Metals -> High-temperature or heat-resistant steel and alloy -> High alloy high-temperature steel Characteristics of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ).
Material : 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) Classification : High alloy high-temperature steel
Chemical composition in % of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) . C Si Mn Ni S P Cr Mo W V Ti Cu 0.12 - 0.18 max 0.4 0.5 - 0.9 0.4 - 0.8 max 0.025 max 0.03 11 - 13 0.5 - 0.7 0.7 - 1.1 0.15 - 0.3 max 0.2 max 0.3
Temperature of critical points of the grade 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ).
Ac1 = 800 - 810 , Ac3 (Acm ) = 860 - 880
Mechanical properties under Ò=20o Ñ of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Bar longitudinal 690 510 18 57 700 Guenching 1050o C, oil, Drawing 740o C,Cooling air, Bars 60 740 590 15 45 590 Annealing 900 - 950o C, oven, Guenching 1000 - 1020o C, oil, Drawing 600 - 700o C, air,
Brinell hardness of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) (annealing) , HB 10 -1 = 229 MPa
Physical properties of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) . 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 2.16 7850 100 10 24 477 200 10.5 25.5 498 300 2 10.7 25.9 545 400 1.94 11 26.3 625 500 1.84 11.2 26.8 741 600 1.66 11.6 27.2 896 700 27.2 800 27.6 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 15KH12VNMF ( 15H12VNMF, 15Õ12ÂÍÌÔ ) . Weldability: hard 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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