E18 GROUND PRECISION PARTS – MATERIALS AND COATINGS Carrier material = Cold work steel, alloyed (WS) Material no.: 1.2210, 1.2067 or similar Characteristics: Cold work steel tools have a hard, wear-resistant surface layer and a relatively tough, lower impact core. Cold work steels can be used at tool temperatures up to approx. 200°C. WS = material code = "1" e.g. Order no. = 239.1. ... Carrier material = Cold work steel, high-alloyed, with 12% Cr (HWS) Material no: 1.2436, 1.2379 or similar Characteristics: See WS. High chromium content increases resistance to wear and toughness and contributes to resistance to corrosion. Molybdenum increases heat resistance and additionally improves corrosion and resistance to wear. HWS = material code = "2" e.g. Order no. = 260.2. ... Carrier material = High-speed steel (HSS) Material no: 1.3343 or similar Characteristics: High-speed steel tools are typically used in applications with high cutting speeds. The high temperatures require particularly excellent tempering resistance and hot hardness. High-speed steel can be used at tool temperatures up to approx. 600°C. HSS = material code = "3" e.g. Order no. = 220.3. ... Carrier material = High-speed steel, nitrided (HST) Material no: 1.3343 or similar Characteristics: See HSS. The nitrogen nitrides diffused in during the nitriding treatment give the tool part even greater resistance to wear and the best possible protection against cold welding. HST = material code = "4" e.g. Order no. = 223.4. ... Carrier material = High-speed steel produced by powder metallurgy (ASP23/ASP2023) Material no: 1.3395 or similar Characteristics: High-speed steel produced by powder metallurgy. Greater toughness and resistance to wear than HSS due to excellent homogeneity of the material. ASP 23 ASP 2023 = material code = "6" e.g. Order no. = 223.6. ... Carrier material = Hot-work tool steel, nitrided (NWA) Material no: 1.2344 or similar Characteristics: Hot-work tool steels have particularly hot hardness, temper resistance, toughness and thermal shock resistance. Hot-work tool steels are used for temperatures above 200°C in continuous operation. The nitrogen nitrides diffused in during the nitriding treatment give the tool part even greater resistance to wear and the best possible protection against cold welding. NWA = material code number = "8" e.g. Order no. = 237.8. ... Carrier material = Carbide (HM) Characteristics: Powder metallurgically produced WC-based carbide. Carbide is characterised by high hardness and resistance to wear, resulting in excellent tool service life. Higher flexural strength and residual porosity through post-compaction in the HIP procedure. HM = material code = "9" e.g. Order no. = 270.9. ...
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