CarTech Micro-Melt 420-CW Steel

CarTech Micro-Melt 420-CW Steel

Steel name: Micro-Melt 420-CW
Diagram No.: 2306
Chemical composition in weight %: 2.25% C, 0.90% Si, 0.50% Mn, max. 0.030% S, 12.80% Cr, 1.30% Mo, 9.25% V
Steel group: PM tool steels
Properties: CarTech Micro-Melt 420-CW tool steel is a corrosion-resistant, high vanadium wear-resistant tool steel produced using Carpenter’s CarTech Micro-Melt powder process. The wear resistance of this grade is comparable to CarTech Micro-Melt A11-LVC alloy. CarTech Micro-Melt 420-CW alloy also is comparable in toughness to CarTech Micro-Melt A11 alloy. CarTech Micro-Melt 420-CW may be considered for those applications where 440C and D2 tool steels do not have adequate wear resistance or for applications where A11-LVC, A11, D2 or other tool steels do not have adequate corrosion resistance.
Applications: Plastic injection molds and inserts, plastic injection and extrusion feedscrews, non-return valve components, pelletizing equipment, pelletizer blades, nozzles, gate and nozzle inserts, industrial knives, slitters, and cutters, wear-resistant specialty cutlery, wear components for food and chemical processing, bearings, bushings, valves, rolls, gear pumps.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Micro-Melt 420-CW tool steel should be heat treated using proper precautions to prevent decarburization. First preheat to 1500/1550°F (816/843°C), equalize, and transfer to a furnace maintained at the desired hardening temperature. Austenitize: 1950-2150°F (1066-1175°C) and hold time at temperature for 20-30 minutes.
Tempering: Tools should be tempered immediately after completion of the hardening treatment. The tempering temperature may be adjusted according to the final hardness desired. Double temper at 400-750°F (200-400°C). Hold for a minimum of 2 hrs. each temper. Tempering in this temperature range provides the best corrosion resistance and wear resistance. Tempering between about 800 and 1000°F (427 and 538°C) is not recommended. All martensitic stainless steels suffer from embrittlement when tempered in this range. For optimum stress relieving and dimensional stability, Micro-Melt 420-CW may be double tempered at 1025°F, but some loss of corrosion resistance may result. A –100°F refrigeration treatment may be employed between the first and second tempers, if desired. Freezing treatments should always be followed by at least one temper. The typical hardness of Micro-Melt 420-CW after hardening and tempering is 56-60 HRC.
Diagram note: No data

Effect Tempering Temperature on Hardness

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Disclaimer: The material data is a central depository of information based on global actual tests and calculated software data that is available to the public for a fee. The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.