08Cr17T steel
08Cr17T steel
Steel 08Cr17T: a classifier of steels and alloys. Below is systematized information about the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the brand — Steel 08Cr17T.
General information about 08Cr17T steel
| The substitute for the following steel grades |
| To substitute for steel grade: 12Х17, 08Х18Т1. |
| Type of delivery |
| Sheet 08X17T, section rolled, including shaped: GOST 5949−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silver GOST 14955−77. Sheet thin GOST 5582−75. Strip GOST 4405−75, GOST 103−76. Forgings and forged blanks GOST 1133−71. GOST 9941−81 pipes, GOST 9940−81. |
| Application |
| Products operating in oxidizing environments and also in atmospheric conditions, except marine atmosphere where pitting corrosion is possible. Heat exchangers, pipes. Welded structures that are not exposed to the action of shock loads and operating at temperatures not below -20 ° C. Steel is heat-resistant, corrosion-resistant ferritic class. |
Chemical composition of 08Cr17T steel
| Chemical element | % |
| Silicon (Si), not more | 0.8 |
| Manganese (Mn), not more | 0.8 |
| Copper (Cu), not more than | 0.30 |
| Nickel (Ni), not more than | 0.6 |
| Sulfur (S), not more than | 0.025 |
| Titanium (Ti), not more than | 0.8 |
| Carbon ©, not more than | 0.08 |
| Phosphorus (P), not more than | 0.035 |
| Chrome (Cr) | 16.0−18.0 |
Mechanical properties of 08Cr17T steel
Mechanical properties at elevated temperatures
| t test,°C | σB, MPa | δ5, % | KCU, J/m2 | |||||||||||
| 1100 | 59 | 110 | 147 | |||||||||||
| 1200 | 59 | 111 | 78 | |||||||||||
| Heating at 760 °C, cooling in air. | ||||||||||||||
| 20 | 460 | 30 | 20 | |||||||||||
| 200 | 390 | 31 | 98 | |||||||||||
| 300 | 330 | 32 | 127 | |||||||||||
| 400 | 280 | 33 | 137 | |||||||||||
| 500 | 245 | 35 | 118 | |||||||||||
| 600 | 195 | 36 | 167 | |||||||||||
| 700 | 155 | 37 | 196 | |||||||||||
| 800 | 78 | 54 | 176 | |||||||||||
| 900 | 59 | 90 | 167 | |||||||||||
Mechanical properties at 20 C
| Heat treatment, delivery condition | Section, mm | σB, MPa | δ5, % |
| Hot- or cold-rolled plates. Annealing or tempering 760−780°C, air (transverse samples) | >4 | 440 | 18 |
| Hot or cold rolled sheets. Annealed or tempered at 740−780°C (cross samples) | <3,9 | 460 | 20 |
| Seamless hot-deformed pipes without heat treatment | 3,5−32 | 372 | 17 |
| Seamless cold- and heat-treated seamless heat-treated pipes | 0,2−22 | 372 | 17 |
Technological properties of 08Cr17T steel
| Forging temperature |
| The beginning 1220, the end 900. Sections up to 350 mm are air cooled. |
| Weldability |
| limited. Satisfactory mechanical properties can be obtained when welding products with small thicknesses up to 2−3 mm. Sv-08Х20Н9Г7Т, Sv-05Х25Н12Тyu wires are used for automatic submerged-arc welding under flux AN-26 and ANF-14. |
| Tendency to tempering capacity |
| inclined at 475 C for long durations. |
Impact toughness of 08Cr17T steel
Impact toughness, KCU, J/cm2
| Delivery condition, heat treatment | +20 | -20 | -40 |
| Sheet thickness 8 mm. | 177 | 9 | 6 |
| 8 mm thick sheet. Cross-Section Samples | 156 | 7 | 6 |
Physical properties of 08Cr17T steel
| Temperature of test, °C | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
| Modulus of normal elasticity, E, GPa | 206 | |||||||||
| Steel density, pn, kg/m3 | 7700 | |||||||||
| Thermal conductivity coefficient W/(m — °C) | 25 | |||||||||
| Electrical resistivity (p, nominal value — m) | 600 | |||||||||
| Test temperature,°C | 20−100 | 20−200 | 20−300 | 20−400 | 20−500 | 20−600 | 20−700 | 20−800 | 20−900 | 20−1000 |
| Coefficient of linear expansion (a, 10−6 1/°C) | 10.0 | 10.0 | 10.5 | 10.5 | 11.0 | |||||
| Specific heat capacity (C, J/(kg -°C)) | 462 |
