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Characteristics for grade     85   ( 85 )

      Grade :     85   ( 85 )
      Substitute:   70, 75, 80
      Classification :   Spring structural steel
      Equivalent grades:   Go here



Chemical composition in % for grade   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 for grade   85   ( 85 ).
Ac1 = 720 ,      Ac3(Acm) = 730 ,       Ar1 = 700


Mechanical properties under Т=20oС for grade   85   ( 85 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Rolled stock, GOST 14959-79     1130 980 8 30 Guenching 820oC, oil, Drawing 470oC,
Band annealed , GOST 2283-79     740   10    
Band cold-worked , GOST 2283-79     740-1180       


    Brinell hardness for     85   ( 85 )   (without heat treatment) ,     Rolled stock GOST 14959-79 HB 10 -1 = 302   MPa
    Brinell hardness for     85   ( 85 )   (heat treatment) ,     Rolled stock GOST 14959-79 HB 10 -1 = 269   MPa


Technological properties for grade   85   ( 85 )
  Weldability: is not used.
 Flakes : weakly predisposed
Temper brittleness: not predisposed


Physical properties for grade   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          


Equivalent steels for grade     85   ( 85 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyChinaBulgariaPolandRomaniaCzechia
-DIN,WNrJIS AFNORBSEN UNIGBBDSPNSTASCSN
1080
1084
1085
1086
A68
G10840
G10850
G10860
1.1269
C85E
C86D
Ck85
D85-2
SK5-CSP
SUP3
C90RR
FMR86
XC90
80CS
80HS
1.0616
2CD85
2CS85
C86D
CS85
3CD85
C85
C90
85
85
85
D85
OLC85A
12090

Types of delivery of grade   85   ( 85 )
В05 - Welding and cutting of metals., Soldering, riveting
В22 - Graded and shaped rolling
B23 - Sheets and Strips
В32 - Graded and shaped rolling
B33 - Sheets and Strips
B34 - Ribbons
В72 - Medium-high and high-carbon steel wire


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

  85   ( 85 ) - 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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