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Characteristics for grade     U12А   ( У12А )



      Grade :     U12А   ( У12А )
      Classification :   Carbon tool steel
      Equivalent grades:   Go here



Chemical composition in % for grade   U12А   ( У12А )
C Si Mn Ni S P Cr Cu
1.1 - 1.290.17 - 0.330.17 - 0.28max   0.25max   0.018max   0.025max   0.2max   0.25


Temperature of critical points for grade   U12А   ( У12А ).
Ac1 = 730 ,      Ac3(Acm) = 820 ,       Ar1 = 700 ,       Mn = 200


Mechanical properties under Т=20oС for grade   U12А   ( У12А )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Band annealed 0.08 - 3   750   10    


    Brinell hardness for     U12А   ( У12А )   (annealing) ,       GOST 1435-99 HB 10 -1 = 217   MPa


Physical properties for grade   U12А   ( У12А )
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       7810    


Equivalent steels for grade     U12А   ( У12А )
Warning! Indicated both exact and nearest equivalents.
JapanFranceEnglandItalyBulgariaHungaryPolandCzechia
JIS AFNORBSUNIBDSMSZPNCSN
SK2
C120E3U
BW1C
C120KU
U12A
S121
S122
N12E
19221



Types of delivery of grade   U12А   ( У12А )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
B33 - Sheets and Strips
B34 - Ribbons
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]

  U12А   ( У12А ) - 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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