The processing of fibre-reinforced plastics requires hardenable, corrosion-resistant tool steels with a high carbide content, approx. 13 to 20 % Chromium, additions of Molybdenum, Tungsten and Vanadium and a hardness of 50 to over 60 HRC. In High-Nitrogen Steels, Carbon is partially replaced by Nitrogen to achieve a hardness of approx. 58 HRC with the best corrosion resistance.
This group of steels is specially designed for use as corrosion-resistant tool steels in plastics processing when corrosion and wear resistance are of primary importance, as is the case, for example, when processing fibre-reinforced and heavily filled, aggressive plastics. Experience shows that corrosion-resistant tool steels with hardnesses of over 50 HRC are then required. Under particularly critical operating conditions, however, steels with a higher carbide content and hardnesses above 60 HRC are often essential.
Steels in this product group are usually selected hardenable, martensitic stainless steels with approx. 13 to 20 % Cr , alloyed with Mo , W and V and a C content of approx. 0.40 to over 2%.
In general, the production of these steels with regard to purity, homogeneity and analytical balance takes special account of the needs of plastics processing with regard to polishability and corrosion resistance, and high-purity steels are frequently produced by remelting processes, e.g. electroslag (ESR), or extremely homogeneous, high-alloy steels are produced by powder metallurgy.
A special category of hardenable corrosion resistant steels are High Nitrogen Steels (HNS). In such steels the high Carbon (C)- content present usually in steels of this group is reduced and part of the Carbon is replaced by Nitrogen(N). This results in a hardness of approx. 58 HRC together with the best corrosion resistance and optimum homogeneity and prevents the excessive bonding of Chromium in the form of carbides. Usually remelting of this steel takes place in the special Pressure Electroslag Remelting Process (PESR).
BÖHLER M310 ISOPLAST is a corrosion-resistant, martensitic chromium steel which, through electroslag remelting and optimization of the chemical composition, has a good homogeneity and a balanced hardness-toughness-corrosion resistance ratio.
Read MoreBÖHLER M333 ISOPLAST is a corrosion-resistant, martensitic plastic mold steel with excellent polishability and toughness for products with highest surface requirements. BÖHLER M333 ISOPLAST is also approved for food and beverage contact.
Read MoreBÖHLER M340 ISOPLAST corresponds to a corrosion-resistant, martensitic chromium steel with improved wear resistance. This is ideal for the application area of glass fiber reinforced plastics. In addition, the BÖHLER M340 ISOPLAST is approved for food and beverage contact.
Read MoreBÖHLER M368 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to the alloy concept and the production route, the steel has a high wear resistance, high corrosion resistance and high toughness. In addition, BÖHLER M368 MICROCLEAN is approved for food and beverage contact.
Read MoreBÖHLER M380 ISOPLAST is a high-nitrogen alloyed, corrosion-resistant, martensitic plastic mold steel electro-slag remelted under pressure with excellent corrosion resistance, very good polishability and very high toughness combined with a high hardness of up to 60 HRC. In addition, BÖHLER M380 ISOPLAST is approved for contact with food and beverage.
Read MoreBÖHLER M390 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to its alloy design, this steel has very high wear resistance and good corrosion resistance. In addition, BÖHLER M390 MICROCLEAN is approved for food and beverage contact.
Read MoreBÖHLER M398 MICROCLEAN is a corrosion-resistant, martensitic chromium steel produced by powder metallurgy. Due to its alloy design, this steel has good corrosion resistance and higher wear resistance compared to BÖHLER M390 MICROCLEAN.
Read MoreUddeholm Corrax is a precipitation hardening steel with a unique set of properties that makes it perfect for many demanding applications. The superior resistance against corrosion combined with a hardness up to 50 HRC and a simple heat treatment makes Uddeholm Corrax the obvious choice for long run series of aggressive plastics such as PVC. The chemical composition makes Uddeholm Corrax easy to process by Additive Manufacturing. Hence, it is also available as powder for Laser Powder Bed Fusion (LPBF) and Laser Metal Deposition (LMD). Benefits Very good corrosion resistance Flexible hardness of 34-50 HRC achieved by ageing No hard “white layer” after EDM
Read MoreUddeholm Elmax Super Clean is a powder metallurgically produced mould steel characterized by a combination of very good wear resistance, corrosion resistance and dimensional stability. Recommended for long production runs of smaller and complicated shapes and/or reinforced plastics. High wear resistance is normally connected to low corrosion resistance and vice versa. In Uddeholm Elmax SuperClean it has however been able to achieve this unique combination of properties by a powder-metallurgy-based production. Uddeholm Elmax SuperClean offers a possibility to make long-life, low maintenance moulds for the best overall moulding economy. Benefits Less wear because of god wear resistance Less indentations because of compressive strength Less maintenance because of corrosion resistance Less adjustments after heat treatment because of good dimensional stability Standard specification AFNOR Z170 CVD 17.3
Read MoreUddeholm Mirrax ESR is a through hardening corrosion resistant steel with very good polishability. Mainly intended for medium to large cross sections. It has a unique combination of toughness, corrosion resistance and through hardening properties. Benefits Low mould maintenance costs: The surface of cavity impressions retain their original finish over extended running periods. Moulds stored or operated in humid conditions require less protection. Low production costs: Water cooling channels are less affected by corrosion Heat transfer characteristics, and therefore cooling efficiency, are constant throughout the mould life, ensuring consistent cycle times. Safe mould use because of good toughness also in big dimensions
Read MoreUddeholm Stavax ESR is a premium stainless mould steel for small and medium inserts and cores. Uddeholm Stavax ESR combines corrosion and wear resistance with excellent polishability, good machinability and stability in hardening. Mould maintenance requirement is reduced by assuring that core and cavity surfaces retain their original finish over extended operating periods. When compared with non stainless mould steel, Uddeholm Stavax ESR offers lower production costs by maintaining rust free cooling channels, assuring consistent cooling and cycle time. This classic stainless tool steel is the right choice when rust in production is unacceptable and where requirements for good hygiene are high, as within the medical industry, optical industry and for other high quality transparent parts. Uddeholm Stavax ESR is a part of the Uddeholm Stainless Concept. Benefits Low mould maintenance because of corrosion resistance: Surfaces retain their original finish Less production during storing and operation in humid condition Lower production costs: Since water-cooling channels are unaffected by corrosion Heat transfer characteristics, and therefore cooling efficiency, are constant throughout the mould life, ensuring consistent cycle times. Long life mould Standard specification W.nr 1.2083 / AISI 420 / AFNOR Z40 CV 14 (RSL)
Read MoreUddeholm Tyrax ESR combines best in class toughness, corrosion and wear resistance. This grade was developed for molding of high performance plastics often filled with glass fiber reinforcements and additives like flame retardants. This matrix- based microstructure is designed to achieve a high-gloss surface by only a few polishing steps, dramatically reducing the tool lead time and enabling production of top quality plastic parts. Uddeholm Tyrax ESR can achieve a high hardness (up to 58 HRC) and is a suitable upgrade from AISI 420 ESR, AISI S7 and AISI 440C. Benefits good dimensional stability at heat treatment and in service even microstructure and small grain size good hardenability Uddeholm Tyrax is also available for Additive Manufacturing, powder for processing Laser Powder Bed Fusion (LPBF) and Laser Metal Deposition (LMD).
Read MoreUddeholm Vanax SuperClean is the long-awaited response to the market’s need for steel that is both strong and stainless. Combining the corrosion resistance of austenitic stainless steel such as AISI 316L, with a hardness of 60 HRC and the wear resistance of a cold work tool steel, opens up new opportunities. Where no previous materials suffice, this powder metallurgical steel grade offers resistance in the most corrosive environments possible. From start to finish, its unique material properties provide reliable performance in the most extreme conditions and for the most demanding working materials. Benefits Uddeholm Vanax SuperClean has an excellent corrosion resistance both in low and high temperature tempered condition in combination with good wear resistance to counteract mixed wear/galling/fretting. Applications are e.g. found in plastic moulding, food processing and engineering designs.
Read More