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Characteristics for grade     U12   ( У12 )



      Grade :     U12   ( У12 )
      Substitute:   У10, У11
      Classification :   Carbon tool steel
      Equivalent grades:   Go here



Chemical composition in % for grade   U12   ( У12 )
C Si Mn Ni S P Cr Cu
1.1 - 1.290.17 - 0.330.17 - 0.33max   0.25max   0.028max   0.03max   0.2max   0.25


Temperature of critical points for grade   U12   ( У12 ).
Ac1 = 730 ,      Ac3(Acm) = 820 ,       Ar1 = 700 ,       Mn = 200


Mechanical properties under Т=20oС for grade   U12   ( У12 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Band annealed 0.08 - 3   750   10    
Steel     590-690325 28 50270Annealing


    Brinell hardness for     U12   ( У12 )   (annealing) ,       GOST 1435-99 HB 10 -1 = 217   MPa


Technological properties for grade   U12   ( У12 )
  Weldability: is not used.
 Flakes : not predisposed
Temper brittleness: not predisposed


Physical properties for grade   U12   ( У12 )
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     7830    
100 2.05 10.5 45 7809 469 252
200 2 11.8 43 7781 503 333
300 1.93 12.6 40 7749 519 430
400 1.85 13.4 37 7713 536 540
500 1.78 13.1 35 7675 553 665
600 1.66 14.8 32 7634 720 802
700   15.3 28 7592 611 964
800   15 24 7565 712 1152
900   16.3 25 7489 703 1196
1000   16.8     699  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     U12   ( У12 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyChinaBulgariaHungaryPolandCzechiaAustria
-DIN,WNrJIS AFNORBSEN UNIGBBDSMSZPNCSNONORM
W1-11-1/2
1.1654
C110W2
SK2
C120E3U
Y2120
BW1C
CT120
C120KU
T11
U12
S121
S122
N12
19221
K990



Types of delivery of grade   U12   ( У12 )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
B33 - Sheets and Strips
В72 - Medium-high and high-carbon steel wire


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

  U12   ( У12 ) - 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

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