Metals -> High-temperature or heat-resistant steel and alloy -> High alloy high-temperature steel Characteristics of the material 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ).
Material : 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ) Classification : High alloy high-temperature steel
Chemical composition in % of the material 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ) . C Si Mn Ni S P Cr Mo W Nb Ti 0.28 - 0.35 max 0.8 0.8 - 1.5 8 - 10 max 0.02 max 0.035 18 - 20 1 - 1.5 1 - 1.5 0.2 - 0.5 0.2 - 0.5
Mechanical properties under Ò=20o Ñ of the material 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ) .
Assortment
Dimension
Direct.
s â
s T
d 5
y
KCU
Heat treatment - mm - MPa MPa % % kJ / m2 - Bars longitudinal 600 300 30 40 Heating 1140 - 1180o C, water, Ageing 750 - 800o C, 15h, air, Forging longitudinal 700 300 35 40 600 Heating 1180o C, water, Ageing 800o C, 15h, air, Forging tangent 700 300 27 30 400 Heating 1180o C, water, Ageing 800o C, 15h, air,
Physical properties of the material 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ) . 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 2.05 7960 100 15.1 850 200 16.3 900 300 1.9 18.4 980 400 1.85 16.02 20.05 1020 500 1.79 16.37 21.7 1080 550 1.75 600 1.7 16.75 23.4 1100 650 1.65 700 1.6 16.97 25.1 1150 800 17.94 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 31KH19N9MVBT ( 31H19N9MVBT, 31Õ19Í9ÌÂÁÒ ) . 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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