M-2

*Always consult your Heat Treater*
      *Information Provided is General*
 

M-2 is a tungsten-molybdenum, general-purpose high-speed steel. Worldwide, the M-2 grade is by far the most popular high-speed steel, having replaced the T1 grade in most cases because of its superior properties and relative economy.

For optimum results, harden M-2 in properly rectified salt baths or controlled atmosphere or vacuum furnaces. When other furnaces are used, it is necessary to coat the steel with a protective material to prevent excessive decarburization and scaling.

M-2 should be preheated thoroughly at 1500 – 1550°F. Large or intricate tools should be given a double preheat at both 1100°F and at 1500 – 1550°F. After preheating, transfer to a high temperature bath or furnace. The exact hardening temperature to use will depend upon the type of work being treated, but in general, cutting tools should be hardened from the range of 2175 – 2225°F when salt bath hardened, and 2200 – 2250°F when furnace hardened. Punches, dies and other tools requiring toughness rather than red hardness usually are hardened from a temperature of 2050 – 2150°F.

After a short hold at the hardening temperature, quench without further soaking. Quench into salt at 1000 – 1100°F or warm oil. If salt quenched, then complete the quench in still air. If oil quenched, remove from the oil at about 900°F and air cool.All tools should be cooled down to at least 150°F prior to beginning tempering operation. For most applications, M-2 should be tempered in the range of 1000 – 1100°F, with 1025 – 1050°F being considered as a standard temperature. Heat slowly to the tempering temperature and hold for 2 hours. Cooling should follow in still air. Always allow tools to reach room temperature before retempering.

Hardening happens between 2175 – 2250°F.

M-2 is an oversized material.

 Flats

  •  + .015 up to .040 on thickness

  •  + .080 up to .125 on width

 Rounds

  •  Up to 1″ + .007 up to .0181

  •  1″ up to 6″ + .015 up to .0406

  •  6″ and up + .0625 up to .250

 Hardening Temp.:    2200 through 2250°F

 Quench Medium:    Salt Bath, Oil, Gas

 Tempering Range:    1020 through 1100°F

 Typical Hardness Level:    62 to 65 R/C

 Preheat Forging Temp.:    1400 through 1500°F

 Forging Temp:   2050 through 2080°F

 Anneal Temp.: 1525 through 1550°F

 Anneal Cooling Method:    Furnace Cool at 50°F per hr. max. to 1000°F, then air cool

 Anneal Hardness:     248 BHN 

 

 M-2 Material In Stock

 Color Code:    RED

 Flat Dimensions

  • Standard sizes, quoted upon request

  • Non-standard sizes, quoted upon request

 Round Dimensions

  • 3/32″ up to 8″

  • Non-standard sizes quoted upon request.

 M-2 Typical Analysis

C

Mn

Si

Cr

V

W

Mo

.85

.30

.30

4.15

1.95

6.40

5.00

 · Slight variations from typical analysis shown may occur in order to maintain the desired graphitizing potential.