03H21N21M4GB (ZI35, 00Х20Н20М4Б)
St. equipment of phosphoric phosphoric to-you, mineral fertilizers, cellulose acetate, vinyl acetate, and other aggressive media and with intensive wear — mixers, separators, extractors. 8000kg / m3. OZL-17U, OZL-26A, EA-395/9.
for welded structures and components operating in conditions of hot phosphoric acid doped with fluorine and sulfur compounds, as well as a low concentration of sulfuric acid at temperatures up to 80 degrees C, with nitric acid at temperatures up to 95 degrees C; austenitic steel
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Corrosion-resistant alloys and steels | Corrosion-resistant ordinary steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | P, % | C, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|
| GOST 5632-72 | 49.12–54.8 | < 0.6 | 1.8–2.5 | 20–22 | 20–22 | < 0.03 | < 0.03 | < 0.02 | 3.4–3.7 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Forgings | GOST 25054-81 | < 600 | Longitudinal | 490 | 215 | |||
| The plates | GOST 7350-77 | 590 | 295 | 30 | Hardening of 1060-1120 ° C, cooling water | |||
| Sheet | GOST 5582-75 | 540 | 245 | 25 | Hardening of 1080-1130 ° C, the water |
Technological Properties
| Weldability |
|---|
| no limits |
Standards
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Ni | % | Nickel |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
| Mo | % | Molybdenum |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
| $$\epsilon_L$$ | % | Elongation at break (longitudinal) |
Designation of types of weldability
| Parameter | Units of measurement | Description |
|---|---|---|
| no limits | Welding is performed without heating and without subsequent heat treatment | |
| Boundedly welded | Welding is possible with heating up to 100–120 °C and subsequent heat treatment | |
| Difficult to weld | For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing | |
| Not applicable for welded structures |