Steel 38KH2N3M
Description
Steel 38KH2N3M
Steel 38Х2Н3М: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the brand — Steel 38X2H3M.
General information about steel 38Х2Н3М
| Application |
| Responsible container parts with high mechanical requirements properties at elevated temperatures. |
Chemical composition of steel 38Х2Н3М
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.50−0.80 |
| Molybdenum (Mo) |
0.30−0.40 |
| Nickel (Ni) |
2.75−3.25 |
| Sulfur (S), no more |
0.035 |
| Carbon (C) |
0.35−0.42 |
| Phosphorus (P), no more |
0.030 |
| Chromium (Cr) |
1.00−1.50 |
Mechanical properties of steel 38Х2Н3М
Mechanical properties of forgings
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Hardening 850−870 ° С, oil. Vacation 560−620 ° С, cooling with oven |
| KP 900 |
101−300 |
900 |
1000 |
12 |
35 |
60 |
302−340 |
| KP 800 |
301−500 |
800 |
950 |
eleven |
thirty |
50 |
263−331 |
| KP 750 |
501−800 |
750 |
900 |
eleven |
thirty |
40 |
277−321 |
| |
801−1300 |
|
|
|
|
|
241−321 |
| Normalization 850−870 ° С, air. Vacation 560−620 ° С, cooling with oven |
| KP 750 |
301−500 |
750 |
900 |
eleven |
thirty |
40 |
277−321 |
| KP 700 |
501−800 |
700 |
850 |
ten |
thirty |
40 |
262−311 |
| |
801−1300 |
|
|
|
|
|
229−302 |
Mechanical properties versus test temperature
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
HB |
| Forgings up to 600 mm. Normalization 850−870 ° С, air. Vacation 500−550 ° С, cooling with oven |
| 20 |
800 |
900 |
eleven |
269−321 |
| 450 |
650 |
800 |
eleven |
|
| Forgings up to 600 mm. Hardening 850−870 ° С, oil. Vacation 510−540 ° С, oven cooling. |
| 20 |
1000 |
1100 |
eleven |
321−388 |
| 450 |
750 |
850 |
12 |
|
| 500 |
700 |
800 |
12 |
|
| Forgings up to 600 mm. Hardening 850−870 ° С, oil. Vacation 550−580 ° C, oven cooling. |
| 20 |
800 |
900 |
12 |
269−321 |
| 450 |
700 |
800 |
12 |
|
| 500 |
650 |
750 |
12 |
|
Technological properties of steel 38Х2Н3М
| Forging temperature |
| The beginning is 1200, the end is 850. |
| Weldability |
| difficult to weld |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| very sensitive |
Hardenability of steel 38Х2Н3М
| Distance from the end, mm / HRC e |
| |
| |
| Amount of martensite,% |
Crit. Diam. in water, mm |
Crit. Diam. in oil, mm |
Crete. hardness, HRCэ |
Dist. from the cooled end |
| 100 |
230 |
|
51.5 |
80 |
| 100% bainite |
|
1000 |
48.5 |
200 |
