| Grade : | 38KHMА ( 38ХМА ) |
| Classification : | Alloy structurall steel |
| Equivalent grades: | Go here |
Chemical composition in % for grade 38KHMА ( 38ХМА )
| C | Si | Mn | Ni | S | P | Cr | Mo | Cu |
| 0.35 - 0.42 | 0.17 - 0.37 | 0.35 - 0.65 | max 0.3 | max 0.025 | max 0.025 | 0.9 - 1.3 | 0.2 - 0.3 | max 0.3 |
Temperature of critical points for grade 38KHMА ( 38ХМА ).
| Ac1 = 758 , Ac3(Acm) = 805 , Ar3(Arcm) = 725 , Ar1 = 650 |
Mechanical properties under Т=20oС for grade 38KHMА ( 38ХМА )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Bar | Ø 25 | 980 | 885 | 11 | 45 | 690 | Guenching 850oC, oil, Drawing 600oC, air, |
Physical properties for grade 38KHMА ( 38ХМА )
| 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 | 2.11 | 33 | 257 | |||
| 100 | 2.01 | 12.4 | 35 | 496 | 280 | |
| 200 | 1.94 | 13.1 | 38 | 508 | 310 | |
| 300 | 1.84 | 13.7 | 39 | 525 | 380 | |
| 400 | 1.74 | 14.2 | 36 | 538 | 470 | |
| 500 | 1.69 | 14.5 | 34 | 567 | 580 | |
| 600 | 1.66 | 14.6 | 33 | 600 | 720 | |
| 700 | 1.41 | 14.7 | 31 | 672 | 870 | |
| 800 | 1.29 | 11.2 | 27 | 697 | 1060 | |
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Equivalent steels for grade 38KHMА ( 38ХМА )
| USA | Germany | France | England | Spain | |||||||
| - | DIN,WNr | AFNOR | BS | UNE | |||||||
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Types of delivery of grade 38KHMА ( 38ХМА )
| В22 - Graded and shaped rolling |
| B23 - Sheets and Strips |
| В32 - Graded and shaped rolling |
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] |
38KHMА ( 38ХМА ) - 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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