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Characteristics for grade     50   ( 50 )

      Grade :     50   ( 50 )
      Substitute:   45, 50Г, 50Г2, 55
      Classification :   High quality structural carbon steel
      Equivalent grades:   Go here



Chemical composition in % for grade   50   ( 50 )
C Si Mn Ni S P Cr Cu As
0.47 - 0.550.17 - 0.370.5 - 0.8max   0.3max   0.04max   0.035max   0.25max   0.3max   0.08


Temperature of critical points for grade   50   ( 50 ).
Ac1 = 725 ,      Ac3(Acm) = 760 ,       Ar3(Arcm) = 750 ,       Ar1 = 690 ,       Mn = 300


Mechanical properties under Т=20oС for grade   50   ( 50 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Rolled stock, GOST 1050-88 to 80   630 375 14 40 Normalizing
Rolled stock cold-worked , GOST 1050-88     660   6 30  
Rolled stock annealed , GOST 1050-88     560   12 40  
Sheet trick, GOST 1577-93 6 - 60   580   17   Annealing


    Brinell hardness for     50   ( 50 )   ,     Bar GOST 10702-78 HB 10 -1 = 217   MPa
    Brinell hardness for     50   ( 50 )   ,     Rolled stock GOST 1050-88 HB 10 -1 = 241   MPa
    Brinell hardness for     50   ( 50 )   ,     Rolled stock GOST 1050-88 HB 10 -1 = 255   MPa
    Brinell hardness for     50   ( 50 )   ,     Rolled stock GOST 1050-88 HB 10 -1 = 217   MPa
    Brinell hardness for     50   ( 50 )   ,     Rolled stock GOST 1050-88 HB 10 -1 = 207   MPa


Technological properties for grade   50   ( 50 )
  Weldability: hard weldability.
 Flakes : weakly predisposed
Temper brittleness: not predisposed


Physical properties for grade   50   ( 50 )
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 2.16   48 7810   272
100 2.13 11.2 48   487  
200 2.07 12 47   500  
300 2 12.8 44   517  
400 1.8 13.4 41   533  
500 1.71 13.9 38   559  
600 1.54 14.2 35   584  
700 1.36 14.5 31      
800 1.23 13.4 27      
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     50   ( 50 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyBelgiumSpainChinaSwedenBulgariaHungaryPolandRomaniaCzechiaAustraliaSouth Korea
-DIN,WNrJIS AFNORBSEN UNINBNUNEGBSSBDSMSZPNSTASCSNASKS
1049
1050
1055
G10490
G10500
G10550
1.0535
1.0540
1.1206
1.1213
C50
C50D
C50E
C55
Cf53
Ck50
S40C
S50C
S53C
S55C
2C50
C45E
C50E
C54
XC48H1
XC48H1TS
XC48TS
XC50
060A52
070M55
080M50
C50E
C55
1.0535
1.0540
1.1206
1.7035
41Cr4
C50
C50E
C53
C55
C50
C50E
C50R
C53
C55
C53
C50E
50
55
SM50
1655
1674
50
C50E
C50E
55
D50
OLC50AT
OLC50X
12051
12060
1050
SM50C

Types of delivery of grade   50   ( 50 )
B03 - Metal forming treatment. Forgings
В05 - Welding and cutting of metals., Soldering, riveting
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

  50   ( 50 ) - 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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