Metals -> Tool steel -> High speed tool steel Characteristics of the material R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ).
Material : R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ) Classification : High speed tool steel
Chemical composition in % of the material R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ) . C Si Mn Ni S P Cr Mo W V Co 0.84 - 0.92 max 0.5 max 0.5 max 0.4 max 0.03 max 0.03 3.8 - 4.3 4.8 - 5.3 5.7 - 6.7 1.7 - 2.1 4.7 - 5.2
Temperature of critical points of the grade R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ).
Ac1 = 840 , Ac3 (Acm ) = 875 , Ar3 (Arcm ) = 805 , Ar1 = 765
Mechanical properties under Ò=20o Ñ of the material R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - 850 510 12 14 180 As-delivered state
Brinell hardness of the material R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ) (annealing) , HB 10 -1 = 269 MPa
Physical properties of the material R6M5K5 ( R6M5K5, Ð6Ì5Ê5 ) . T E 10- 5 a 10 6 l r C R 10 9 Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m 20 2.2 8200 458 100 27 200 28 300 29 400 30 500 32 600 36 700 34 800 900 29 T E 10- 5 a 10 6 l r C R 10 9
Specification :
Mechanical properties : s â - Tensile strength , [MPa] s T - Yield stress, [MPa] d 5 - Specific elongation at fracture , [ % ] y - Reduction of area , [ % ] KCU - Impact strength , [ kJ / m2 ] HB - Brinell hardness , [MPa]
Physical properties : T - Test temperature , [Grade] E - Young modulus , [MPa] a - Coefficient of linear expansion
(range 20o - T ) , [1/Grade] l - Termal (heat) condition coefficient , [Watt/(m·Grade)] r - Density , [kg/m3 ] C - Specific heat
( range 20o - T ), [J/(kg·Grade)] R - Electrical resistance , [Ohm·m]
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