| Grade : | 10KH7MVFBR ( 10Х7МВФБР ) ( ЭП505 ) |
| Classification : | High alloy high-temperature steel |
| Equivalent grades: | Is absent |
Chemical composition in % for grade 10KH7MVFBR ( 10Х7МВФБР )
| C | Ni | S | P | Cr | Mo | V | Nb | B |
| 0.07 - 0.12 | 0.5 - 1 | max 0.025 | max 0.025 | 6 - 8 | 0.7 - 1 | 0.3 - 0.5 | 0.15 - 0.4 | max 0.005 |
Temperature of critical points for grade 10KH7MVFBR ( 10Х7МВФБР ).
| Ac1 = 860 , Ac3(Acm) = 905 , Ar3(Arcm) = 435 , Ar1 = 350 |
Mechanical properties under Т=20oС for grade 10KH7MVFBR ( 10Х7МВФБР )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Pipe | longitudinal | 690 | 580 | 20 | 65 | 1000 | Normalizing 980 - 100oC,Cooling air, Drawing 700 - 730oC, 3h,Cooling air, | |
| Blank for pipe | longitudinal | 690 | 610 | 18 | 59 | 530 | Annealing 800 - 830oC,Cooling oven, 30 oC/h, |
Physical properties for grade 10KH7MVFBR ( 10Х7МВФБР )
| 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 | 2.46 | 25.5 | 7850 | 510 | ||
| 100 | 2.396 | 10.25 | ||||
| 200 | 2.39 | 11.6 | ||||
| 300 | 2.195 | 12.4 | ||||
| 400 | 2.006 | 12.75 | ||||
| 500 | 1.92 | 13.25 | ||||
| 600 | 1.85 | 13.6 | ||||
| 700 | 1.685 | 13.4 | ||||
| 800 | 1.445 | |||||
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Specification :
| Mechanical properties : | |
| sв | - Tensile strength , [MPa] |
| sT | - Yield stress, [MPa] |
| d5 | - 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] |
10KH7MVFBR ( 10Х7МВФБР ) - High alloy high-temperature steel: chemical composition, mechanical and physical properties, hardness
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