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Characteristics of the material 20KHN3   ( 20HN3,   203 ).

Material : 20KHN3   ( 20HN3,   203 )
Substitute: 20, 20, 38, 1522, 20
Classification : Alloy structurall steel


Chemical composition in % of the material 20KHN3   ( 20HN3,   203 ) .
C Si Mn Ni S P Cr Cu
0.17 - 0.240.17 - 0.370.3 - 0.62.75 - 3.15max   0.025max   0.0250.6 - 0.9max   0.3


Temperature of critical points of the grade 20KHN3   ( 20HN3,   203 ).
Ac1 = 730 ,      Ac3(Acm) = 810 ,       Ar3(Arcm) = 700 ,       Ar1 = 615 ,       Mn = 340


Mechanical properties under =20o of the material 20KHN3   ( 20HN3,   203 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 15   930 735 12 551080Guenching and drawing


    Brinell hardness of the material   20KHN3   ( 20HN3,   203 )   (annealing) ,       HB 10 -1= 255   MPa


Physical properties of the material 20KHN3   ( 20HN3,   203 ) .
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 2.12   36 7850   270
100 2.04 11.5 35 7830 494 300
200 1.94 11.7 34   507 350
300 1.88 12 33 7760 523 450
400 1.69 12.6 33   536 550
500 1.69 12.8 31   565 650
600 1.53 13.2 31 7660 586  
700 1.38 13.6 30   624  
800 1.32 11.2 28   703  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 20KHN3   ( 20HN3,   203 ) .
  Weldability: limited 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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