| Grade : | 34KHN3M ( 34ХН3М ) |
| Substitute: | 35ХНВ, 35ХГНМ, 38Х2НМ, 34ХН1М, 34ХН3МА, 34ХН3МФА |
| Classification : | Alloy structurall steel |
| Equivalent grades: | Is absent |
Chemical composition in % for grade 34KHN3M ( 34ХН3М )
| C | Si | Mn | Ni | S | P | Cr | Mo |
| 0.3 - 0.4 | 0.17 - 0.37 | 0.5 - 0.8 | 2.75 - 3.25 | max 0.035 | max 0.03 | 0.7 - 1.1 | 0.25 - 0.4 |
Temperature of critical points for grade 34KHN3M ( 34ХН3М ).
| Ac1 = 720 , Ac3(Acm) = 790 , Ar3(Arcm) = 490 |
Mechanical properties under Т=20oС for grade 34KHN3M ( 34ХН3М )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Forging | 100 - 300 | 785 | 640 | 12 | 38 | 490 | Normalizing |
| Brinell hardness for 34KHN3M ( 34ХН3М ) , | HB 10 -1 = 277 - 321 MPa |
Technological properties for grade 34KHN3M ( 34ХН3М )
| Weldability: | limited weldability. |
| Flakes : | predisposed |
| Temper brittleness: | weakly predisposed |
Physical properties for grade 34KHN3M ( 34ХН3М )
| 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 | 2.07 | 7830 | ||||
| 100 | 2.03 | 10.8 | 36 | 7810 | ||
| 200 | 1.98 | 11.6 | 37 | 7780 | ||
| 300 | 1.92 | 12.5 | 37 | |||
| 400 | 1.82 | 13.3 | 37 | 7710 | ||
| 500 | 1.73 | 13.5 | 35 | |||
| 600 | 13.7 | 31 | 7650 | |||
| 700 | 28 | |||||
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Types of delivery of grade 34KHN3M ( 34ХН3М )
| B03 - Metal forming treatment. Forgings |
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] |
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 |
34KHN3M ( 34ХН3М ) - Alloy structurall steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys
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