CarTech Micro-Melt M48 Steel

CarTech Micro-Melt M48 Steel

Steel name: CarTech Micro-Melt M48
Diagram No.: 2315
UNS designation: T11348
AISI/SAE designation: M48
Chemical composition in weight %: 1.55% C, max. 0.070% S, 4.00% Cr, 5.25% Mo, 3.10% V, 10.00% W, 9.00% Co
Steel group: PM high speed steels
Properties: CarTech Micro-Melt M48 alloy is a super high speed steel possessing abrasion resistance equal to T15 and superior red hardness to T15 and M42. It is heat treatable to HRC 70 and is a good candidate for special purpose cutting tools where other ASTM M40 series high speed steels are inadequate CarTech Micro-Melt M48 alloy is suggested for use where high red hardness, high abrasion resistance, and good toughness are required.
Applications: Milling cutters, form tools, end mills, broaches, cutting tool inserts, reamers, extrusion die inserts, cut-off tools.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: It is customary to use two furnaces to harden Micro-Melt M48 alloy. One furnace is used to preheat the workpiece to 1500/1550°F (816/843°C), and the second is used to rapidly heat the workpiece from the preheating temperature to the hardening temperature of 2100/2200°F (1149/1204°C). Typical soak times are 2-3 minutes at the high temperature.
Tempering: Tempering should be performed immediately after quenching and cooling of the workpiece below 150°F (66°C), or as soon as it can be touched comfortably with a bare hand. The tempering temperature may be varied depending upon the application and desired hardness. Triple tempering is required and four tempers are desirable. Typical tempering is performed at 1000°F (538°C) for two hours at temperature followed by air cooling to room temperature. This cycle is repeated twice to obtain triple tempering.
Diagram note: No data

Effect Tempering Temperature on Hardness

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