OTAI Special Steel is DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel stockholders and suppliers from china. We have more than 16 years experience in DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel supply. DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel is a tungsten-molybdenum type,general purpose hss steel that as per AISI/ASTM standard. The wear resistance is better than AISI T1 steel. DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel has higher hot hardness, it can withstand increases in temperature without losing its temper. AISI M2 steel offers high toughness combined with good cutting powers.

1. Related Specifications of DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel

ASTM W-Nr. JIS DIN GB BS KS
M2 1.3343 SKH9 S6-5-2 W6Mo5Cr4V2 BM2 SKH51

2. DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel chemical composition

C(％) Si(％） Mn(％) P(％) S(％) Cr(％) Mo(％) V（％）
0.78-0.88 0.20-0.45 0.15-0.40 ≤0.030 ≤0.03 3.75-4.50 4.50-5.50 1.75-2.20

3. Supply range of DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel

DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel
4. DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel Mechanical Properties

Density         0.294 lb/in3 (8138 kg/m3)
Specific Gravity                  8.15
Modulus of Elasticity         0.294 lb/in3 (8138 kg/m3)
Thermal conductivity         24 Btu/ft/hr/°F  41.5 W/m/°K
Machinability          65% of a 1% carbon steel
  • AISI M2 Tool Steels Properties Mechanical
Mechanical properties Metric Imperial
Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F) 62 62
Hardness, Rockwell C (as hardened, quenched at 2200°F) 65 65
Compressive yield strength (when tempered at 300°F) 3250 MPa 471000 psi
Izod impact unnotched (when tempered at 300°F) 67 J 49.4 ft-lb
Abrasion (loss in mm3, as-hardened; ASTM G65) 25.8 25.8
Abrasion (loss in mm3, tempered at 1275°F; ASTM G65) 77.7 77.7
Poisson’s ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30458 ksi
  • M2 Steels Thermal Properties
Thermal properties Metric Imperial
CTE, linear (@20.0 – 100°C/ 68.0 – 212°F) 10 μm/m°C 5.56 μin/in°F
CTE, linear (@20.0 – 500°C/68.0 – 932°F) 12.2 μm/m°C 6.78 μin/in°F
CTE, linear (@20.0 – 850°C/68.0 – 1560°F) 12.6 μm/m°C 7 μin/in°F

 

5. Forging of DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel

Pre heat M2 HSS steel slowly and uniformly to 850-900°C. The heat should then be increased more quickly to the forging temperature of 1050-1150°C. If during the forging the temperature of the M2 high speed tool steel material drops below 880-900°C, re-heating will be necessary. Cool the M2 steel component very slowly after forging.

6. Heat Treatment of DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel

  • Anneal

Heat to 1600° F, soak thoroughly at heat. Furnace cool 25° F per hour to 900° F, air cool to room temperature. Approximate annealed hardness 241 Maximum Brinell.

Stress Relief of Unhardened Material: Heat slowly to 1200 to 1250° F. Soak for two hours per inch of thickness at heat. Slow cool (furnace cool if possible) to room temperature.

  • Harden

Heat slowly to 1550° F, soak thoroughly, heat to 1850° F, soak thoroughly. Soak time in the furnace varies from a few minutes to 15 minutes, depending tool size, heat capacity of the furnace, and the size of the charge. – Heat to 2150 to 2200° F for max. toughness and minimum distortion. – Heat to 2250 to 2275° F for max. hardness and abrasion resistance.

  • Quench

For full hardness, oil quench to 150-200° F. Air quench to 150° F. When quenching in hot salt maintain the quench just above the Ms temperature. After equalizing withdraw parts from the hot salt and air cooled to 150° F.

  • Temper

Double temper is mandatory, three tempers are sometimes preferred. Soak for 2 hours per inch of thickness. Air cool to room temperature between tempers. The best tempering range for hardness, strength and toughness is 1000 to 1050° F.

Temper° F Rockwell “C” Temper° F Rockwell “C”
As-quenched 64 900 64
400 63 1000 65.5
500 62.5 1050 63.5
600 62.5 1100 61.5
700 62.5 1150 60
800 63.5 1200 53

7. Machinability of DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel

Shaping of HSS M2 tool steels can be carried out using grinding methods. However, they have poor grinding capability and hence they are regarded as “medium” machinability tool steel under annealed conditions. The machinability of these tool steels M2 is only 50% of that of the easily machinable W group or water hardening tool steels.

8. DIN 1.3343 / AISI M2 HS6-5-2 High Speed Tool Steel Applications

The main use of high-speed steels continues to be in the manufacture of various cutting tools.

Typical applications for M2 high speed steel are twist drills, reamers, broaching tools, taps, milling tools, metal saws. M2 is suitable for cold forming tools such as extrusion rams and dies, also widely used in all kinds of cutting tools, knife and punches and die applications, plastic moulds with elevated wear resistance and screws.

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