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High Speed Steel

 

  02-295-1000
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 S705

Bohler S705: Equivalent* SKH55, M41, 1.3243, MH55, YXM4

 

 Chemical composition (average %)

  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

 

Material characteristic and use

Properties Cobalt alloyed, tungsten-molybdenum high speed steel possessing high hardness, 
excellent cutting properties, high red hardness and good toughness.
BOHLER S705 is also available in the special grade ISORAPID for heavy duty tools.
   
Application Turning and planing tools of all types, milling cutters, taps, twist drills, 
woodworking tools, cold work tools.
   
Hardness after tempering 64-66 HRC
   
As-supplied condition Annealed: max. 280 HB

 

Physical characteristics

    Temperature
    20 ºC 100 ºC 200 ºC 300 ºC 400 ºC 500 ºC 600 ºC 700 ºC
Density (kg/dm3)  7.90              
Thermal conductivity W/(m·K)  21.0              
Specific heat J/(kg·K)  420              
Electrical resistivity Ohm·mm2/m  0.49              
Modulus of elasticity N/mm2  224x103              
Thermal expansion 10-6m/(m·K)    11.5  11.7  12.2  12.4  12.7 13.0  12.9

* Chemical composition is only reference and might not be the same

Our Company

Tel  : 66(0) 2295-1000-8,66(0) 2295-1901-6
Fax  : 66(0) 2295 1009 , 66(0) 2683 0943 , 66(0) 2683 0944
Addr. : 42, 48 Rama 3 Road, Soi 53, Yannawa, Bangkok 10120
Tel. : 66(0) 38-080-400 , 66(0) 38-080-411
Fax : 66(0) 38-080-409 , 66(0) 38-080-419 , 66(0) 38-080-429
Addr.          

: 155 Moo 14 Sukhumvit Road (Old Route) Bang Pakong Tambon    Bang Pakong District Chachoengsao Province

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