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Metals -> Structural steel -> Spring structural steel

Characteristics of the material 65G   ( 65G,   65 ).

Material : 65G   ( 65G,   65 )
Substitute: 70, 8, 70, 602, 9, 50, 602, 552
Classification : Spring structural steel


Chemical composition in % of the material 65G   ( 65G,   65 ) .
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 of the grade 65G   ( 65G,   65 ).
Ac1 = 721 ,      Ac3(Acm) = 745 ,       Ar3(Arcm) = 720 ,       Ar1 = 670 ,       Mn = 270


Mechanical properties under =20o of the material 65G   ( 65G,   65 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      980 785 8 30 As-delivered state
Band annealed to 1.5   650   15    


    Brinell hardness of the material   65G   ( 65G,   65 )   (annealing) ,       HB 10 -1= 241   MPa
    Brinell hardness of the material   65G   ( 65G,   65 )   (without heat treatment) ,       HB 10 -1= 285   MPa


Physical properties of the material 65G   ( 65G,   65 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
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


Technological properties of the material 65G   ( 65G,   65 ) .
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: predisposed



Specification :
Mechanical properties :
s - 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/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

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

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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