Metals -> Corrosion-resistant (stainless) steel -> Corrosion-resistant high-temperature steel Characteristics of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ).
Material : 14KH17N2 ( 14H17N2, 14Х17Н2 ) Substitute: 20Х17Н2 Classification : Corrosion-resistant high-temperature steel
Chemical composition in % of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ) . C Si Mn Ni S P Cr Ti Cu 0.11 - 0.17 max 0.8 max 0.8 1.5 - 2.5 max 0.025 max 0.03 16 - 18 max 0.2 max 0.3
Temperature of critical points of the grade 14KH17N2 ( 14H17N2, 14Х17Н2 ).
Ac1 = 720 , Ac3 (Acm ) = 830 , Ar1 = 700
Mechanical properties under Т=20o С of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ) .
Assortment
Dimension
Direct.
s в
s T
d 5
y
KCU
Heat treatment - mm - MPa MPa % % kJ / m2 - Forging to 1000 784 637 12 30 490 Guenching 980 - 1020o C, oil, Drawing 680 - 700o C, air, Bars 60 1080 835 10 30 490 Guenching 975 - 1040o C, oil, Drawing 275 - 350o C, air, Bars 60 835 635 16 55 750 Guenching 1000 - 1030o C, oil, Drawing 620 - 660o C, air,
Brinell hardness of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ) (quenching, tempering) , HB 10 -1 = 228 - 293 MPa Brinell hardness of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ) (annealing) , HB 10 -1 = 285 MPa
Physical properties of the material 14KH17N2 ( 14H17N2, 14Х17Н2 ) . 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 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, 14Х17Н2 ) . Weldability: hard weldability. Temper brittleness: predisposed
Specification :
Mechanical properties :
s в - Tensile strength , [MPa]
s T - Yield stress, [MPa]
d 5 - 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
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