Steel 22K
Designation
| Name |
The value |
| Designation GOST Cyrillic |
22К |
| Designation GOST Latin |
22K |
| Transliteration |
22K |
| The chemical elements |
22 |
Description
Steel 22K is used: for the manufacture of forgings of various parts of General machinery; type details of bottoms, shells, collar flanges, forged and welded drums of steam boilers, fittings, rings, tubes, tees and parts of rectangular shape for power equipment and pipelines with an absolute pressure of more than 3.9 MPa, thermal power plants and for operation at temperatures from -40 °C to +450 °C; vessels, working under pressure; equipment of nuclear power plants.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 5520-79, GOST 19903-74, GOST 19903-90 |
| Metal forming. Forgings |
В03 |
OST 108.030.113-87, OST 26-01-135-81, TU 108-11-910-87, TU 108.11.917-87, ST ЦКБА 010-2004 |
| Pipes steel and connecting parts to them |
В62 |
TU 0893-069-00212179-2011 |
| Sheets and stripes |
В33 |
TU 108-1025-81, TU 108-11-296-87, TU 108.11.906-87, TU 302.02.118-91, TU 05764417-041-95, TU 0900-005-05764417-99, TU 108.11.543-80 |
| Bulls. Blanks. Slabs |
В31 |
TU 108-665-77, TU 108-972-80, TU 302.02.092-90 |
| Sectional and shaped rolling |
В32 |
TU 14-2-553-83 |
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d |
y, % |
kJ/m2, кДж/м2 |
| Leaves categories: 2-4, 10, 16, 18-21 (KCU - as supplied / after mechanical aging) |
| 25-60 |
≥265 |
430-590 |
≥22 |
- |
- |
≥588/294 |
| 60-70 |
≥255 |
430-590 |
≥22 |
- |
- |
≥588/294 |
| Rolled sheet. Normalization at 940-960 °C + Vacation at 630-650 °C, air cooling at a speed of 65 °C/h |
| 30-70 |
≥250 |
≥510 |
≥22 |
- |
≥50 |
≥834 |
| 60-90 |
- |
≥440 |
- |
- |
- |
≥589 |
| Heated to 920-940 °C, cooling to 100 °C/h + Vacation at 600 °C cooling 50 °C/h (the duration and temperature of heat exposure) |
| - |
≥230 |
≥470 |
- |
≥29 |
≥59 |
≥804 |
| - |
≥230 |
≥440 |
- |
≥31 |
≥64 |
≥961 |
| - |
≥240 |
≥470 |
- |
≥25 |
≥59 |
- |
| - |
≥255 |
≥435 |
- |
≥34 |
≥64 |
≥765 |
| Leaves 30-70 mm, HR |
| - |
245-295 |
500-520 |
22-26 |
- |
50-61 |
- |
| - |
225-275 |
460-490 |
- |
- |
- |
- |
| - |
215-265 |
- |
- |
- |
- |
- |
| - |
215-235 |
- |
- |
- |
- |
- |
| - |
≥225 |
450-470 |
- |
- |
59-63 |
- |
| - |
≥195 |
280-310 |
19-29 |
- |
60-68 |
- |
| - |
110-130 |
135-165 |
20-34 |
- |
60-68 |
- |
| Leaves 30-70 mm. hot-rolled Heating to 930 °C (extract 2 h), cooling at a speed of 80-100 °C/h + Vacation at 600-650 °C, cooling at a rate of 50 °C/h |
| - |
225-245 |
460-470 |
31-36 |
- |
61-66 |
- |
| - |
185-215 |
390-430 |
26-27 |
- |
64-65 |
- |
| - |
165-185 |
390-430 |
25-27 |
- |
59-62 |
- |
| - |
155-165 |
≥390 |
27-29 |
- |
73-75 |
- |
| - |
135-145 |
255-265 |
28-31 |
- |
80-82 |
- |
| - |
≥110 |
≥160 |
33-41 |
- |
87-88 |
- |
| Sample prokatnyh 6 mm, length 30 mm. the Rate of deformation of 16 mm/min strain Rate 0,09 1/ |
| - |
≥81 |
≥120 |
≥57 |
- |
≥90 |
- |
| - |
≥56 |
≥72 |
≥49 |
- |
≥63 |
- |
| - |
≥49 |
≥84 |
≥60 |
- |
≥86 |
- |
| - |
≥45 |
≥59 |
≥59 |
- |
≥86 |
- |
| - |
≥26 |
≥42 |
≥75 |
- |
≥100 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 20 |
211 |
7859 |
517 |
173 |
- |
- |
| 200 |
205 |
7803 |
46 |
292 |
126 |
470 |
| 300 |
200 |
7770 |
44 |
381 |
128 |
483 |
| 400 |
191 |
7736 |
427 |
487 |
134 |
525 |
| 500 |
180 |
7699 |
393 |
601 |
135 |
525 |
| 600 |
165 |
7659 |
356 |
758 |
136 |
- |
| 700 |
- |
7617 |
319 |
925 |
146 |
571 |
| 800 |
- |
7624 |
259 |
1094 |
127 |
- |
| 900 |
- |
7600 |
264 |
1135 |
124 |
- |
| 1000 |
- |
7548 |
277 |
1167 |
134 |
- |
| 1100 |
- |
7496 |
285 |
1194 |
142 |
- |
| 1200 |
- |
- |
298 |
1219 |
148 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
| С |
Specific heat |
Technological properties
| Name |
The value |
| Weldability |
Limited weldability. Method of welding RDS, ADS under flux and gas protection. Recommended heating and subsequent heat treatment. ESW requires heat treatment. |
| Propensity to temper brittleness |
Tend not. |
| Forging temperature |
Start - 1280 °C, end - 700 °C. the cross Sections up to 400 mm are cooled in air. |
| Flock-sensitive sensitivity |
not sensitive. |
