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Grade : | 30KHN3А ( 30ХН3А ) |
Substitute: | 30Х2ГН2, 25Х2ГНТА, 34ХН2М |
Classification : | Alloy structurall steel |
Equivalent grades: | Go here |
C | Si | Mn | Ni | S | P | Cr | Cu |
0.27 - 0.33 | 0.17 - 0.37 | 0.3 - 0.6 | 2.75 - 3.15 | max 0.025 | max 0.025 | 0.6 - 0.9 | max 0.3 |
Ac1 = 700 , Ac3(Acm) = 800 , Ar3(Arcm) = 680 , Ar1 = 610 , Mn = 305 |
Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
- | mm | - | MPa | MPa | % | % | kJ / m2 | - |
Bar | Ø 5 | 1670 | 1420 | 13 | 50 | 660 | Guenching 850oC, oil, Drawing 200oC, air, | |
Bar | Ø 20 | 1670 | 1370 | 12 | 45 | 490 | Guenching 850oC, oil, Drawing 200oC, air, | |
Bar, GOST 4543-71 | Ø 25 | 980 | 785 | 10 | 50 | 780 | Guenching 820oC, oil, Drawing 530oC, water, |
Brinell hardness for 30KHN3А ( 30ХН3А ) (annealing) , GOST 4543-71 | HB 10 -1 = 241 MPa |
Weldability: | limited weldability. |
Flakes : | predisposed |
Temper brittleness: | predisposed |
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 | 2.15 | 34 | 7850 | 268 | ||
100 | 2.07 | 10.8 | 35 | 7830 | 494 | 317 |
200 | 1.95 | 11.5 | 36 | 7800 | 504 | 387 |
300 | 1.87 | 12.2 | 36 | 7770 | 518 | 469 |
400 | 1.75 | 12.8 | 36 | 7730 | 536 | 567 |
500 | 1.71 | 13.2 | 35 | 7700 | 558 | 681 |
600 | 13.5 | 31 | 7670 | 587 | 817 | |
700 | 28 | 7690 | 657 | 981 | ||
800 | 27 | 7650 | 703 | |||
900 | 7600 | 695 | ||||
1000 | 687 | |||||
T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Germany | Japan | France | Bulgaria | Poland | Czechia | |||||||||||
DIN,WNr | JIS | AFNOR | BDS | PN | CSN | |||||||||||
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В22 - Graded and shaped rolling |
B23 - Sheets and Strips |
В32 - Graded and shaped rolling |
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 |
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