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Characteristics for grade     А30   ( А30 )

      Grade :     А30   ( А30 )
      Substitute:   А40, А40Г
      Classification :   Rolled steel of improved and high cutting machinability
      Equivalent grades:   Go here



Chemical composition in % for grade   А30   ( А30 )
C Si Mn S P Cu
0.26 - 0.350.15 - 0.350.7 - 10.08 - 0.15max   0.06max   0.25


Temperature of critical points for grade   А30   ( А30 ).
Ac1 = 735 ,      Ac3(Acm) = 845 ,       Ar3(Arcm) = 820 ,       Ar1 = 680


Mechanical properties under Т=20oС for grade   А30   ( А30 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Rolled stock hotrolled, GOST 1414-75     510   15 25  
Rolled stock, GOST 1414-75     540   6    


    Brinell hardness for     А30   ( А30 )   ,     Rolled stock GOST 1414-75 HB 10 -1 = 185   MPa
    Brinell hardness for     А30   ( А30 )   ,     Rolled stock GOST 1414-75 HB 10 -1 = 223   MPa


Technological properties for grade   А30   ( А30 )
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: not predisposed


Equivalent steels for grade     А30   ( А30 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalySpainChinaSwedenPolandRomaniaCzechia
-DIN,WNrJIS AFNORBSEN UNIUNEGBSSPNSTASCSN
1126
1140
1.0726
35S20
SUM4
35MF4
35MF6
212M36
1.0726
35S20
CF35SMn10
F.210G
Y30
Y35
1957
1957-03
A35
AUT30
11140


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]

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

  А30   ( А30 ) - Rolled steel of improved and high cutting machinability: 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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