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Characteristics for grade     20kp   ( 20кп )

      Grade :     20kp   ( 20кп )
      Substitute:   15кп
      Classification :   High quality structural carbon steel
      Equivalent grades:   Go here



Chemical composition in % for grade   20kp   ( 20кп )
C Si Mn Ni S P Cr Cu As
0.17 - 0.24max   0.070.25 - 0.5max   0.3max   0.04max   0.035max   0.25max   0.3max   0.08


Temperature of critical points for grade   20kp   ( 20кп ).
Ac1 = 735 ,      Ac3(Acm) = 850 ,       Ar3(Arcm) = 835 ,       Ar1 = 680


Mechanical properties under Т=20oС for grade   20kp   ( 20кп )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Sheet heat-treatment, GOST 4041-71 4 - 14   340-490  28    
Pipe, GOST 10705-80     372 225 22    
Steel cold-drawn , GOST 10702-78     490   7 45  
Strip, GOST 1577-93 6 - 60   380 225 27 55 Normalizing


    Brinell hardness for     20kp   ( 20кп )   ,     Sheet GOST 4041-71 HB 10 -1 = 127   MPa
    Brinell hardness for     20kp   ( 20кп )   ,     Sheet trick GOST 1577-93 HB 10 -1 = 156   MPa


Technological properties for grade   20kp   ( 20кп )
  Weldability: without limitations.
 Flakes : not predisposed
Temper brittleness: not predisposed


Physical properties for grade   20kp   ( 20кп )
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 2.12          
100 2.08 12.3 51 7834 486 219
200 2.03 13.1 49 7803 498 292
300 1.97 13.8 44 7770 514 381
400 1.89 14.3 43 7736 533 487
500 1.77 14.8 39 7699 555 601
600 1.63 15.1 36 7659 584 758
700 1.4 15.2 32 7617 636 925
800     26 7624 703 1094
900     26 7600 703 1135
1000         695  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     20kp   ( 20кп )
Warning! Indicated both exact and nearest equivalents.
USAGermanyEuropean
-DIN,WNrEN
1020
1023
G10200
G10230
M1020
M1023
Cq22
1.1152
C20E2C

Types of delivery of grade   20kp   ( 20кп )
В22 - Graded and shaped rolling
B23 - Sheets and Strips
B24 - Ribbons
В32 - Graded and shaped rolling
B33 - Sheets and Strips
B34 - Ribbons
В62 - Steel pipes and connecting parts to them
В71 - Low-carbon steel wire
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

  20kp   ( 20кп ) - 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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