Steel 20X13 (02Х13)
Steel 16Х12В2ФТаР (EC181)
Steel 17Х18Н9 (2Х18Н9)
Steel 15Х16Н2АМ (EP479)
Steel 14Х20Н25В5МБ (LZhT)
Steel 14Х17Н2 (ЭИ268)
Steel 13Х16Н3М2АФ (VNS57)
Steel 12Х18Н9 (Х18Н9)
Steel 12Х12М1БФР (EP450)
Steel 11Х17Н
Steel 10Х25Н6АТМФ
Steel 10Х20Н33Б
10X18H9 steel
10X18N10T steel (EP502)
Steel 10Х12Н3М2БФ
Steel 10Х12Н20Т2 (EP452)
09Cr18Ni9 steel
Steel 09X17N (ChS130)
Steel 08Х20Н12АБФ
Steel 08X19H12TF
Steel 08Х16Н11М3
45X25H35BS steel
Steel CS 116-ID (EP753U-ID)
Steel 9Х13Н6ЛК4 (ЭИ928)
Steel 80X20NS (EP992)
Steel 50X25H35S2B
Steel 50Х25Н35В5К15С
Steel 50Х20Н35С2Б
Steel 50Kh15MFasch
Steel 4Х13Н6ЛВФ (EP354)
Steel 45Х28Н49В5С
Steel 08Cr13 (EI496)
Steel 45X25H20C2
Steel 45X25H20S
Steel 35Х24Н24Б
Steel 32Х13Н6К3М2БДЛТ (VNS-32; SES1)
Steel 30X23H7S
Steel 23Х15Н5АМ3 (18Х15Н6АМ3; VNS-9)
Steel 20Х13Н2ДМЮФ (DI96)
Steel 20X13 (02X13)
Steel 20Х12НМВБФАР (ЧС139)
Steel 02N15K10M5F5
Steel 03N18K8M3TU (ЗИ25)
Steel 03N18K1M3TU (ZI80)
Steel 03N17K10V10MT (EP836)
Steel 03N15K10M5F5 (EK169)
Steel 03N14Cr5M3Tu (OMC-2)
Steel 03N14H5M3T (EP777)
Steel 03N10Cr12D2T
Steel 02X8H22S6 (EP794)
Steel 02N18M3K3T (EK165; ČS101)
Steel 03N18K9M5TU (ChS4)
Steel 01N18K9M5T (EP637U)
Steel 015Cr18Nr15P30 (EP168B)
Steel 015Х18Н15Р26 (EP168А)
Steel 015Cr18Nr15P22 (EP167B)
Steel 015Cr18Nr15P17 (EP167A)
Steel 015Х18Н15Р13 (EP166Б)
Steel 015Cr18Nr15P09 (EP166A)
Steel 015N18M4TU (EP989; ČS5U)
Steel 015N18K13M5TU (EP948; ČS35)
Steel 05X12H2M
Steel 07Х25Н16АГ6Ф (EP750)
Steel 07Х15Н30В5М2 (ChS81)
Steel 07Х12НМФБ (ChS80)
Steel 07Х12НМБФ (EP609)
Steel 06Х16Н15М3БР (EP172)
Steel 06Х16Н15М2Г2ТФР (ЧС68)
Steel 06Х15Н6МВФБ (VNS16)
Steel 06X13H7D2 (EP898)
Steel 05Х12Н5К14М5ТВ (EP695)
Steel 08Х14Н2К3МФБ (EK93; VNS-51)
Steel 04Х16Н11М3Т (DI95)
Steel 03Х17Н14М3 (ЗИ66)
Steel 03Х13Н5М5К9 (VNL-6)
Steel 03Х12Н8МТю (ЗИ37)
Steel 03Х12Н8К5М2ТЮ (ЗИ90)
Steel 03Х11Н10М2Т1 (EP679)
Steel 03Х11Н10М2Т (EP678; VNS-17)
Steel 03N18M4TU (ChS25)
Steel 03N18M3TU (ChS5)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 20Х13 |
| Designation GOST Latin | 20X13 |
| Transliteration | 20H13 |
| The chemical elements | 20Cr13 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 02Х13 |
| Designation GOST Latin | 02X13 |
| Transliteration | 02H13 |
| The chemical elements | 02Cr13 |
Description
20X13 steel is used: for the manufacture of steam turbine blades operating at temperatures up to +580°C, valves, bolts and pipes; parts with high ductility, load and operating at temperatures up to 450−500 °C; products exposed to slightly aggressive media at room temperature; solid-rolled rings for different purposes; different parts of aviation (carburetor needles, bushings, gears, aircraft instruments, parts of instrument direct fuel injection and vane compressors, heat treated for hardness HRC<35. At higher hardness blades of the compressor are destroyed by stress corrosion) of electrodes type e-20X13 intended for manual arc surfacing of sealing surfaces of pipe fittings of carbon steel according to GOST 380 and GOST 1050 and casting of steels 20L, 25L, 20ГМЛ for OST 26-07-402.
Note
Chromium corrosion resistant steel, heat-resistant martensitic class.
The greatest corrosion resistance is achieved after heat treatment (quenching and tempering), and polishing. The recommended maximum operating temperature for a long time — up to 500 °C.
Temperature intense scaling in air +750 °C.
Standards
| Name | Code | Standards |
|---|---|---|
| Sheets and stripes | В23 | GOST 103-2006 |
| Sectional and shaped rolling | В22 | GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Steel alloy wire | В73 | GOST 18143-72 |
| Metal forming. Forgings | В03 | GOST 25054-81, OST 5Р.9125-84, OST 26-01-135-81, TU 0306.018-80, ST ЦКБА 010-2004 |
| Sheets and stripes | В33 | GOST 4405-75, GOST 5582-75, GOST 7350-77, TU 14-1-2186-77, TU 14-1-2476-78, TU 14-1-3620-83, TU 14-1-394-72 |
| Tapes | В34 | GOST 4986-79, OST 5.9093-72 |
| Classification, nomenclature and general norms | В30 | GOST 5632-72 |
| Sectional and shaped rolling | В32 | GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, GOST 18968-73, GOST 19442-74, OST 1 92049-76, TU 108.11-927-87, TU 14-1-1404-75, TU 14-1-2972-80, TU 14-131-804-90, TU 14-1-3564-83, TU 14-1-377-72, TU 14-1-3957-85, TU 14-1-5038-91, TU 14-1-655-73, TU 14-1-95-71, TU 14-11-245-88, TU 14-1-1271-75 |
| Classification, nomenclature and general norms | В20 | OST 1 90005-91 |
| Bulls. Blanks. Slabs | В21 | OST 1 90176-75 |
| Bulls. Blanks. Slabs | В31 | OST 108.020.03-82, OST 3-1686-90, OST 95-10-72, TU 14-1-565-84 |
| Welding and cutting of metals. Soldering, riveting | В05 | OST 26-07-2028-81 |
| Thermal and thermochemical treatment of metals | В04 | STP 26.260.484-2004, ST ЦКБА 016-2005 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-1404-75 | 0.16-0.25 | ≤0.025 | ≤0.03 | ≤0.5 | 12-14 | ≤0.6 | ≤0.6 | The rest | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 |
| TU 14-1-2476-78 | 0.16-0.25 | ≤0.025 | ≤0.03 | ≤0.8 | 12-14 | ≤0.8 | ≤0.6 | The rest | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 |
| TU 14-1-2186-77 | 0.16-0.24 | ≤0.025 | ≤0.03 | ≤0.6 | 12-14 | ≤0.6 | ≤0.5 | The rest | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 |
Fe is the basis.
According to TU 14-1-1404-75 the chemical composition is given for the brand 20Х13-Ш.
According to TU 14-1-2186-77 for steel smelted with electroslag remelting the content of S ≤ 0.015%.
According to TU 14-1-1404-75 the chemical composition is given for the brand 20Х13-Ш.
According to TU 14-1-2186-77 for steel smelted with electroslag remelting the content of S ≤ 0.015%.
Mechanical characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | d4 | d | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|---|---|---|---|
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 200 | ≥1300 | ≥1600 | ≥13 | - | - | ≥50 | ≥810 | - | ≥46 |
| A sample with a diameter of 6 mm and a length of 30 mm. Laminated. The rate of deformation of 16 mm/min, strain rate of 0.009 1/s | ||||||||||
| - | - | ≥59 | ≥70 | ≥51 | - | - | ≥98 | - | - | - |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥420 | ≥670 | ≥23 | - | - | ≥65 | - | - | - |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | ||||||||||
| - | - | - | 690-880 | - | - | - | - | - | 212-262 | 19-27 |
| Section of 14 mm. Hardening in air 1050 °C + Vacation at 600 °C | ||||||||||
| - | - | - | - | - | - | - | - | ≥710 | - | - |
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 300 | ≥1270 | ≥1460 | ≥14 | - | - | ≥57 | ≥980 | - | ≥42 |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥500 | ≥690 | ≥20 | - | - | ≥62 | - | - | - |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | ||||||||||
| - | - | - | 830-1030 | - | - | - | - | - | 248-302 | 21-33 |
| A sample with a diameter of 6 mm and a length of 30 mm. Laminated. The rate of deformation of 16 mm/min, strain rate of 0.009 1/s | ||||||||||
| - | - | - | - | ≥43 | - | - | - | - | - | - |
| Section of 14 mm. Hardening in air 1050 °C + Vacation at 600 °C | ||||||||||
| - | - | - | - | - | - | - | - | ≥810 | - | - |
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 450 | ≥1330 | ≥1510 | ≥15 | - | - | ≥57 | ≥710 | - | ≥45 |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥450 | ≥690 | ≥26 | - | - | ≥65 | - | - | - |
| A sample with a diameter of 6 mm and a length of 30 mm. Laminated. The rate of deformation of 16 mm/min, strain rate of 0.009 1/s | ||||||||||
| - | - | - | - | ≥56 | - | - | - | - | - | - |
| Section of 14 mm. Hardening in air 1050 °C + Vacation at 600 °C | ||||||||||
| - | - | - | - | - | - | - | - | ≥640 | - | - |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | ||||||||||
| - | - | - | - | - | - | - | - | - | - | 38-49 |
| Billet (forgings) OST 95-10-72. Quenching in oil or air from 1000-1050 °C + Vacation, cooling in oil or air (sample) | ||||||||||
| ≤200 | 230-370 | - | - | - | - | - | - | - | - | 40-48 |
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 500 | ≥1300 | ≥1510 | ≥19 | - | - | ≥54 | ≥750 | - | ≥46 |
| A sample with a diameter of 6 mm and a length of 30 mm. Laminated. The rate of deformation of 16 mm/min, strain rate of 0.009 1/s | ||||||||||
| - | - | ≥39 | ≥61 | ≥59 | - | - | - | - | - | - |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥440 | ≥660 | ≥24 | - | - | ≥63 | - | - | - |
| The cross section of 25 mm. Normalization at 1000 °C, cooling in air + Vacation at 680-750 °C | ||||||||||
| - | - | ≥540 | ≥700 | ≥21 | - | - | ≥62 | ≥760 | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil or air from 1000-1050 °C + Vacation, cooling in oil or air (sample) | ||||||||||
| ≤200 | 680-770 | ≥441 | ≥637 | ≥16 | - | - | ≥50 | ≥686 | 196-248 | - |
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 600 | ≥920 | ≥1020 | ≥14 | - | - | ≥60 | ≥710 | - | ≥29 |
| A sample with a diameter of 6 mm and a length of 30 mm. Laminated. The rate of deformation of 16 mm/min, strain rate of 0.009 1/s | ||||||||||
| - | - | ≥21 | ≥31 | ≥84 | - | - | ≥100 | - | - | - |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥380 | ≥630 | ≥23 | - | - | ≥63 | - | - | - |
| The cross section of 25 mm. Normalization at 1000 °C, cooling in air + Vacation at 680-750 °C | ||||||||||
| - | - | ≥560 | ≥730 | ≥22 | - | - | ≥59 | ≥540 | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil or air from 1000-1050 °C + Vacation, cooling in oil or air (sample) | ||||||||||
| ≤200 | 600-680 | ≥588 | ≥785 | ≥12 | - | - | ≥45 | ≥588 | 217-255 | 22-30 |
| Billets with a cross section of 14 mm. Hardening in air from 1050 °C + Vacation | ||||||||||
| - | 700 | ≥650 | ≥78 | ≥18 | - | - | ≥64 | ≥1020 | - | ≥20 |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥510 | ≥710 | ≥21 | - | - | ≥66 | 64-171 | - | - |
| Normalization at 1000-1020 °C, air cooling + Vacation at 730-750 °C, air cooling (indicated temperature and time of heat exposure) | ||||||||||
| - | - | ≥450 | ≥660 | ≥21 | - | - | ≥60 | - | - | - |
| The cross section of 25 mm. Normalization at 1000 °C, cooling in air + Vacation at 680-750 °C | ||||||||||
| - | - | ≥580 | ≥770 | ≥23 | - | - | ≥57 | ≥490 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| ≤60 | 280-370 | 1078-1274 | 1274-1470 | 3-8 | - | - | - | 98-392 | 350-400 | 39.6-44.5 |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥390 | ≥540 | ≥18 | - | - | ≥66 | ≥196 | - | - |
| The cross section of 25 mm. Normalization at 1000 °C, cooling in air + Vacation at 680-750 °C | ||||||||||
| - | - | ≥570 | ≥810 | ≥24 | - | - | ≥57 | ≥410 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| ≤60 | 600-670 | ≥686 | ≥882 | ≥10 | - | - | ≥40 | ≥392 | 269-310 | 29-36 |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥390 | ≥520 | ≥17 | - | - | ≥59 | ≥196 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| ≤60 | 650-700 | ≥539 | ≥784 | ≥12 | - | - | ≥45 | ≥588 | 235-269 | 23.5-29 |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥370 | ≥480 | ≥18 | - | - | ≥57 | ≥235 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| ≤60 | 700-770 | ≥441 | ≥647 | ≥16 | - | - | ≥55 | ≥784 | 197-248 | - |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥350 | ≥430 | ≥33 | - | - | ≥75 | ≥245 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| 100 | 700-770 | ≥441 | ≥647 | ≥15 | - | - | ≥50 | ≥735 | 197-248 | - |
| Rolled steel. Normalization of 1000-1020 °C + Vacation 730-750 °C. At 20 °C NV=187-217 | ||||||||||
| - | - | ≥275 | ≥340 | ≥37 | - | - | ≥83 | ≥216 | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| 300 | 700-770 | ≥441 | ≥647 | ≥13 | - | - | ≥45 | ≥490 | 197-248 | - |
| Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Annealing or vacation at 740-800 °C (samples) | ||||||||||
| 0.2-2 | - | - | ≥490 | - | ≥16 | - | - | - | - | - |
| 0.2 | - | - | ≥490 | - | ≥8 | - | - | - | - | - |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-800 °C | ||||||||||
| - | - | - | ≥490 | ≥20 | - | - | - | - | - | - |
| Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Annealing in air from 1000-1050 °C + Vacation 680-780 °C, air cooling or furnace | ||||||||||
| - | - | ≥375 | ≥510 | ≥20 | - | - | - | - | - | - |
| Forgings. Without heat treatment | ||||||||||
| 100-200 | - | ≥400 | ≥630 | ≥16 | - | - | ≥42 | - | - | - |
| 200-400 | - | ≥400 | ≥630 | ≥14 | - | - | ≥40 | - | - | - |
| 400-1000 | - | ≥400 | ≥630 | ≥14 | - | - | ≥40 | - | - | - |
| 100 | - | ≥400 | ≥630 | ≥17 | - | - | ≥45 | - | - | - |
| Forgings. Quenching in oil 1000-1050 °C + Vacation at 630-650 °C, air cooling | ||||||||||
| ≤60 | - | ≥540 | ≥687 | ≥15 | - | - | ≥50 | ≥589 | 217-269 | - |
| 60-100 | - | ≥540 | ≥687 | ≥14 | - | - | ≥45 | ≥540 | 217-269 | - |
| Forgings. Annealing in air or in oil with 1000-1050 °C to + Leave in 660-770 °C, cooling in air, water or oil | ||||||||||
| ≤60 | - | ≥441 | ≥647 | ≥16 | - | - | ≥55 | ≥785 | 197-229 | - |
| 100-300 | - | ≥441 | ≥647 | ≥13 | - | - | ≥45 | ≥490 | 197-229 | - |
| 1000 | - | ≥441 | ≥588 | ≥14 | - | - | ≥40 | ≥383 | - | - |
| 60-100 | - | ≥441 | ≥647 | ≥15 | - | - | ≥50 | ≥736 | 197-229 | - |
| Wire in the delivery state according to GOST 18143-72 (elongation, % at rated sample length of 100 mm is specified for the wire of the 1st class in brackets are for 2nd class) | ||||||||||
| 1-6 | - | - | 540-780 | - | - | ≥20 (≥14) | - | - | - | - |
| 1-6 | - | - | 980-1320 | - | - | - | - | - | - | - |
| Wire in the delivery state. Annealing or vacation at 740-800 °C | ||||||||||
| 1-6 | - | - | 490-780 | - | ≥14 | - | - | - | - | - |
| Bars and strip hot rolled and forged GOST 18968-73. Normalization or annealing at 1000-1050 °C, cooling in air or in oil + Leave in 660-770 °C, air cooling | ||||||||||
| - | 490-655 | ≥670 | ≥18 | - | - | ≥50 | ≥686 | 207-241 | - | |
| Bars processed on a given strength (TS) according to GOST 18907-73 | ||||||||||
| ≥5 | - | - | 510-780 | - | - | ≥14 | - | - | - | - |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in oil or air from 1000-1050 °C + Vacation, air cooling or oil | ||||||||||
| 600-700 | ≥635 | ≥830 | ≥10 | - | - | ≥50 | ≥588 | - | - | |
| 660-770 | ≥440 | ≥650 | ≥16 | - | - | ≥55 | ≥784 | - | - | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil 1000-1050 °C + Vacation, air cooling | ||||||||||
| 660-770 | ≥450 | ≥660 | ≥16 | - | - | ≥55 | ≥784 | - | - | |
| 250-300 | ≥1200 | ≥1400 | ≥15 | - | - | ≥40 | ≥490 | - | - | |
| Contoured rods (g/K, x/K and x/t for steam turbine blades; x/a and x/t for coupling blades of steam turbines) according to GOST 19442-74. Annealing in air or in oil with 1000-1050 °C to + Leave in 660-770 °C, air cooling (specified strength) | ||||||||||
| - | 490-656 | 617-784 | ≥18 | - | - | ≥50 | ≥686 | 207-241 | - | |
| - | 686-882 | 833-980 | ≥15 | - | - | ≥50 | - | 255-302 | - | |
| Forming at OST 1 90176-75. Quenching in oil or in air from 1050 °C + Vacation at 600-700 °C, cooling in air or in oil | ||||||||||
| - | ≥638 | ≥834 | ≥10 | - | - | ≥50 | ≥588 | 241-341 | - | |
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 |
| d4 | Elongation after rupture |
| d | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Physical characteristics
| Temperature | Е, ГПа | G, ГПа | r, кг/м3 | l, Вт/(м · °С) | R, НОм · м | a, 10-6 1/°С | С, Дж/(кг · °С) |
|---|---|---|---|---|---|---|---|
| 0 | 218 | 86 | 7670 | - | 588 | - | - |
| 20 | 218 | - | 7670 | 23 | 588 | - | - |
| 100 | 214 | 84 | 7660 | 26 | 653 | 102 | 112 |
| 200 | 208 | 80 | 7630 | 26 | 730 | 112 | 117 |
| 300 | 200 | 78 | 7600 | 26 | 800 | 115 | 123 |
| 400 | 189 | 73 | 7570 | 26 | 884 | 119 | 127 |
| 500 | 181 | 69 | 7540 | 27 | 952 | 122 | 132 |
| 600 | 169 | 63 | 7510 | 26 | 1022 | 128 | 137 |
| 700 | - | - | 7480 | 26 | 1102 | 128 | 147 |
| 800 | - | - | 7450 | 27 | - | 128 | - |
| 900 | - | - | - | 28 | - | - | 155 |
| 1000 | - | - | - | - | - | 13 | - |
| 1100 | - | - | - | - | - | - | 159 |
A description of the physical symbols
| Name | Description |
|---|---|
| Е | The normal elasticity modulus |
| G | Modulus of elasticity shear torsion |
| r | Density |
| l | Coefficient of thermal conductivity |
| R | UD. the resistivity |
| a | The coefficient of linear expansion |
| С | Specific heat |
Technological properties
| Name | The value |
|---|---|
| Weldability | Limited weldability. Welding methods: SMAW, submerged arc ADS, ARDS and CCC. Preheating and heat treatment are applied depending on the method of welding, type and purpose of the design. |
| Propensity to temper brittleness | Inclined. |
| Forging temperature | Start - 1250 °C, the end - 850 °C. the cross Sections up to 150 mm are cooled in air, 150-400 mm are necessary low-temperature annealing, one hypothermia. |
| Flock-sensitive sensitivity | not sensitive. |
| Workability by cutting | In the hardened and tempered condition with a NV 241 and blower SB=730 MPa Kn TV.SPL.=0,7 Kn b.St.=0,45. To improve the machinability and the hardness HB ≤ 240 of the workpiece is subjected to annealing at 740-780 °C for 1-3 h with air cooling. |
| Macrostructure and contamination | Macrostructure of steel shall be no traces of shrinkage, delamination, foreign inclusions. |
| Features of heat treatment | Steel products can be subjected to hardening, leave, annealing. The quenching and tempering of the products is done to achieve: a) maximum corrosion resistance; b) the specified level of mechanical properties. Hardening of steel products is carried out in oil with 1000-1050 °C. the holding Time at the heating for hardening to products with a wall thickness or diameter up to 10 mm - 20 min., above 10mm-20 min + 1 min per 1 mm maximum thickness. Weldment of steel 20X13 before heating for hardening is subjected to annealing at 700 °C, exposure for 1-2 h. Immediately after quenching (in order to avoid spontaneous cracking) products of martensitic steels must be subjected to the release. The maximum strength properties of the products acquired after the holidays according to the mode: heating up to 250-300 °C, exposure 1-3 h, air cooling. Maximum corrosion resistance and formability products acquired after the holidays according to the mode: heating up to 700-750 °With, exposure time - 20 min + 1 min per 1 mm maximum metal thickness, but not less than 40 min, cooling in oil. Softening heat treatment is annealing at 750-850 °C with cooling with the furnace to 500 °C. is Not allowed to make a vacation at 450-550 °C, Since this leads to a decrease in toughness. Workpiece to improve the mechanical workability is subjected to intermediate annealing at 600-760 °C for 2-4 h. Welded components and products of steel 20X13 for improving the corrosion resistance is subjected to annealing regime: heating to 700-750 °C, exposure - 1 h, air cooling. To obtain characteristic values of mechanical properties and hardness set ST CKBA 010 and to achieve maximum corrosion resistance, parts (workpiece) valves shall be subjected to hardening and tempering. The heating of the parts (workpieces) in the temperature range from 500 °C to 800 °C must be carried out at a speed of not more than 200 °C per hour. In the temperature range 750 - 800 °C it is necessary to give exposure to the full heating of the charge. Further heating to the quenching temperature produced by the furnace. For parts with thickness (diameter) up to 120 mm the rate of heating is not limited and aging at a temperature of from 750 °C to 800 °C is not possible. Parts included in friction and sealing shutter valves, can be subjected to surface hardening with heating by high frequency currents (HFC) with the aim of improving hardness while maintaining high mechanical properties in the core part. Surface hardening with heating HDTV applies to parts of thickness (diameter) of not less than 15 mm and is made only after a preliminary heat treatment improves the hardness to 36.5 HRC. |
