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Metals -> Tool steel -> Carbon tool steel

Characteristics of the material U9   ( U9,   9 ).

Material : U9   ( U9,   9 )
Substitute: 7, 8
Classification : Carbon tool steel


Chemical composition in % of the material U9   ( U9,   9 ) .
C Si Mn Ni S P Cr Cu
0.86 - 0.930.17 - 0.330.17 - 0.33max   0.25max   0.028max   0.03max   0.2max   0.25


Temperature of critical points of the grade U9   ( U9,   9 ).
Ac1 = 740 ,      Ac3(Acm) = 760 ,       Ar1 = 700 ,       Mn = 190


Mechanical properties under =20o of the material U9   ( U9,   9 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Band cold-rolled to 4   750   10   As-delivered state


    Brinell hardness of the material   U9   ( U9,   9 )   (annealing) ,       HB 10 -1= 192   MPa


Physical properties of the material U9   ( U9,   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 2.07     7745    
100   11.3 49 7726   253
200   12.1 48 7717   329
300   12.9 46 7690   418
400   13.6 43 7686   525
500   14.2 40 7655   646
600   14.7 37 7622   789
700   15.2 33 7586   943
800   14   7568   1155
900       7523   1198
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material U9   ( U9,   9 ) .
  Weldability: is not used.
 Flakes : not predisposed
Temper brittleness: not predisposed



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]

Weldability :
without limitations - welding is done without heating and subsequent heat treeting
limited weldability - welding is possible under heating up to 100-120 grade and subsequent heat treeting
hard weldability - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing

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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