Database of Steel and Alloy (Marochnik)

splav-kharkov.com/en

  Home     European steel grades     Steel and Alloy     Search     Equivalent grades     GOST Standards     Grading     Contacts  

    YOU HERE:   Steel and Alloy   ->   Tool steel

Characteristics for grade     U8 ( У8 )

      Grade :     U8 ( У8 )
      Substitute:   У7, У10
      Classification :   Carbon tool steel
      Equivalent grades:   Go here



Chemical composition in % for grade   U8 ( У8 )
C Si Mn Ni S P Cr Cu
0.75 - 0.840.17 - 0.330.17 - 0.33max   0.25max   0.028max   0.03max   0.2max   0.25


Temperature of critical points for grade   U8 ( У8 ).
Ac1 = 720 ,       Ar1 = 700 ,       Mn = 245


Mechanical properties under Т=20oС for grade   U8 ( У8 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Blank 6   1420 1230 10 37 Guenching 780oC, oil, Drawing 400oC,
Band annealed 1.5   750   10    


    Brinell hardness for     U8 ( У8 )   (annealing) ,       GOST 1435-99 HB 10 -1= 187   MPa


Technological properties for grade   U8 ( У8 )
  Weldability: is not used.
 Flakes : not predisposed
Temper brittleness: not predisposed


Physical properties for grade   U8 ( У8 )
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 2.09     7839    
100 2.05 11.4 49 7817 477 230
200 1.99 12.2 46 7786 511 305
300 1.92 13 42 7752 528 395
400 1.85 13.7 38 7714 548 491
500 1.75 14.3 35 7676 565 625
600 1.66 14.8 33 7638 594 769
700   15.2 30 7600 624 931
800   14.5 24 7852 724 1129
900           1165
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     U8 ( У8 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyChinaPolandCzechiaAustria
-DIN,WNrJIS AFNORBSEN UNIGBPNCSNONORM
W1-7
1.1625
C80W1
C80W2
SK5
SK6
SKC3
C90E2U
Y1-70
Y1-80
Y180
Y90
BW1A
BW1B
CT80
C80KU
T8
N8
19152
K980


Specification :
Mechanical properties :
sв - 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/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

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

  U8 ( У8 ) - Carbon tool steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

Database of Steel and Alloy (Marochnik)     ©   2003 - 2014   All rights reserved.       About program
The entire risk as to use of the Database of Steel and Alloy (Marochnik) content is assumed by you the user