Database of Steel and Alloy (Marochnik)

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Metals -> Tool steel -> High speed tool steel

Characteristics of the material R9   ( R9,   9 ).

Material : R9   ( R9,   9 )
Substitute: 18
Classification : High speed tool steel


Chemical composition in % of the material R9   ( R9,   9 ) .
C Si Mn Ni S P Cr Mo W V Co
0.85 - 0.95max   0.5max   0.5max   0.4max   0.03max   0.033.8 - 4.4max   18.5 - 9.52.3 - 2.7max   0.5


Temperature of critical points of the grade R9   ( R9,   9 ).
Ac1 = 820 ,      Ac3(Acm) = 870 ,       Ar3(Arcm) = 780 ,       Ar1 = 740 ,       Mn = 180


Mechanical properties under =20o of the material R9   ( R9,   9 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      840 490 10 29260As-delivered state


    Brinell hardness of the material   R9   ( R9,   9 )   (annealing) ,       HB 10 -1= 255   MPa


Physical properties of the material R9   ( R9,   9 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
20 2.2     8300   380
100     23     417
200     25     505
300     26     600
400     28     695
500     30     790
600     31     900
700           1020
800           1160
900           1170
T E 10- 5 a 10 6 l r C R 10 9



Specification :
Mechanical properties :
s - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - 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/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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