ELMAX SuperClean Uddeholm Elmax SuperClean
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1 ELMAX SuperClean Uddeholm Elmax SuperClean
2 REFERENCE STANDARD AISI WNr. JIS ASSAB DF-2 ARNE O1 ( (SKS 3 ASSAB DF-3 O1 ( (SKS 3 ASSAB XW-5 SVERKER 3 D6 (D3 ( (SKD 2 ASSAB XW-10 RIGOR A SKD 12 ASSAB XW-41 SVERKER 21 D SKD 11 ASSAB XW-42 D SKD 11 CARMO CARMO CALMAX CALMAX CALDIE CALDIE ASSAB 88 SLEIPNER ASSAB PM 23 SUPERCLEAN VANADIS 23 SUPERCLEAN (M3: SKH 53 ASSAB PM 30 SUPERCLEAN VANADIS 30 SUPERCLEAN (M3:2 + Co SKH 40 ASSAB PM 60 SUPERCLEAN VANADIS 60 SUPERCLEAN ( VANADIS 4 EXTRA SUPERCLEAN VANADIS 4 EXTRA SUPERCLEAN VANADIS 6 SUPERCLEAN VANADIS 6 SUPERCLEAN VANADIS 10 SUPERCLEAN VANADIS 10 SUPERCLEAN VANCRON 40 SUPERCLEAN VANCRON 40 SUPERCLEAN ELMAX SUPERCLEAN ELMAX SUPERCLEAN ASSAB 518 P ASSAB 618 P20 Mod ASSAB 618 HH P20 Mod ASSAB 618 T P20 Mod Mod. ASSAB 718 SUPREME IMPAX SUPREME P20 Mod ASSAB 718 HH IMPAX HH P20 Mod NIMAX NIMAX MIRRAX 40 MIRRAX Mod. VIDAR 1 ESR VIDAR 1 ESR H SKD 6 UNIMAX UNIMAX CORRAX CORRAX ASSAB SUS 420J2 STAVAX ESR STAVAX ESR 420 Mod ESR SUS 420J2 MIRRAX ESR MIRRAX ESR 420 Mod. POLMAX POLMAX RAMAX HH RAMAX HH 420 F Mod. ROYALLOY ROYALLOY PRODAX ASSAB MM40 ALVAR 14 ALVAR SKT 4 ASSAB SKT 4 ASSAB M ORVAR 2M H SKD 61 ASSAB 8407 SUPREME ORVAR SUPREME H13 Premium ESR SKD 61 DIEVAR DIEVAR HOTVAR HOTVAR QRO 90 SUPREME QRO 90 SUPREME FORMVAR FORMVAR ASSAB SNCM8 ASSAB SCM4 ASSAB S50C ASSAB is a trademark of ASSAB Pacific Pte Ltd. The information contained herein is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as a warranty of specific properties of the products described or a warranty for fitness for a particular purpose. Each user of ASSAB products is responsible for making its own determination as to the suitability of ASSAB products and services. Edition
3 General Elmax SuperClean is a high chromium-vanadiummolybdenum alloyed steel with the following characteristics: Good corrosion resistance High wear resistance High polishability Very good dimensional stability High wear resistance is normally associated with low corrosion resistance and vice versa. In Elmax SuperClean, however, this unique combination of good corrosion resistance and high abrasive wear resistance is achieved by SuperClean powder metallurgical process and its unique chemistry. Elmax SuperClean offers a possibility to make longlife, low-maintenance moulds for the best overall moulding economy. Properties PHYSICAL PROPERTIES Hardened and tempered to 58 HRC. Temperature 20 C 200 C 400 C Density kg/m Modulus of elasticity MPa Coefficient of thermal expansion per C from 20 C Thermal conductivity* W/m C Specific heat J/kg C x x * Thermal conductivity is difficult to measure. The scatter may be as high as ±15%. Typical analysis % Standard spec. Delivery condition C 1.7 None Si 0.8 Mn 0.3 Cr 18.0 Mo 1.0 Soft annealed to approx. 280 HB V 3.0 COMPRESSIVE STRENGTH Approximate values at room temperature. Hardness 60 HRC 55 HRC 50 HRC Colour code mirror side STAVAX ESR MIRRAX ESR POLMAX ELMAX SuperClean Blue / Black stamper side ELMAX SuperClean (surface treated Compressive strength, Rmc MPa Compressive yield strength, Rc0.2 MPa CORROSION RESISTANCE Moulds made from Elmax SuperClean will have good resistance to corrosion when moulding corrosive plastics under normal production conditions. Recommended ASSAB plastic-mould steels for DVD mould. Applications Elmax SuperClean has been specially developed for hightech applications where high abrasion high corrosion resistance and long-run prodution are required. TYPICAL APPLICATIONS Electronic products such as connectors, plugs, switches, resistors, integrated circuits, etc. Toolings and components used in the foodprocessing industry, and industrial and custom knives where a combination of corrosion resistance and wear resistance are required Screws, barrels and nozzle tips Different parts produced in tools made from Elmax SuperClean. 3
4 Heat treatment SOFT ANNEALING Protect the steel and heat through to 980 C, holding time 2 hours. Then cool in furnace 20 C/h to 850 C. Holding time 10 hours. Cool slowly to 750 C. Then freely in air. STRESS RELIEVING After rough machining, the tool should be heated through to 650 C, holding time 2 hours. Cool slowly to 500 C, then freely in air. HARDENING Preheating temperature: C Austenitising temperature: C, normally 1080 C TEMPERING Choose the tempering temperature according to the hardness required by reference to the tempering graph. Temper at least twice with intermediate cooling to room temperature. The preferred tempering temperature is 250 C or higher. In exceptional cases, a minimum tempering temperature of 180 C can be used for small simple inserts and parts where toughness is of less importance. The minimum holding time at tempering temperature is 2 hours. Tempering graph Temperature C Holding time* minutes Hardness before tempering 60 HRC 61 HRC 61 HRC Holding time* = Time at austenitising temperature after the tool is fully heated through. Protect the tool against decarburisation and oxidation during hardening. CCT graph Austenitising temperature 1050 C. Holding time 30 minutes. Above tempering curves are obtained after heat treatment of samples with a size of 15 x 15 x 40 mm, cooling in forced air. Lower hardness can be expected after heat treatment of tools and dies due to factors like actual tool size and heat treatment parameters. Cooling Curve No. Hardness HV 10 T sec
5 QUENCHING MEDIA N 2 with sufficient overpressure quenching in vacuum furnace Fluidised bed or salt bath C, then cool in air Forced air / gas In order to obtain optimum properties for the tool, the cooling rate should be fast, but not at a rate that will gives excessive distortion or crack. Temper immediately when the tool reaches C. DIMENSIONAL CHANGES DURING HEAT TREATMENT Illustration of the effect from austenitising temperature and sub-zero cooling Specimen size: 40 x 40 x 40 mm HEAT-TREATMENT CYCLE Austenitising 1050 C / 30min 1050 C / 30min Quenching medium air air Sub-zero treatment -60 C Tempering 230 C / 2 x 2 h 230 C / 2 x 2 h SUB-ZERO TREATMENT Recommended for specific optimum property Optimum Corrosion Resistance Austenitising 1050 C 1080 C Sub-zero* -150 C -150 C Tempering 2 x 250 C 2 x 250 C Hardness approx HRC approx HRC Optimum Wear Resistance Best Dimensional Stability Austenitising 1080 C C Sub-zero* -150 C -150 C Tempering 2-3 x 480 C 2-3 x 480 C Hardness approx HRC approx HRC Parts requiring high dimensional stability should be sub-zero treated, otherwise volume changes may arise after heat treatment and/or during the usage of the mould. Immediately after quenching, the piece should be sub-zero treated followed by tempering. Elmax SuperClean is commonly sub-zero treated between -150 C and -196 C, although occasionally -70 C to -80 C are used due to constraints of the sub-zero medium and equipment available. Soaking time 1-3 hours, followed by tempering. The first sub-zero treatment should be carried out directly after hardening and before any tempering without delay. When maximum dimensional stability is required more sub-zero treatments may be applied in between the tempering operations. In this case, it is important to always end with a tempering as the last operation. 1-3 hours sub-zero treatment result in an increased hardness of about 1-3 HRC. Note: Avoid intricate shapes as there is a risk of cracking. * Sub-zero temperatures of -150 C is nowadays commonly used. 5
6 Machining recommendations The cutting data below are to be considered as guiding values and as starting points for developing your own best practice. Condition: Soft-annealed condition ~280 HB TURNING Cutting data parameters Cutting speed (v c m/min Turning with carbide Rough turning Fine turning Turning with HSS Fine turning MILLING Face and square shoulder milling Cutting data parameters Cutting speed (v c m/min Feed (f z mm/tooth Depth of cut (a p mm Rough milling Milling with carbide Fine milling Feed (f mm/r Depth of cut (a p mm Carbide designation ISO High-speed steel * Use a CVD coating DRILLING High-speed steel twist drill Drill diameter mm K20, P10 - P20 Coated carbide* Cutting speed (v c m/min K15, P10 Coated carbide* Feed (f mm/r * * Carbide designation ISO * Use a CVD coating End milling Cutting data parameters Cutting speed (v c m/min Feed (f z mm/tooth Carbide designation ISO K20, P20 Coated carbide* Solid carbide Type of end mill Carbide indexable insert High-speed steel K15, P10 Coated carbide* K15, P10 - P20 Coated carbide * * For coated HSS end mill, v C = m/min 2 Depending on radial depth of cut and cutter diameter 3 Use a CVD coating * For coated HSS drill, v C = m/min Carbide drill Cutting data parameters Cutting speed (v c m/min Indexable insert Type of drill Solid carbide Carbide tip GRINDING Wheel recommendation Type of grinding Face grinding straight wheel Face grinding segments Cylindrical grinding Soft-annealed condition A 46 HV A 36 GV A 60 KV Hardened condition B 151 R50 B3 1 A 46 GV A 46 GV B 151 R50 B3 1 A 60 JV Feed (f mm/r Internal grinding A 60 JV B 151 R75 B3 1 A 60 IV 1 Drill with replaceable or brazed carbide tip 2 Feed rate for drill diameter mm 3 Feed rate for drill diameter 5-20 mm 4 Feed rate for drill diameter mm Profile grinding A 100 IV B 126 R100 B6 1 A 100 JV 1 If possible, use CBN wheels for this application 6
7 Electrical discharge machining If EDM is performed in the hardened and tempered condition, finish with fine-sparking, i.e., low current, high frequency. For optimal performance, the following precautionary measures are recommended: The surface layer affected by EDM should be removed by polishing or stoning; or The tool retempered at approx. 25 C lower than the original tempering temperature; or A combination of the two precautionary measures mentioned above. When EDM'ing larger sizes or complicated shapes, Elmax SuperClean should be high-temperature tempered. Further information For further information, i.e., steel selection, heat treatment, application and availability, please contact our ASSAB office nearest to you. Relative comparison of ASSAB plastic-mould steels ASSAB grade Machinability Wear resistance Polishability Corrosion resistance ASSAB 618 NIMAX CORRAX VIDAR 1 ESR ASSAB 8407 SUPREME STAVAX ESR POLMAX MIRRAX ESR MIRRAX 40 UNIMAX ASSAB XW-10 ELMAX VANADIS 4 EXTRA VANADIS 10 VANCRON 40 RAMAX HH ROYALLOY ASSAB 618, Nimax, Mirrax 40, Royalloy and Ramax HH are tested in prehardened condition. Corrax is tested in solution-treated condition. 7
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11 Elmax SuperClean Ningbo ASSAB Tooling Technology (Ningbo Co., Ltd. Tel : Fax: info.ningbo@assab.com Cikarang* PT. ASSAB Steels Indonesia Tel : Fax: / info.cikarang@assab.com MALAYSIA Kuala Lumpur - Head Office ASSAB Steels (Malaysia Sdn. Bhd. Tel : Fax: /55 info.kualalumpur@assab.com Jiangxi* ASSAB Tooling (Dong Guan Co, Ltd., Jiangxi Branch Tel : Fax : info.jiangxi@assab.com 11
12 Choosing the right steel is of vital importance. ASSAB engineers and metallurgists are always ready to assist you in your choice of the optimum steel grade and the best treatment for each application. ASSAB not only supplies steel products with superior quality, we offer state-of-the-art machining, heat treatment and surface treatment services to enhance steel properties to meet your requirement in the shortest lead time. Using a holistic approach as a one-stop solution provider, we are more than just another tool steel supplier. ASSAB and Uddeholm are present on every continent. This ensures you that high-quality tool steels and local support are available wherever you are. Together we secure our position as the world's leading supplier of tooling materials. For more information, please visit
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