Metals -> Structural steel -> Alloy structurall steel Characteristics of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ).
Material : 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) Substitute: 15Õ2ÃÍ2ÒÐÀ, 20Õ2Í4À Classification : Alloy structurall steel
Chemical composition in % of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) . C Si Mn Ni S P Cr Mo Cu 0.14 - 0.2 0.17 - 0.37 0.25 - 0.55 4 - 4.4 max 0.025 max 0.025 1.35 - 1.65 0.3 - 0.4 max 0.3
Temperature of critical points of the grade 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ).
Ac1 = 700 , Ac3 (Acm ) = 810 , Ar3 (Arcm ) = 400 , Ar1 = 350 , Mn = 336
Mechanical properties under Ò=20o Ñ of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar Æ 15 1130 835 12 50 980 Guenching and drawing
Brinell hardness of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) (annealing) , HB 10 -1 = 269 MPa
Physical properties of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) . 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 2 7950 100 1.65 11.7 36 7930 200 1.41 12.2 36 7900 300 12.7 35 7860 400 1.39 13.1 35 7830 500 13.5 34 7800 600 13.9 33 7760 700 32 800 30 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 18KH2N4MÀ ( 18H2N4MÀ, 18Õ2Í4ÌÀ ) . Weldability: hard weldability. Flakes : predisposed Temper brittleness: not predisposed
Specification :
Mechanical properties : s â - 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
Top
© 2003 - 2009 All rights reserved. About program.
Èíôîðìàöèÿ âçÿòà ñ ñàéòà Ìàðî÷íèê ñòàëè è ñïëàâîâ
© 2002 - 2009 Ìîññïåöñòàëü. Âñå ïðàâà çàùèùåíû
