AISI M2 Steel

AISI M2 Steel

Steel name: AISI M2
Table No.: 1725
Chemical composition in weight %: 0.78-0.88% C, 0.20-0.45% Si, 0.15-0.40% Mn, max. 0.030% P, max. 0.030% S, 3.75-4.00% Cr, 4.50-5.50% Mo, 1.75-2.20% V, 5.50-6.75% W
Steel group: High speed steels
Properties: No data
Applications: M-2 is a widely used type of high-speed steel. Its a higher carbon content and balanced analysis produce properties applicable to all general purpose high speed uses.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Harden M2 by preheating slowly to 1500° F and holding until thoroughly soaked . Heat rapidly to 2250° F to 2275° F. Generally, total heating time in the furnace varies from a few minutes to a maximum of 15 minutes, depending on the size of the tool. Oil quenching from the hardening temperature is preferred for developing full hardness, although air quenching ot quenching in hot salt or lead may be done. When the tools have reached a temperature of 150° F to 200° F in the quench, temper immediately. Precaustions should be taken to prevent decarburization on tools which cannot be ground after harding. For this purpose non-oxidizing furnace atmospheres or salt baths may be used.
Tempering: The best tempering range for M-2 is 1000° F to 1050°F. This results in the best combination of cutting ability, hardness, strengh, and toughness.

Table Tempering Temperature (F) - Hardness (HRC)

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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