CarTech Micro-Melt M42 Steel

Steel name: CarTech Micro-Melt M42
Diagram No.: 2314
UNS designation: T11342
AISI/SAE designation: M42
Chemical composition in weight %: 1.10% C, 0.60% Si, 0.30% Mn, max. 0.060% S, 3.75% Cr, 9.50% Mo, 1.15% V, 1.50% W, 8.25% Co
Steel group: PM high speed steels
Properties: CarTech Micro-Melt M42 alloy is a powder metal super-high-speed steel possessing a hardness capability of Rockwell C 68/70. This alloy has been used for cutting tools in the toughest machining operations. The advantages of CarTech Micro-Melt premium powder high speed steel include ease of grinding, response to heat treatment, more uniform structure, greater wear resistance and improved toughness.
Applications: Twist drills,turning tools, end mills, milling cutters, broaches, router bits, form tools, keyway cutters, dovetail tools, flycutters, thread rolling dies, tool bits.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: For best results Micro-Melt M42 alloy should be heat treated from properly rectified salt baths or controlled atmosphere furnaces. Preheat to 1500/1600°F (816/871°C) in a neutral salt bath. After thorough preheating, transfer to a salt bath with a temperature maintained at 2150/2200°F (1177/1204°C) and oil quench. Small sizes under about 1" (25.4 mm) in diameter or delicate sections may be hardened by cooling in still air. It is also acceptable to quench in molten salt at temperatures of 1000/1100°F (538/593°C), equalizing for 5 minutes per inch followed by air cooling.
Tempering: Tools should be tempered immediately after the completion of the quench. The tempering temperature may be varied according to the desired hardness but is usually in the range of 1000/1050°F (538/566°C). Triple tempering is always suggested.
Diagram note: No data

Effect Tempering Temperature on Hardness

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