07H21G7AN5 (EP222, 5H21G7AN5)
Parts of machines operating in corrosive environments from + 400 to-253 spindles, suspensions in oxygen installations, soldered structures, fasteners, flanges, threaded connections with increased screwing. Stand to the sea atmosphere.
welded products operating at temperatures up to -253 degrees C and in high corrosive environments; austenitic steel
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Cryogenic structural steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | P, % | C, % | S, % | N, % |
|---|---|---|---|---|---|---|---|---|---|
| GOST 5632-72 | 64.42–69.35 | < 0.7 | 6–7.5 | 19.5–21 | 5–6 | < 0.03 | < 0.07 | < 0.03 | 0.15–0.25 |
Information on suppliers
Physical characteristics
| Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ |
|---|---|
| 20 | 207 |
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| Round | GOST 5949-75 | Ø < 60 | 690 | 365 | 40 | 50 | 1270 | Hardening of 1000-1050 ° C, air |
Standards
| Standard | Description |
|---|---|
| GOST 5632-72 | |
| TU 14-1-1141-74 | |
| GOST 5949-75 | |
| TU 14-1-952-74 | |
| TU 14-1-2476-78 | |
| TU 14-1-2455-78 | |
| TU 14-1-3041-80 |
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 |
| N | % | Nitrogen |
Description of physical characteristics
| Parameter | Units of measurement | Description |
|---|---|---|
| $$E\cdot 10^{9}$$ | $$MPa$$ | Elastic modulus |
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) |
| $$\psi$$ | % | Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |