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Material SKH 55 HSS Cobalt


Product  : SKH 55 HSS Cobalt
Kategori : High Speed Steel Cobalt (HSS-Co)
Standard: JIS G 4403
Grades   : SKH 55

Equivalent
ISORAPID S705, AISI M41, AISI M35, Thyssenkrupp 3243, ASSAB ASP 60, DIN HS6-5-2-5, EN 1.3243, UNS T11341, ASTM A600

Characteristic
SKH 55 is similar to SKH 51 but with 5% cobalt added.
High Speed Steel Cobalt (HSS-Co)
Better hot hardness and wear resistance
Suitable for heat treatment up to 66 HRC
Excellent cutting performance

Availability
Roundbar
Flat

Chemical Composition
Type C Si Mn Cr Mo V W Co
S705 0.92 0.40 0.30 4.10 5.00 1.90 6.20 4.80
SKH55 0.87-0.95 0.45 Max 0.40 Max 3.8-4.5 4.7-5.2 1.7-2.1 5.9-6.7 4.5-5.0


Mechanical Properties
Properties
SKH55
Tensile Strength (MPa) 1158
Yield Strength (MPa) 1034
Elongation (%) 15
Hardness (HB) Max 335
Supplied Condition Annealed

Physical Properties
Properties
SKH55
Density (×1000 kg/m3) 7.7-8.0
Elastic Modulus (GPa) 190-210
Thermal Conductivity (W/m-K) 24
Specific Heat (J/kg-K) 420
Electrical Resistivity (Ohm.mm2/m) 0.49

Application
Hobs, twist drills, broaches, taps, reamers, saws, wood working tools and cold work tools

Related Grade
SKH 2 | SKH 3 | SKH 4 | SKH 10| SKH 40 | SKH 50 | SKH 54 | SKH 56 |



Related Steel:

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