SKH9 HSS

E Steel Sdn Bhd are Malaysia steel supplier/stockist providing raw materials to the wide arrays of engineering industries/sectors.

We supply full range of Plastic mould Steel plate, Plastic Mould steel round bar , Carbon steel plate, Carbon steel round Bar,  Hot work steel , Special Steel ,Tool Steel ,Corrosion resistant Steel.

 

 

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Description

SKH9 High Speed Steel, SKH51, M2

SKH9 High Speed Steel (M2) is a tungsten-molybdenum high speed steel with a well balanced composition suitable for a wide variety of applications.  World wide, the M2 type is by far the most popular high speed steel having replaced T1 high speed in most applications because of its superior properties and relative economy.

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

COMPOSITION

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

 

Common M2 Tool Steel Related Specifications and Equivalents

Country USA German Japan
Standard ASTM A600 DIN EN ISO 4957 JIS G4403
Grades M2 1.3343 SKH51

 

PHYSICAL PROPERTIES

  • Density:294 lb/in3 (8138 kg/m3)
  • Specific Gravity:14
  • Modulus of Elasticity:30 x 106 psi (207GPa)
  • Machinability:50-60% 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

 

HEAT TREATING INSTRUCTIONS

HARDENING HSS SKH9 / SKH51

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).

Tempering: Temper immediately after quenching. Typical tempering range is 1025-1050°F (552-566°C). Hold at temperature for 2 hours, then air cool to ambient temperature. Double tempering is required. For large cross sections, and especially for blanks from which tools will be cut by wire EDM, triple tempering is strongly recommended.

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OUR MOTTO : ” WHY BUY A FULL BAR OR SHEET WHEN YOU JUST NEED A SMALL VOLUME?

Our specialty is to provide wide range of alloy steel with no minimum order.( no MOQ )