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Characteristics for grade     50KHFА   ( 50ХФА )

      Grade :     50KHFА   ( 50ХФА )
      Substitute:   60С2А, 50ХГФА, 9ХС
      Classification :   Spring structural steel
      Equivalent grades:   Go here



Chemical composition in % for grade   50KHFА   ( 50ХФА )
C Si Mn Ni S P Cr V Cu
0.46 - 0.540.17 - 0.370.5 - 0.8max   0.25max   0.025max   0.0250.8 - 1.10.1 - 0.2max   0.2


Temperature of critical points for grade   50KHFА   ( 50ХФА ).
Ac1 = 752 ,      Ac3(Acm) = 788 ,       Ar3(Arcm) = 746 ,       Ar1 = 688 ,       Mn = 300


Mechanical properties under Т=20oС for grade   50KHFА   ( 50ХФА )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar     1300 1100 10 45 Guenching and drawing
Rolled stock, GOST 14959-79     1270 1080 8 35 Guenching and drawing
Band annealed , GOST 2283-79 0.1 - 4   880   8    
Band cold-worked , GOST 2283-79 0.1 - 4   780-1180       


    Brinell hardness for     50KHFА   ( 50ХФА )   (without heat treatment) ,     Rolled stock GOST 14959-79 HB 10 -1 = 302   MPa
    Brinell hardness for     50KHFА   ( 50ХФА )   (heat treatment) ,     Rolled stock GOST 14959-79 HB 10 -1 = 269   MPa


Technological properties for grade   50KHFА   ( 50ХФА )
  Weldability: is not used.
 Flakes : not predisposed
Temper brittleness: weakly predisposed


Physical properties for grade   50KHFА   ( 50ХФА )
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 2.18   40 7800   320
100 2.15 11.7 39 7780 490  
200 2.1 12.2 38 7750 505  
300 2 12.9 37 7720 510  
400 1.88 13.5 36 7680 530  
500 1.78 14 33 7650 560  
600 1.6 14.4 31 7610 580  
700 1.42 14.6 29   620  
800 1.32 13.1 28   700  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     50KHFА   ( 50ХФА )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalyBelgiumSpainChinaSwedenBulgariaHungaryPolandRomaniaCzechiaAustraliaSouth Korea
-DIN,WNrJIS AFNORBSEN UNINBNUNEGBSSBDSMSZPNSTASCSNASKS
6145
6150
G41500
G61500
H61500
1.8159
50СrV4
51СrV4
GS-50CrV4
SCM445H
SUP10
SUP10-CSP
50CrV4
50CrV4RR
50СrV4
51СrV4
51CrV4
735A50
735A51
735A54
735h51
50СrV4
51CrMnV4
51СrV4
48Si7
50CrV4
51CrMnV4KU
50CrV4
51CrV4
F.1430
50СrVA
2230
50ChFA
51CrV4
51CrV4
CrV3Z
SZ2
50HF
51VCr11A
51VMnCr11
51VMnCr11AT
15260
6150
6150H
SPS6


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

  50KHFА   ( 50ХФА ) - 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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