Metals -> High-temperature or heat-resistant steel and alloy -> Low alloy high-temperature steel Characteristics of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ).
Material : 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) Classification : Low alloy high-temperature steel
Chemical composition in % of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) . C Si Mn Ni S P Cr Mo V Cu 0.08 - 0.15 0.17 - 0.37 0.4 - 0.7 max 0.3 max 0.025 max 0.03 0.9 - 1.2 0.25 - 0.35 0.15 - 0.3 max 0.2
Temperature of critical points of the grade 12KH1MF ( 12H1MF, 12Õ1ÌÔ ).
Ac1 = 760 , Ac3 (Acm ) = 890 , Ar3 (Arcm ) = 825 , Ar1 = 730 , Mn = 430
Mechanical properties under Ò=20o Ñ of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar longitudinal 480 260 21 55 1000 Normalizing 960 - 980o C,Drawing 740 - 760o C, Forging longitudinal 480 260 20 50 600 Normalizing and high drawing
Brinell hardness of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) (normalize) , HB 10 -1 = 123 - 179 MPa Brinell hardness of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) (hot-rolled, annealing) , HB 10 -1 = 217 MPa
Physical properties of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) . 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 1.98 7800 230 100 1.93 12.4 44 7780 278 200 1.88 13 44 7750 343 300 1.83 13.6 42 7720 430 400 1.75 14 40 7680 532 500 1.67 14.4 37 7640 647 600 1.57 14.7 35 7600 775 700 1.51 14.9 32 7570 962 800 14.8 28 7540 1087 900 12 28 7560 1130 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 12KH1MF ( 12H1MF, 12Õ1ÌÔ ) . Weldability: limited weldability.
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
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