good machinability |
Medium production run plastic mold |
| NAK55 | P21+S Mod., ESR | Prehardened | 40-43 | Pre-hardened type with high hardness, good machinability and weldability |
High precision plastic molds and rubber molds. |
| NAK80 | P21 Mod., ESR | Prehardened | 40-43 | Pre-hardened type with high hardness, good polishability,excellent photo-etchingability, good EDM machining and weldability |
molds require high wear resistance and excellent surface finishing. |
| S-Star | SUS 420 J2 Mod., ESR | Prehardened | 31-36 | High mirror surface polishability with corrosion resistance. | High precision plastic molds with high mirror surface finishing. |
| S-Star (A) | SUS 420 J2 Mod., ESR | Through Hardened | 50-52 | High mirror surface polishability with corrosion resistance. Hardness can be obtained up to 50 – 52 HRC with proper heat treatment in order to obtain better polishability, wear resistance and/or corrosion resistance |
High precision plastic molds with high mirror surface finishing. |
| DH31-S | SKD61 Modified | Through Hardened | 50-52 | Good through-hardening properties especially for large molds, excellent resistance to thermal shock and to thermal fatigue, good resistance to heat erosion. | AL, Mg Die casting molds, Parts for die casting molds, AL die extrusion molds, Hard plastics molds. |
| DHA1 | SKD61 | Through Hardened | 50-52 | Good through-hardening properties, good resistance to thermal shock and thermal fatigue, good resistance to heat erosion. | Zn, small size AL die casting molds, Parts for die casting molds, AL die extrusion molds, Hard plastics molds. |
| GOA | SKS3 Modified | Through Hardened | 50-52 | High hardenability and wear resistance cold work tool steel | Punches for cold forming and blanking, shearing blades for metal sheet. |
| DC11 | SKD11 | Through Hardened | 50-52 | Excellent wear resistance with high chromium cold work tool steel |
Suitable for cold extrusion, cold drawn dies, punching and blanking dies for stainless steel or metal sheets with high hardness. |
| DC53 | SKD11 Modified | Through Hardened | 50-52 | High toughness chromium cold work tool steel, high temperature tempering after the heat treatment can reach the high hardness of 62 HRC, especial good for much EDM wire cut works to reduce the breakage. |
Suitable for stamping die, cold forming, deep drawing, thread rolling, punches for high speed blanking, stainless steels materials. |
| Finkl | |||||
| P20 HH | P20 Modified | Prehardened | 36-42 | With special chemical composition adjustment and good forging process/forging ratio, mechanical properties are better than normal AISI P20 tool steels. | High quality mold inserts, best suitable for plastic molding of PA,POM, PS, PE, PP, ABS. |
| P20 LQ | P20 Mod. (Optical Quality) | Prehardened | 36-42 | High purity and less segregation are obtained by double vacuum melting processes (VAD + VAR) in order to obtain good polishability |
Suitable for plastic mold with optical requirement without requiring to handle corrosive plastics |
| Lung Kee Special Steel | |||||
| LKM 638 | P20 | Prehardened | 29-32 | High machinability | High quality mold base or large core parts. |
| LKM 2311 | P20 | Prehardened | 29-35 | Pre-hardened type tool steel for plastic mold. | mold for high quality plastic with long run production. |
| LKM 2312 | P20 + S | Prehardened | 29-35 | Excellent machinability, most suitableable for high speed volume machining. |
Plastic mold for general use and core parts |
| LKM 738 | P20 + Ni | Prehardened | 29-35 | High quality pre-hardened type tool steel, uniform in hardness and high machinability |
Mold with high toughness and good finishing. |
| LKM 738H | Prehardened | 36-42 | |||
| LKM838H | P20 Mod. | Prehardened | 36-42 | With special adjustment to the chemical composition, LKM838H’s thermal conductitvity,machinability, polishability and weldability are better than normal AISI P20 tool steels. |
Suitable for plastic molding of PA,POM, PS, PE, PP, ABS with the requirement of high hardness, polishability and wear resistance. |
| LKM818H | P20 Modified | Prehardened | 36-42 | Pre-hardened type, high purity with isotropic microstructure contains 1 |
High quality mold inserts, suitable for plastic molding of PA,POM, PS, PE, PP, ABS. |
| LKM 2711 | P20, Premium | Prehardened | 36-43 | High hardness and high toughness | Suitable for medium plastic molds requiring high hardness with good toughness |
| LKM420 | 420 | Through Hardened | 50-52 | Good anti-rusting property. Hardness can be increased up to HRC 50 – 52 for plastic mold application | Plastic mold with requirement of anti-rusting |
| LKM420H | 420 | Prehardened | 29-35 | Good anti-rusting property. | Plastic mold with requirement of anti-rusting and mouldbase with corrosion resistance requirement |
| LKM 2083 | 420 | Through Hardened | 50-52 | Hardness can be obtained up to 50 – 52 HRC with proper heat treatment in order to obtain better polishability, wear resistance and/or corrosion resistance |
Corrosion resistance plastic molds. |
| LKM 2083H | Prehardened | 29-35 | Pre-hardened type, corrosion resistance, high polishabity | ||
| LKM 2316A | SUS 420 J2 | Through Hardened | 50-52 | Hardness can be obtained up to 47 HRC with proper heat treatment in order to obtain the better wear resistance and corrosion resistance than pre-hardened condition |
High corrosion resistance plastic molds. |
| LKM 2316 | Prehardened | 29-35 | Pre-hardened type, high corrosion resistance | ||
| LKM 2316ESR | SUS 420 J2, ESR | Prehardened | 29-35 | High cleanliness, high corrosion resistance | High corrosion resistance molds with good polishability. |
| LKM H13 | H13 | Through Hardened | 50-52 | Good toughness | Suitable for hard plastic molds, sliders, zinc die casting dies. |
| LKM 2343 | H11 | Through Hardened | 50-52 | Good high temperature strength and high toughness, good resistance to heat checking |
Suitable for die casting for aluminium and zinc alloys, hard plastics molds. |
| LKM 2343 ESR | H11 ESR | Through Hardened | 50-52 | Homogenous structure and good isotropic property. Good plastic mold with high polishing requirement |
Suitable for die casting for magnesium, aluminium and zinc alloys. Good for plastics molds with high polishing requirement. |
| LKM 2344 | H13 | Through Hardened | 50-52 | Good high temperature strength, suitable for die casting mold | Suitable for die casting for aluminium and zinc alloys, hard plastics molds. |
| LKM 2344 ESR | H13, ESR | Through Hardened | 50-52 | Homogenous structure and good isotropic property. Good plastic mold with high polishing requirement |
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| LKM 2344-SUPER | H13, MICRODIZED + ESR | Through Hardened | 50-52 | High toughness and good high temperature strength, with high impact strength exceeding 300J |
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| LKM 2510 | O1 | Through Hardened | 50-52 | High hardenability and wear resistance cold work tool steel | Shearing blades, cold forming, blanking and punching dies. |
| LKM 2379 | D2 | Through Hardened | 50-52 | High chromium cold work tool steel with good toughness. | Suitable for cold extrusion and forming, cold drawn, punching and blanking of high hardness metal sheet and stainless sheet. |
| LKM 2767 | 6F7 (High toughness multi-purpose tool steel) | Through Hardened | 50-52 | High strength and toughness, can be hardened to HRC 50~54. | Suitable for shearing and blanking of sheet metal with 10mm thick or above |
| Sinto | |||||
| PORCERAX II PM – 35 |
Sintering power metallurgical porous material | Prehardened | 38-43 | High quality pre-hardened type permeable porous material with high corrosion resistance, high machinability and EDM machinability (Supplied with 7 and 20 µm pore sizes) |
molds for high quality plastic or die-casting parts with thin wall or intricated structure. Remedy for quality and productivity problems due to gas trapping during injection molding. |
| USA Brush Wellman Beryllium Copper Alloy | |||||
| MOLDMAX 40 | – | Age Hardening | 36-42 | High strength beryllium copper alloy, very high thermal conductivity, shorten molding cycle effectively. |
Best suitable for mold core and insert which require rapid cooling. |
| EDM Copper | |||||
| C1100P | JIS H3100 | – | Extremely high purity, good electrical conductivity, high machinability, low thermal deformation |
EDM copper electrode. | |
| USA ALCOA Aluminium Alloy | |||||
| 6061-T6/T651/T6511 | – | Age Hardening | Aluminium alloy with good corrosion resistance, excellent joining characteristics and anodizing |
Thermoforming, blow molding, ultrasonic welding and machine parts. | |
| SWISS ALCAN high hardness Aluminium Alloy | |||||
| CERTAL 7022-T651/T652 | AlZnMgCu0.5 | Age Hardening | 7 | High Strength, high hardness, good machinability | Plastic injection molding, blow molding, ultrasonic welding and machine parts |
| China high quality plastic mold steel | |||||
| WY718 | P20+Ni | Prehardened | 29-35 | Prehardened plastic mold steel | mold Base and core part of plastic mold |
| WY2311 | P20 | ` | 29-35 | Prehardened plastic mold steel | mold Base and core part of plastic mold |
| High quality plain carbon steel | |||||
| S50C – S55C | 1050 – 1055 | 7-20. | High machinability | Suitable for plastic mold base and machinery parts | |