Steel 14Х2ГМР
Description
Steel 14Х2ГМР
Steel 14Х2ГМР: a brand of steels and alloys. Below is a systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 14H2GMR.
General information about steel 14Х2ГМР
| Substitute brand |
| Steel 14ХНМДФР. |
| Delivery type |
| Thick sheet ChMTU 1−645−69. Forgings and forged billets GOST 8479−70. |
| Application |
| Heavily loaded welded parts and assemblies. |
Chemical composition of steel 14H2GMR
| Chemical element |
% |
| Boron (B), no more |
0.006 |
| Silicon (Si) |
0.90−1.20 |
| Manganese (Mn) |
0.17−0.37 |
| Copper (Cu), no more |
0.30 |
| Molybdenum (Mo) |
0.40−0.50 |
| Arsenic (As), no more |
0.08 |
| Nickel (Ni), no more |
0.30 |
| Sulfur (S), no more |
0.035 |
| Carbon (C) |
0.10−0.16 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr) |
1.30−1.70 |
Mechanical properties of steel 14Х2ГМР
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Hardening 920−940 ° C. Vacation 620−650 ° C. |
101−300 |
490 |
590 |
fourteen |
35 |
49 |
187−229 |
Mechanical properties at elevated temperatures
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
| Workpiece with a section of 20 mm. Hardening. Vacation 680 ° С |
| 20 |
700 |
760 |
25 |
70 |
| 300 |
630 |
700 |
20 |
68 |
| 400 |
530 |
690 |
21 |
66 |
| 500 |
530 |
590 |
20 |
73 |
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
| Sheet with a thickness of 16 mm. Hardening 950 ° С, water (transverse samples) |
| 200 |
1100 |
1350 |
eleven |
41 |
40 |
| 300 |
1100 |
1300 |
ten |
40 |
nine |
| 400 |
1000 |
1200 |
ten |
43 |
fifteen |
| 500 |
1000 |
1100 |
12 |
46 |
40 |
| 600 |
780 |
870 |
17 |
54 |
65 |
| 700 |
630 |
700 |
25 |
59 |
78 |
Mechanical properties after HTMT
| Heat treatment, delivery condition |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
| Blank 360Х240 Х 18 mm. HTMO: austenitizing at 950 ° C, holding for 1 h, deformation 35% in 1 pass. KCU — (+ 20 / -40) |
| Hardening 900 ° C, water. |
1150 |
1300 |
nine |
38 |
79/44 |
| Hardening 900 ° С, water, tempering 650 ° С, holding for 1 h. |
900 |
930 |
fourteen |
49 |
145/118 |
Technological properties of steel 14Х2ГМР
| Forging temperature |
| Beginning 1220, end 750. |
| Weldability |
| satisfactory. Welding methods: RDS, ArDS submerged arc and gas shielded. Heating is recommended when welding rigid structures. |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| sensitive |
Temperature of critical points of steel 14Х2ГМР
| Critical point |
° C |
| Ac1 |
750 |
| Ac3 |
875 |
| Mn |
365 |
Impact strength of steel 14H2GMR
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+20 |
-40 |
| Forging with a section of 101−300 mm. Quenching 920−940 С, water. Vacation 620−650 С, air (sample cutting place — 1 / 3R). |
49 |
40 |
| Sheet 10 mm thick. Quenching 950 C, water. Vacation 650 С, exposure 1 h (transverse samples) |
150 |
120 |
| Sheet 10 mm thick, HTMO: rolling in 1 pass at a speed of 1 m / s, deformation 20%. Quenching 950 C, water. Vacation 650 С, exposure 1 h (transverse samples) |
170 |
165 |
Hardenability of steel 14Х2ГМР
Hardness HRCэ.
| Distance from the end, mm / HRC e |
| thirty |
100 |
| 31 |
27 |
| Crete. hardness, HRCэ |
Dist. from the cooled end |
| 31 |
thirty |
| 27 |
100 |
