Metals -> High-temperature or heat-resistant steel and alloy -> Low alloy high-temperature steel Characteristics of the material 12KH2MFB ( 12H2MFB, 12Х2МФБ ).
Material : 12KH2MFB ( 12H2MFB, 12Х2МФБ ) Classification : Low alloy high-temperature steel
Chemical composition in % of the material 12KH2MFB ( 12H2MFB, 12Х2МФБ ) . C Si Mn Ni S P Cr Mo V Nb Cu 0.08 - 0.12 0.4 - 0.7 0.4 - 0.7 max 0.25 max 0.025 max 0.025 2.1 - 2.6 0.5 - 0.7 0.2 - 0.35 0.5 - 0.8 max 0.25
Mechanical properties under Т=20o С of the material 12KH2MFB ( 12H2MFB, 12Х2МФБ ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar longitudinal 507 302 36 78 1400 Drawing 860o C,
Physical properties of the material 12KH2MFB ( 12H2MFB, 12Х2МФБ ) . 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 2.2 7800 100 10.2 200 11.3 300 12.2 400 12.6 500 1.81 13.2 600 1.73 13.4 650 1.648 700 13.7 T E 10- 5 a 10 6 l r C R 10 9
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]
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