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Characteristics for grade     65G   ( 65Г )

      Grade :     65G   ( 65Г )
      Substitute:   70, У8А, 70Г, 60С2А, 9ХС, 50ХФА, 60С2, 55С2
      Classification :   Spring structural steel
      Equivalent grades:   Go here



Chemical composition in % for grade   65G   ( 65Г )
C Si Mn Ni S P Cr Cu
0.62 - 0.70.17 - 0.370.9 - 1.2max   0.25max   0.035max   0.035max   0.25max   0.2


Temperature of critical points for grade   65G   ( 65Г ).
Ac1 = 721 ,      Ac3(Acm) = 745 ,       Ar3(Arcm) = 720 ,       Ar1 = 670 ,       Mn = 270


Mechanical properties under Т=20oС for grade   65G   ( 65Г )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Rolled stock, GOST 14959-79     980 785 8 30 Guenching and drawing
Sheet trick, GOST 1577-93     740   12    
Band cold-worked , GOST 2283-79     740-1180       
Band annealed , GOST 2283-79     640-740  10-15   


    Brinell hardness for     65G   ( 65Г )   (without heat treatment) ,       GOST 14959 HB 10 -1 = 285   MPa
    Brinell hardness for     65G   ( 65Г )   (heat treatment) ,     Rolled stock GOST 14959-79 HB 10 -1 = 241   MPa
    Brinell hardness for     65G   ( 65Г )   (annealing) ,     Sheet trick GOST 1577-93 HB 10 -1 = 229   MPa


Technological properties for grade   65G   ( 65Г )
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: predisposed


Physical properties for grade   65G   ( 65Г )
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 2.15   37 7850    
100 2.13 11.8 36 7830 490  
200 2.07 12.6 35 7800 510  
300 2 13.2 34   525  
400 1.8 13.6 32 7730 560  
500 1.7 14.1 31   575  
600 1.54 14.6 30   590  
700 1.36 14.5 29   625  
800 1.28 11.8 28   705  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     65G   ( 65Г )
Warning! Indicated both exact and nearest equivalents.
USAGermanyEnglandChinaBulgariaPoland
-DIN,WNrBSGBBDSPN
1066
1566
G15660
66Mn4
Ck67
080A67
65Mn
65G
65G


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

  65G   ( 65Г ) - Spring structural 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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