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Characteristics of the material 30KHN3   ( 30HN3,   303 ).

Material : 30KHN3   ( 30HN3,   303 )
Substitute: 3022, 252, 342
Classification : Alloy structurall steel


Chemical composition in % of the material 30KHN3   ( 30HN3,   303 ) .
C Si Mn Ni S P Cr Cu
0.27 - 0.330.17 - 0.370.3 - 0.62.75 - 3.15max   0.025max   0.0250.6 - 0.9max   0.3


Temperature of critical points of the grade 30KHN3   ( 30HN3,   303 ).
Ac1 = 700 ,      Ac3(Acm) = 800 ,       Ar3(Arcm) = 680 ,       Ar1 = 610 ,       Mn = 305


Mechanical properties under =20o of the material 30KHN3   ( 30HN3,   303 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar 5   1670 1420 13 50660Guenching 850oC, oil, Drawing 200oC, air,
Bar 20   1670 1370 12 45490Guenching 850oC, oil, Drawing 200oC, air,
Bar 25   980 785 10 50780Guenching 820oC, oil, Drawing 530oC, water,


    Brinell hardness of the material   30KHN3   ( 30HN3,   303 )   (annealing) ,       HB 10 -1= 241   MPa


Physical properties of the material 30KHN3   ( 30HN3,   303 ) .
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 2.15   34 7850   268
100 2.07 10.8 35 7830 494 317
200 1.95 11.5 36 7800 504 387
300 1.87 12.2 36 7770 518 469
400 1.75 12.8 36 7730 536 567
500 1.71 13.2 35 7700 558 681
600   13.5 31 7670 587 817
700     28 7690 657 981
800     27 7650 703  
900       7600 695  
1000         687  
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 30KHN3   ( 30HN3,   303 ) .
  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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