RU96121789A - HIGH-STRENGTH STEEL OF THE MAIN PIPELINES, HAVING A LOW COEFFICIENT COEFFICIENT AND EXCELLENT LOW-TEMPERATURE VISCOSITY - Google Patents
HIGH-STRENGTH STEEL OF THE MAIN PIPELINES, HAVING A LOW COEFFICIENT COEFFICIENT AND EXCELLENT LOW-TEMPERATURE VISCOSITYInfo
- Publication number
- RU96121789A RU96121789A RU96121789/02A RU96121789A RU96121789A RU 96121789 A RU96121789 A RU 96121789A RU 96121789/02 A RU96121789/02 A RU 96121789/02A RU 96121789 A RU96121789 A RU 96121789A RU 96121789 A RU96121789 A RU 96121789A
- Authority
- RU
- Russia
- Prior art keywords
- ferrite
- coefficient
- low
- temperature viscosity
- strength steel
- Prior art date
Links
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims 12
- 229910000859 α-Fe Inorganic materials 0.000 claims 12
- 229910000831 Steel Inorganic materials 0.000 claims 8
- 239000010959 steel Substances 0.000 claims 8
- 239000012535 impurity Substances 0.000 claims 3
- 229910000734 martensite Inorganic materials 0.000 claims 3
- 229910001047 Hard ferrite Inorganic materials 0.000 claims 1
Claims (1)
C - 0,05 - 0,10
Si - Не более 0,6
Mn - 1,7 - 2,5
P - Не более 0,015
S - Не более 0,003
Ni - 0,1 - 1,0
Mo - 0,15 - 0,60
Nb - 0,01 - 0,10
Ti - 0,005 - 0,030
Al - Не более 0,06
N - 0,001 - 0,006
Fe - Остальное
и неизбежные примеси, имеющая значение Р, определяемое следующей основной формулой, в диапазоне 1,9 - 4,0, и микроструктуру, содержащую мартенсит, байнит и феррит, в которой ферритная фракция составляет 20 - 90%, при этом феррит включает 50 - 100% нагартованного феррита и среднее значение размера зерна феррита составляет не более 5 мкм:
при условии, что В принимает значение _→ 0, когда β _→ B <3 ppm, и значение _→ 1, когда β _→ B ≥ 3 ppm.1. High-strength steel for main pipes, having a low coefficient of flow and excellent low-temperature viscosity, containing,% by weight:
C - 0.05 - 0.10
Si - Not more than 0.6
Mn - 1.7 - 2.5
P - Not more than 0.015
S - Not more than 0,003
Ni - 0.1 - 1.0
Mo - 0.15 - 0.60
Nb - 0.01 - 0.10
Ti - 0.005 - 0.030
Al - Not more than 0.06
N - 0.001 - 0.006
Fe - Rest
and inevitable impurities, having a value of P, defined by the following basic formula, in the range of 1.9 - 4.0, and a microstructure containing martensite, baynite and ferrite, in which the ferrite fraction is 20 - 90%, while the ferrite includes 50 - 100 % hard ferrite and the average grain size of ferrite is not more than 5 microns:
provided that B takes the value _ → 0 when β _ → B <3 ppm, and the value _ → 1 when β _ → B ≥ 3 ppm.
B - 0,0003 - 0,0020
Cu - 0,1 - 1,2
Cr - 0,1 - 0,8
V - 0,01 - 0,10
3. Сталь по пп.1 и 2, которая дополнительно содержит, %:
Ca - 0,001 - 0,006
РЗМ - 0,001 - 0,02
Mg - 0,001 - 0,006
4. Высокопрочная сталь для магистральных труб, имеющая низкий коэффициент текучести и прекрасную низкотемпературную вязкость, содержащая, % по весу:
C - 0,05 - 0,10
Si - Не более 0,6
Mn - 1,7 - 2,2
P - Не более 0,015
S - Не более 0,003
Ni - 0,1 - 1,0
Mo - 0,15 - 0,50
Nb - 0,01 - 0,10
Ti - 0,005 - 0,030
Al - Не более 0,06
B - 0,0003 - 0,0020
N - 0,001 - 0,006
Fe - Остальное
и неизбежные примеси, имеющая значение Р, определяемое последующей основной формулой, в диапазоне 2,5 - 4,0 и микроструктуру, содержащую мартенсит, байнит и феррит, в которой ферритная фракция составляет 20 - 90%, феррит включает 50 - 100% нагартованного феррита и средний размер зерна феррита составляет не более 5 мкм; P = 2,7C + 0,4Si + Mn + 0,45Ni + 2Mo.2. The steel according to claim 1, which additionally contains,%:
B - 0.0003 - 0.0020
Cu - 0.1 - 1.2
Cr - 0.1 - 0.8
V - 0.01 - 0.10
3. Steel on PP.1 and 2, which additionally contains,%:
Ca - 0.001 - 0.006
REM - 0.001 - 0.02
Mg - 0.001 - 0.006
4. High-strength steel for trunk pipes, having a low turnover coefficient and excellent low-temperature viscosity, containing,% by weight:
C - 0.05 - 0.10
Si - Not more than 0.6
Mn - 1.7 - 2.2
P - Not more than 0.015
S - Not more than 0,003
Ni - 0.1 - 1.0
Mo - 0.15 - 0.50
Nb - 0.01 - 0.10
Ti - 0.005 - 0.030
Al - Not more than 0.06
B - 0.0003 - 0.0020
N - 0.001 - 0.006
Fe - Rest
and inevitable impurities, having a value of P, determined by the following basic formula, in the range of 2.5–4.0 and a microstructure containing martensite, baynite and ferrite, in which the ferrite fraction is 20–90%; and the average grain size of ferrite is no more than 5 microns; P = 2.7C + 0.4Si + Mn + 0.45Ni + 2Mo.
V - 0,01 - 0,10
Cr - 0,1 - 0,6
Cu - 0,1 - 1,0
6. Высокопрочная сталь для магистральных труб, имеющая низкий коэффициент текучести и прекрасную низкотемпературную вязкость, содержащая, % по весу:
C - 0,05 - 0,10
Si - Не более 0,6
Mn - 1,7 - 2,5
P - Не более 0,015
S - Не более 0,003
Ni - 0,1 - 1,0
Mo - 0,35 - 0,50
Nb - 0,01 - 0,10
Ti - 0,005 - 0,030
Al - Не более 0,06
Cu - 0,8 - 1,2
N - 0,001 - 0,006
Fe - Остальное
и неизбежные примеси, имеющая значение Р, определяемое последующей основной формулой, в диапазоне 2,5 - 3,5, и микроструктуру, содержащую мартенсит, байнит и феррит, в которой ферритная фракция составляет 20 - 90%, при этом феррит включает 50 - 100% нагартованного феррита и средний размер зерна феррита составляет не более 5 мкм: P = 2,7C + 0,4Si + Mn + 0,8Cr + 0,45(Ni + Cu) + Mo + V - 1.5. The steel according to claim 4, which additionally contains,%:
V - 0.01 - 0.10
Cr - 0.1 - 0.6
Cu - 0.1 - 1.0
6. High-strength steel for trunk pipes, having a low flow coefficient and excellent low-temperature viscosity, containing,% by weight:
C - 0.05 - 0.10
Si - Not more than 0.6
Mn - 1.7 - 2.5
P - Not more than 0.015
S - Not more than 0,003
Ni - 0.1 - 1.0
Mo - 0.35 - 0.50
Nb - 0.01 - 0.10
Ti - 0.005 - 0.030
Al - Not more than 0.06
Cu - 0.8 - 1.2
N - 0.001 - 0.006
Fe - Rest
and inevitable impurities, having a P value, determined by the following basic formula, in the range of 2.5 - 3.5, and a microstructure containing martensite, baynite and ferrite, in which the ferrite fraction is 20 - 90%, while the ferrite includes 50 - 100 % of hardened ferrite and the average grain size of the ferrite is no more than 5 microns: P = 2.7C + 0.4Si + Mn + 0.8Cr + 0.45 (Ni + Cu) + Mo + V - 1.
Cr - 0,1 - 0,6
V - 0,01 - 0,10
8. Сталь по пп.4 - 7, которая дополнительно содержит, %:
Ca - 0,001 - 0,006
РЗМ - 0,001 - 0,02
Mg - 0,001 - 0,0067. The steel according to claim 6, which additionally contains,%:
Cr - 0.1 - 0.6
V - 0.01 - 0.10
8. Steel on PP.4 - 7, which additionally contains,%:
Ca - 0.001 - 0.006
REM - 0.001 - 0.02
Mg - 0.001 - 0.006
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/17302 | 1995-02-03 | ||
JP01730295A JP3244984B2 (en) | 1995-02-03 | 1995-02-03 | High strength linepipe steel with low yield ratio and excellent low temperature toughness |
JP01830895A JP3244987B2 (en) | 1995-02-06 | 1995-02-06 | High strength linepipe steel with low yield ratio |
JP7/18308 | 1995-02-06 | ||
JP7/72725 | 1995-03-30 | ||
JP7/72726 | 1995-03-30 | ||
JP7/72724 | 1995-03-30 | ||
JP19535895A JP3262972B2 (en) | 1995-07-31 | 1995-07-31 | Weldable high strength steel with low yield ratio and excellent low temperature toughness |
JP7/195358 | 1995-07-31 | ||
PCT/JP1996/000157 WO1996023909A1 (en) | 1995-02-03 | 1996-01-26 | High-strength line-pipe steel having low yield ratio and excellent low-temperature toughness |
Publications (2)
Publication Number | Publication Date |
---|---|
RU96121789A true RU96121789A (en) | 1999-01-20 |
RU2136776C1 RU2136776C1 (en) | 1999-09-10 |
Family
ID=27281763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU96121789A RU2136776C1 (en) | 1995-02-03 | 1996-01-26 | High-strength steel for main pipelines with low yield factor and high low-temperature ductility |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU2136776C1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2241780C1 (en) * | 2003-12-30 | 2004-12-10 | Закрытое акционерное общество Научно-производственное объединение "ПОЛИМЕТАЛЛ" | Steel |
WO2012036148A1 (en) * | 2010-09-14 | 2012-03-22 | 新日本製鐵株式会社 | Thick welded steel pipe having excellent low-temperature toughness, method for producing thick welded steel pipe having excellent low-temperature toughness, and steel sheet for producing thick welded steel pipe |
RU2465346C1 (en) * | 2011-08-25 | 2012-10-27 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Manufacturing method of high-strength strip for pipes of main pipelines |
RU2500820C1 (en) * | 2012-08-29 | 2013-12-10 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Production method of rolled metal from low-alloy steel for manufacture of structural members of oil and gas lines |
EP3042976B1 (en) * | 2013-08-30 | 2020-05-13 | Nippon Steel Corporation | Steel sheet for thick-walled high-strength line pipe having exceptional corrosion resistance, crush resistance properties, and low-temperature ductility, and line pipe |
KR20200051745A (en) * | 2017-09-28 | 2020-05-13 | 제이에프이 스틸 가부시키가이샤 | High strength steel pipe for internal sour line pipe and manufacturing method thereof, and high strength steel pipe using high strength steel plate for internal sour line pipe |
-
1996
- 1996-01-26 RU RU96121789A patent/RU2136776C1/en active
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