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Characteristics of the material 40KHS   ( 40HS,   40 ).

Material : 40KHS   ( 40HS,   40 )
Substitute: 38, 35
Classification : Alloy structurall steel


Chemical composition in % of the material 40KHS   ( 40HS,   40 ) .
C Si Mn Ni S P Cr Cu
0.37 - 0.451.2 - 1.60.3 - 0.6max   0.3max   0.035max   0.0351.3 - 1.6max   0.3


Temperature of critical points of the grade 40KHS   ( 40HS,   40 ).
Ac1 = 763 ,      Ac3(Acm) = 810 ,       Ar3(Arcm) = 735 ,       Ar1 = 680 ,       Mn = 320


Mechanical properties under =20o of the material 40KHS   ( 40HS,   40 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 20   960 800 19 621220Guenching 900oC, oil, Drawing 640oC, water,
Bar 40   930 730 19 591080Guenching 900oC, oil, Drawing 640oC, water,
Bar 60   870 700 19 54880Guenching 900oC, oil, Drawing 640oC, water,


    Brinell hardness of the material   40KHS   ( 40HS,   40 )   (annealing) ,       HB 10 -1= 255   MPa


Physical properties of the material 40KHS   ( 40HS,   40 ) .
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 2.19     7740    
100   11.7   7720    
200   12.7 36 7690    
300   13.4        
400   14 35 7620    
500   14.4        
600   14.8 34 7540    
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 40KHS   ( 40HS,   40 ) .
  Weldability: hard weldability.
 Flakes : 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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