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High Speed Steel 1.3346 Flat Bar

HSS 1.3346 is general used high speed steel.Also called AISI M1,it similar to HSS M42 tool steel,but without 8% cobalt. M1 high speed steel with excellent toughness and grind ability,These factors and its relatively low cost make 1.3346 an economic and efficient tool material....

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FEATURES: DIN1.3346 is Germany standard,It is also well know by AISI M1, HSS M1 is general-purpose high speed steel. In comparison with other popular high speed steels, High speed steel M1 with exhibits excellent toughness and grind-ability. These factors and its relatively low cost make it an economic and efficient tool material.


APPLICATIONS: Twist drills, taps, milling cutters, reamers, broaches, saws,etc.


COMPOSITION

C

Mn

Si

Cr

W

Mo

V

0.85

0.36

0.40

3.90

1.89

8.85

1.23


SIMILAR BRAND

GB

UNS

DIN

ISO

W2Mo9Cr4V

T11301

1.3346

HS2-9-4-1


METALLURGY METHOD:

NON-VACUUM FURNACE + LF FURNACE + ESR

Temper

(℃)

Density (g/cm3)

Elastic Modulus (KN/mm2)

Thermal expansion coefficient (20℃)

Heat transfer coefficient(W/m℃)

Specific heat

(J/Kg℃))

20

8.15

229

26

425

400

8.04

198

1.22x10-6

30

518

600

8.02

186

1.25x10-6

29

610


PHYSICAL PROPERTYS:

MACHINABILITY

M1 steels are medium machinable alloys. Machining should be carried out before performing hardening by heat treatment. The machinability of M1 molybdenum high speed tool steels is 50% of that of the W group or water-hardening low alloy tool steels.


HEAT TREATMENT

M1 steels are preheated at 760°C (1400°F ) before heat treatment. They are then heated rapidly to 1190°C (2175°F) for 3 to 5 min followed by oil-quenching, salt bathing or cooling in air. It is then subjected to tempering.


TEMPERING

M1 molybdenum high speed tool steels are tempered at 565°C (1050°F) for a long time in order to allow complete heating and cooling in air. The tempering process can be repeated for a second time in order to achieve best results and produce a part with hardness of 63 HRC.


ANNEALING

M1 steels are annealed at 857°C (1575°F). They are then furnace cooled at less than 4°C (40°F) per hour.after annealing .M1 with hardness no more than 255HB.


STANDARD SIZE & SURFACE CONDITION

Round Bar: Diameter 1.5mm to 200mm

Flat Bar: Width ≤ 120mm

Plate: Width ≤ 1000mm, length ≤ 2000mm

Surface Condition: Black or Polished Bright (h9)


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