Steel 03Х20Н16АГ6
Steel 03Х13Н8Д2ТМ (EP699)
Steel 03Х19АГ3Н10 (DI105)
Steel 03Х19Г10Н7М2
Steel 03X20H16AG6
Steel 05X18N10AG10MB
Steel 10Х14Г14Н4Т (ЭИ711; Х14Г14Н4Т)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 03Х20Н16АГ6 |
| Designation GOST Latin | 03X20H16AG6 |
| Transliteration | 03H20N16AG6 |
| The chemical elements | 03Cr20Н16NMn6 |
Description
03Х20Н16АГ6 steel is used: for the manufacture of large welded tanks and vessels working under pressure at temperatures from -20 to +269 °C, of structures operating at cryogenic temperatures.
Note
Steel replacement Х18Н10 for equipment operating in 55% nitric acid, srednemolekulyarnyh environments and industrial atmosphere.
Standards
| Name | Code | Standards |
|---|---|---|
| Metal forming. Forgings | В03 | ST ЦКБА 010-2004 |
| Thermal and thermochemical treatment of metals | В04 | ST ЦКБА 016-2005 |
| Sectional and shaped rolling | В32 | TU 14-1-2922-80 |
| Sheets and stripes | В33 | TU 14-1-3291-81 |
| Bulls. Blanks. Slabs | В31 | TU 14-1-4653-89, TU 14-1-4655-89 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | N |
|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-2922-80 | ≤0.03 | ≤0.02 | ≤0.025 | 4-7 | 20-22 | ≤0.4 | 15-16 | The rest | 0.22-0.28 |
| TU 14-1-3291-81 | ≤0.03 | ≤0.02 | ≤0.025 | 5-7 | 20-22 | ≤0.4 | 15-16 | The rest | 0.22-0.3 |
Fe is the basis.
According to TU 14-1-3291-81, the chemical composition is given for steel grade 03Х20Н16АГ6.
According to TU 14-1-2922-80 the chemical composition is presented for steel grade 03Х20Н16АГ6-Ш. The residual content of aluminum in steel, determined by the ladle sample, is not more than 0.040%. The permissible deviations in nickel are -0.50%, for manganese + 0.50%, for silicon + 0.20%, for chromium -1.00%.
According to TU 14-1-3291-81, the chemical composition is given for steel grade 03Х20Н16АГ6.
According to TU 14-1-2922-80 the chemical composition is presented for steel grade 03Х20Н16АГ6-Ш. The residual content of aluminum in steel, determined by the ladle sample, is not more than 0.040%. The permissible deviations in nickel are -0.50%, for manganese + 0.50%, for silicon + 0.20%, for chromium -1.00%.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 |
|---|---|---|---|---|---|
| Procurement of parts of pipeline fittings from steel 03Х20Н16АГ6-W at ST CKBA 016-2005: Quenching in water from 1030-1070 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h), KCU-196 °C | |||||
| ≤60 | ≥343 | ≥637 | ≥30 | - | ≥1177 |
| Bars hot rolled and forged on the other 14-1-2922-80. Quenching in water or air with 1030-1070 °C | |||||
| 25 | ≥365 | ≥660 | ≥30 | - | ≥1177 |
| 25 | ≥345 | ≥640 | ≥30 | - | ≥1177 |
| Rolled steel in the delivery state. Quenching in water from 1000 °C | |||||
| ≥410 | ≥780 | ≥52 | ≥75 | ≥2200 | |
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 |
| y | The relative narrowing |
| kJ/m2 | Toughness |
Technological properties
| Name | The value |
|---|---|
| Weldability | Steel is welded without restrictions. To relieve residual stresses of welded assemblies operating at cryogenic temperatures used for tempering the air from 950-1050 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour). |
| Macrostructure and contamination | Macrostructure of steel 03Х20Н16АГ6-W on the other 14-1-2922-80 should not have traces of shrinkage, porosity, bubbles, delaminations, cracks, inclusions, visible without using the magnifying devices. Contamination of metal non-metallic inclusions is determined from each heat and shall not exceed (maximum score): - sulfides - 1 point; - stroke oxides, silicates plastic - 2 points; the point oxides, silicates fragile - 1.5 points; - nitrides and carbonitrides - 3 score. |
| Impact strength | Test on toughness of steel 03Х20Н16АГ6-W is performed at a temperature of -196°C according to GOST 22848 on samples of type 1. |
