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Metals -> Structural steel -> Spring structural steel

Characteristics of the material 85   ( 85,   85 ).

Material : 85   ( 85,   85 )
Substitute: 70, 75, 80
Classification : Spring structural steel


Chemical composition in % of the material 85   ( 85,   85 ) .
C Si Mn Ni S P Cr Cu
0.82 - 0.90.17 - 0.370.5 - 0.8max   0.25max   0.035max   0.035max   0.25max   0.2


Temperature of critical points of the grade 85   ( 85,   85 ).
Ac1 = 720 ,      Ac3(Acm) = 730 ,       Ar1 = 700


Mechanical properties under Т=20oС of the material 85   ( 85,   85 ) .
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      1130 980 8 30 As-delivered state
Band annealed 0.08 - 3   750   10    


    Brinell hardness of the material   85   ( 85,   85 )   ,       HB 10 -1= 269 - 302   MPa


Physical properties of the material 85   ( 85,   85 ) .
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 1.91          


Technological properties of the material 85   ( 85,   85 ) .
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: not predisposed



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

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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