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Characteristics for grade     20   ( 20 )

      Grade :     20   ( 20 )
      Substitute:   15, 25
      Classification :   High quality structural carbon steel
      Equivalent grades:   Go here



Chemical composition in % for grade   20   ( 20 )
C Si Mn Ni S P Cr Cu As
0.17 - 0.240.17 - 0.370.35 - 0.65max   0.3max   0.04max   0.035max   0.25max   0.3max   0.08


Temperature of critical points for grade   20   ( 20 ).
Ac1 = 724 ,      Ac3(Acm) = 845 ,       Ar3(Arcm) = 815 ,       Ar1 = 682


Mechanical properties under Т=20oС for grade   20   ( 20 )
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 hot strain, GOST 550-75     431 255 22 50780 
Pipe, GOST 8731-87     412 245 21    
Pipe, GOST 10705-80     372 225 22    
Rolled stock, GOST 1050-88 to 80   410 245 25 55 Normalizing
Rolled stock cold-worked , GOST 1050-88     490   7 40  
Rolled stock annealed , GOST 1050-88     390   21 50  
Band annealed , GOST 2284-79     310-540  18    
Band cold-worked , GOST 2284-79     490-830       


    Brinell hardness for     20   ( 20 )   (annealing) ,       GOST 1050-88 HB 10 -1 = 163   MPa
    Brinell hardness for     20   ( 20 )   (cold-drawn, cold-worked) ,       GOST 1050-88 HB 10 -1 = 207   MPa
    Brinell hardness for     20   ( 20 )   ,     Sheet GOST 4041-71 HB 10 -1 = 127   MPa
    Brinell hardness for     20   ( 20 )   ,     Pipe GOST 550-75 HB 10 -1 = 156   MPa
    Brinell hardness for     20   ( 20 )   ,     Pipe GOST 8731-87 HB 10 -1 = 156   MPa
    Brinell hardness for     20   ( 20 )   ,     Sheet trick GOST 1577-93 HB 10 -1 = 156   MPa


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


Physical properties for grade   20   ( 20 )
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 2.13   52 7859    
100 2.03 11.6 50.6 7834 486 219
200 1.99 12.6 48.6 7803 498 292
300 1.9 13.1 46.2 7770 514 381
400 1.82 13.6 42.8 7736 533 487
500 1.72 14.1 39.1 7699 555 601
600 1.6 14.6 35.8 7659 584 758
700   14.8 32 7617 636 925
800   12.9   7624 703 1094
900       7600 703 1135
1000         695  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     20   ( 20 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyBelgiumSpainChinaSwedenBulgariaHungaryPolandRomaniaCzechiaAustraliaSwitzerlandSouth Korea
-DIN,WNrJIS AFNORBSEN UNINBNUNEGBSSBDSMSZPNSTASCSNASSNVKS
1020
1023
1024
G10200
G10230
H10200
M1020
M1023
1.0402
1.0405
1.1151
C22
C22E
C22R
Ck22
Cm22
Cq22
St35
St45-8
S20C
S20CK
S22C
STB410
STKM12A
STKM12A-S
STKM13B
STKM13B-W
1C22
2C22
AF42
AF42C20
C20
C22
C22E
C25E
XC15
XC18
XC25
050A20
055M15
070M20
070M26
1449-22CS
1449-22HS
1C22
22HS
430
C22
C22E
1.0402
1.1151
1.1152
2C22
C20E2C
C22
C22E
C18
C20
C21
C22
C22E
C22R
C25
C25E
C25-1
C25-2
1C22
C22
C25k
F.112
F.1120
20
20G
20R
20Z
1450
20
C22
C22E
A45.47
C22E
20
K18
OLC20
OLC20X
12022
12024
1020
M1020
Ck22
SM20C
SM20CK
SM22C

Types of delivery of grade   20   ( 20 )
B03 - Metal forming treatment. Forgings
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
B76 - Metal nets


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

  20   ( 20 ) - 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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