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Characteristics for grade     22K   ( 22К )

      Grade :     22K   ( 22К )
      Substitute:   25К
      Classification :   High quality structural carbon steel
      Equivalent grades:   Go here



Chemical composition in % for grade   22K   ( 22К )
C Si Mn Ni S P Cr Cu
0.19 - 0.260.17 - 0.40.7 - 1max   0.3max   0.035max   0.04max   0.3max   0.3


Temperature of critical points for grade   22K   ( 22К ).
Ac1 = 724 ,      Ac3(Acm) = 845 ,       Ar3(Arcm) = 815 ,       Ar1 = 682


Mechanical properties under Т=20oС for grade   22K   ( 22К )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Sheet 60 - 90   440      600Normalizing 940 - 960oC,Drawing 630 - 650oC,Cooling air, 65 oC/h,
Sheet, GOST 5520-79     430-590255-26522  590 


Technological properties for grade   22K   ( 22К )
  Weldability: limited weldability.
 Flakes : not predisposed
Temper brittleness: not predisposed


Physical properties for grade   22K   ( 22К )
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 2.11   51.7 7859   173
100 2.08 11.75 51 7834 470 219
200 2.05 12.2 48.5 7803 483 292
300 2 12.8 44.4 7770   381
400 1.91 13.2 42.7 7736 525 487
500 1.8 13.5 39.3 7699 571 601
600 1.65 13.85 35.6 7659   758
700   14.6 31.9 7617   925
800   12.7 25.9 7624   1094
900   12.4 26.4 7600   1135
1000   13.4 27.7 7548   1167
1100   14.2 28.5 7496   1194
1200   14.8 29.8     1219
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     22K   ( 22К )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanEngland
-DIN,WNrJIS BS
1022
K02700
20Mn5
SMnC420
120M19


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

  22K   ( 22К ) - High quality structural carbon 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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