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M2 1.3343 SKH9

Home>Products>High Speed Steel>M2 1.3343 SKH9

HSS M2 1.3343 SK H9---ROUND BAR

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Specifications

M2 High Speed Steel (M2) /1.3343 steel is a general purpose molybdenum high speed steel. 1.3343 steel is characterized by balanced combination of abrasion resistance, toughness and good red hardness. Due to its comparatively low carbon content, 1.3343steel has an excellent combination of toughness properties and abrasion resistance when properly hardened and tempered. 


Applications:

Standard high-speed steel grade.

High toughness and good cutting power owing to its well-balanced composition, making it suitable for a wide variety of applications.

For all metal-cutting tools for roughing or finishing, such as twist drills, all kinds of milling cutters, screw taps, screw dies, broaches,

reamers, countersinks, chasers, segments for circular saws, shaping tools and woodworking tools.

Also highly suitable for cold-forming tools, such as cold extrusion rams and dies, as well as for cutting and precision cutting tools,

plastics moulds with elevated wear resistance and screws. 


Quick Detail:

M2/1.3343 ROUND BAR 


COMPOSITION

        C       Mn       Si       Cr       W      Mo        V
      0.85      0.28     0.30      4.15      6.15      5.00      1.85


RELATIVE PROPERTIES

Coefficient of Thermal Expansion(65-66 HRC)
Temperature︒Fin/in︒F×10-6Temperature︒Cmm/mm︒C×10-6
70-200
5.6921-9310.23
70-4006.0921-20410.95
70-6006.4221-31611.55
70-8006.6721-42712
70-10006.9721-35812.54


PHYSICAL PROPERTIES

· Density: 0.294 lb/in3 (8138 kg/m3)

· Specific Gravity: 8.14

· Modulus of Elasticity: 30 x 106 psi (207GPa)

· Machinability: 50-60% of a 1% carbon steel


HEAT TREATING INSTRUCTIONS

HARDENING

CRITICAL TEMPERATURE:
Ac1: 1530°F(832℃)Ac3: 1610°F(877℃)
AR1: 1430°F(777℃)AR3: 1380°F(749℃)


Preheating:To minimize distortion and stresses in large or complex tools use a double preheat. Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1100°F (593°C) equalize, then heat to 1450-1550°F (788-843°C). For normal tools, use only the second temperature range as a single preheating treatment.


Austenitizing (High Heat):Heat rapidly from the preheat.

For Cutting Tools:

Furnace: 2200-2250°F (1204-1232°C)

Salt: 2175-2225°F (1191-1218°C)

To maximize toughness, use the lowest temperature.

To maximize hot hardness, use the highest temperature.

For punches, dies, and tools that require maximum

toughness without hot hardness:

Furnace: 2075-2175°F (1175-1191°C)

Salt: 2050-2150°F (1121-1177°C)


Quenching:Pressurized gas, warm oil, or salt. For pressurized gas, a rapid quench rate to below 1000°F (538°C) is critical to obtain the desired properties. For oil, quench until black, about 900°F (482°C), then cool in still air to 150 -125°F (66-51°C). For salt maintained at 1000-1100°F (538-593°C), equalize, then cool in still air to 150 -125°F (66-51°C).


ItemDimension (mm)Process       Delivery condition



Round Bar

DIA1.0 - 30Cold-drawing / Centerless grindingBright & Anneal
DIA20 - 80PeelingBright & Anneal
DIA 13-180Hot RolledBlack surface & Anneal
DIA 70 - 400Hot RolledBlack surface & Anneal


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