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Metals -> Corrosion-resistant (stainless) steel -> Corrosion-resistant high-temperature steel

Characteristics of the material 14KH17N2   ( 14H17N2,   14172 ).

Material : 14KH17N2   ( 14H17N2,   14172 )
Substitute: 20172
Classification : Corrosion-resistant high-temperature steel


Chemical composition in % of the material 14KH17N2   ( 14H17N2,   14172 ) .
C Si Mn Ni S P Cr Ti Cu
0.11 - 0.17max   0.8max   0.81.5 - 2.5max   0.025max   0.0316 - 18max   0.2max   0.3


Temperature of critical points of the grade 14KH17N2   ( 14H17N2,   14172 ).
Ac1 = 720 ,      Ac3(Acm) = 830 ,       Ar1 = 700


Mechanical properties under =20o of the material 14KH17N2   ( 14H17N2,   14172 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Forging to 1000   784 637 12 30490Guenching 980 - 1020oC, oil, Drawing 680 - 700oC, air,
Bars 60   1080 835 10 30490Guenching 975 - 1040oC, oil, Drawing 275 - 350oC, air,
Bars 60   835 635 16 55750Guenching 1000 - 1030oC, oil, Drawing 620 - 660oC, air,


    Brinell hardness of the material   14KH17N2   ( 14H17N2,   14172 )   (quenching, tempering) ,       HB 10 -1= 228 - 293   MPa
    Brinell hardness of the material   14KH17N2   ( 14H17N2,   14172 )   (annealing) ,       HB 10 -1= 285   MPa


Physical properties of the material 14KH17N2   ( 14H17N2,   14172 ) .
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 1.97   20.9 7750   720
100   9.8 21.7     780
200   10.6 22.6     840
300 1.67 10.8 23.4     890
400   11 24.3     990
500 1.51 11.1 25.1     1040
600 1.36 11.8 25.9     1110
700   11 26.8     1130
800   10.7 28     1160
900   11.4 29.7     1170
1000   11.5       1180
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 14KH17N2   ( 14H17N2,   14172 ) .
  Weldability: hard weldability.
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

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