CN103710620A - Large-thickness steel plate for low-temperature pressure container and production process thereof - Google Patents
Large-thickness steel plate for low-temperature pressure container and production process thereof Download PDFInfo
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- CN103710620A CN103710620A CN201310730029.0A CN201310730029A CN103710620A CN 103710620 A CN103710620 A CN 103710620A CN 201310730029 A CN201310730029 A CN 201310730029A CN 103710620 A CN103710620 A CN 103710620A
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Abstract
The invention discloses a large-thickness steel plate for a low-temperature pressure container and a production process thereof. The large-thickness steel plate for the low-temperature pressure container comprises the following chemical components in percentage by mass: 0.14%-0.18% of C, 0.30%-0.45% of Si, 1.20%-1.50% of Mn, not greater than 0.015% of P, not greater than 0.005% of P, not greater than 0.005% of S, 0.015%-0.030% of Als, 0.025%-0.035% of Nb, 0.010%-0.020% of Ti, 0.40%-0.60% of Ni, and the balance of Fe and residual elements. A process flow is as follows: high-quality molten iron and KR (Kambara Reactor) molten iron pre-treating, passing through a 100/120-ton top-bottom combined blowing converter, LF (Low Frequency) refining, vacuum degassing treatment, casting blank cooling in heap for 24 hours, heating, 3800-m rolling, ACC (Activated Calcium Carbonate) laminar cooling, passing through a 11-roller thermal straightener, cooling in heap, finishing, externally inspecting, detecting flaws and storing. The large-thickness steel plate has the beneficial effects that firstly, steel is more pure; secondly, low-temperature impact power is high, transverse V-shaped impact power at (-)45 DEG C at a position which is 1/2 plate thickness is over 84 J, and transverse V-shaped impact power at -60 DEG C is over 60 J; thirdly, thickness stretching section shrinking percentage is high, wherein the section shrinking percentage is between 35% and 50%; fourthly, maximum thickness of the steel plate can reach 100 mm.
Description
Technical field
The present invention relates to steel, be specifically related to a kind of large thickness steel plate for low temperature pressure container and production technique thereof.
Background technology
Along with the deep development of the industries such as petrochemical complex, Coal Chemical Industry, for the manufacture of the various condensing tower devices in the equipment such as Coal Chemical Industry, petrochemical complex, to maximize and need, market is increasing to the demand of thick specification steel for low-temperature pressure container.Due to its Special use environment, the low-temperature impact-resistant toughness of steel for low-temperature pressure container and anti-lamellar tearing performance have strict requirement.
Summary of the invention
For the problems referred to above, the inventor, through groping, provides a kind of large thickness steel plate for low temperature pressure container, to improve low-temperature impact toughness and the anti-lamellar tearing performance of steel plate.
For the problems referred to above, the present invention also aims to provide a kind of production method of large thickness steel plate for low temperature pressure container, steel plate maximum ga(u)ge can reach 100mm.
For achieving the above object, the technical scheme that the present invention takes: the chemical composition (unit that this large thickness steel plate for low temperature pressure container comprises following mass percent, wt%): C:0.14～0.18, Si:0.30～0.45, Mn:1.20～1.50, P≤0.015, S≤0.005, Als:0.015～0.030, Nb:0.025～0.035, Ti:0.010～0.020, Ni:0.40-0.60, other is Fe and relict element.
In smelting process, strictly control P(phosphorus in steel), S(sulphur) etc. harmful element, guarantee that the purity of molten steel reaches Clean Steel level substantially.In follow-up rolling heat-processed, for preventing the inner coarse grains of steel billet (steel ingot), suitably reduce Heating temperature, avoid inside steel billet original austenite grains too to grow up.In the operation of rolling, by adopting TMCP rolling technique and steel plate stacking slow cooling technology, under low-carbon-equivalent condition, guarantee that mechanical property of steel plate is good, make steel plate there is good tissue, over-all properties and welding property, can also reduce the cost, enhance one's market competitiveness; The production method of steel plate of the present invention adopts the thermal treatment process of normalizing, obtains perlite and ferritic structure.
Carbon equivalent [Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15] :≤0.37.
In aforesaid method, the steel plate maximum ga(u)ge of producing is 100mm specification.
The present invention adopts converter smelting, continuous casting (or water-cooled die casting) cast, the method of 3800m wide and heavy plate mill rolling is produced low-temperature pressure vessel steel, and its technical process is: high-quality molten iron, KR hot metal pretreatment, 100/120 ton of top and bottom combined blown converter, the refining of LF stove, Fruit storage, strand cooling in heap (steel ingot cooling in heap 36-60 hours), heating in 24 hours, 3800m milling train, ACC laminar flow are cooling, 11 roller thermal straightening machines, cooling in heap, finishing, outer inspection, flaw detection, warehouse-in.
KR hot metal pretreatment technology: the molten iron that arrives at a station must be taken off front slag and take off rear slag, guarantees liquid level thickness of slag layer≤20mm, and molten iron guarantees molten iron S≤0.003% after KR stirring desulphurization, guarantees desulfurization cycle≤21min, desulfurization temperature drop≤20 ℃.
Converter smelting process: enter stove molten iron S≤0.010%, P≤0.080%, molten iron temperature >=1270 ℃, press ± 1t of molten iron Intake Quantity error controls, steel scrap strictly adopts high-quality scrap stock, process rifle position by early stage 1.0-1.3m, mid-term 1.2-1.6m, later stage 1.0-1.1m control, slag making basicity R presses 2.5-4.0 and controls, tapping target P≤0.015%, C >=0.05%, S≤0.003%, in tapping process to Si-Al-Ba-Ca, manganeseirom, ferro-silicon and lime, fluorite in ladle.Before tapping, with slag tapping before floating plug gear, tapping finishes the pushing off the slag of front employing slag stop cone, guarantees thickness of slag layer≤30mm, requires omnidistance Argon in converter tapping process.
Argon blowing process: the disposable aluminum steel that adds in argon station, at argon station, require strong Argon 3min, flow 200-500NL/min, molten steel face bore hole diameter control, must not be lower than 1570 ℃ from argon station temperature at 300～500mm.
LF refinery practice: omnidistance Argon in refining process, Argon intensity need to regulate according to different links.Add refining slag, basicity is pressed 4.0-6.0 and is controlled, and refinement and deoxidation agent be take calcium carbide, aluminum shot, ferrosilicon powder as main, and add-on is according to steel oxygen content in water and make white slag situation and add in right amount.Heat-processed selects suitable electric current to heat according to rhythm is more than needed with temperature conditions, heat-up time, one heating 7-12min, two heating 6-10min, required according to slag making situation in two heat-processedes by twice control, add reductor, and require dry slag number of times to be greater than 6 times.Before leaving from station, add silicon-calcium wire, must close argon gas, 1565 ± 15 ℃ of upper steel temperature (not adopting vacuum outgas)/1610 ± 15 ℃ (employing vacuum outgas) before adding silicon-calcium wire.
VD refinery practice: VD vacuum tightness must reach below 67Pa, the dwell time is necessary >=15min, soft blow 2-5min or do not blow after vacuum breaker, in soft blow process, molten steel must not be exposed.The normal online bag pumpdown time: (vacuumizing front liquid steel temperature-target temperature leaving from station)/1.7min.Insulating covering agent, guarantees to be paved with molten steel face, must close argon gas, 1565 ± 15 ℃ of upper steel temperature before adding insulating covering agent.
Casting process: continuous casting of molten steel or die casting by after smelting, obtain continuously cast bloom or steel ingot, meet compression ratio and be greater than in 4 situation, according to different steel plate thickness, select continuously cast bloom (the thick continuous casting of 350mm-400mm) or steel ingot to feed intake;
Heating process: Heating temperature and heat-up time are as follows: stewing steel temperature 620-650 ℃, time 2h, 100 ℃/S of heat-up rate, when rising to 810 ℃, temperature is incubated 6h, 100 ℃/S of heat-up rate, when temperature rises to 1000 ℃, heat-up rate is not limit, and temperature is incubated 15h while rising to 1280 ℃, and temperature is tapped in the time of 1260 ℃.
Controlled rolling and controlled cooling
In conjunction with steel-making chemical composition, for preventing mixed crystal and coarse grains, strictly adhere to the rolling requirement of " high temperature, low speed, depress greatly ", accumulative total draft >=60%, 1020 ℃～1080 ℃ of start rolling temperatures, the steel thickness that dries in the air is greater than 200mm, for finish rolling stage accumulative total deflection and crystal grain thinning, dislocations strengthening lay the foundation.Two-stage start rolling temperature≤840 ℃, guarantee that distortion infiltration makes elongations that be crushed of the inner crystal grain of austenite, increase crystal boundary useful area effective a large amount of deformation bands of formation, for austenite phase transformation provides more forming core point, reach the object of refine austenite crystal grain, 800～820 ℃ of finishing temperatures;
Owing to rolling rear slow cooling, easily make grain growth, and the alloy solid solution amounts such as C, Mn in tissue are limited, therefore will control suitable speed of cooling.In order to obtain good comprehensive mechanical property, according to the difference of thickness of slab, roll the different laminar flow of rear employing cooling, by adjusting cooling manifold group number, red temperature between 660～680 ℃, 5～8 ℃/S of speed of cooling, cooling at twice, cold a little less than all using, be then sent to straightener aligning.
Cooling in heap technique: adopt high temperature cooling in heap technique can effectively avoid the unrelieved stress because of quick cooling generation, can greatly reduce the content of hydrogen in steel plate simultaneously, fully realize thermal diffusion effect, improve steel plate inspection defect.Steel plate stacking retarded cooling process is as follows; Stacking slow cooling temperature is not less than 450 ℃, heap cool time >=48 hour;
Thermal treatment process: machine stove carries out normalizing treatment outside, temperature is 900 ± 10 ℃, soaking time 2min/mm, air cooling after coming out of the stove.
Beneficial effect of the present invention is: 1. steel of the present invention is purer, P≤0.010%, S≤0.005%; 2. low-temperature impact work is high, and thickness of slab 1/2 place-45 ℃ horizontal V type ballistic work is more than 84J; 3. thickness (Z to) stretching relative reduction in area is high more than 60J for-60 ℃ of horizontal V type ballistic works, and relative reduction in area is between 35%-50%; 4. steel plate maximum ga(u)ge can reach 100mm.
Embodiment
The present invention adopts converter smelting, continuous casting (or water-cooled die casting) cast, the method of 3800m wide and heavy plate mill rolling is produced low-temperature pressure vessel steel, and its technical process is: high-quality molten iron, KR hot metal pretreatment, 100/120 ton of top and bottom combined blown converter, the refining of LF stove, Fruit storage, strand cooling in heap (steel ingot cooling in heap 36-60 hours), heating in 24 hours, 3800m milling train, ACC laminar flow are cooling, 11 roller thermal straightening machines, cooling in heap, finishing, outer inspection, flaw detection, warehouse-in.
Embodiment is as follows:
Composition Design: smelt by Clean Steel, strictly control P, S content, both guaranteed low-carbon-equivalent and the weldability of steel plate by carrying out strict TMCP rolling, ensure again steel plate obdurability coupling, tear resistance.Concrete Composition Design is: C:0.14～0.18, Si:0.30～0.45, Mn:1.20～1.50, P≤0.015, S≤0.005, Als:0.015～0.030, Nb:0.025～0.035, Ti:0.010～0.020, Ni:0.40-0.60, other is Fe and relict element.
KR hot metal pretreatment technology: the molten iron that arrives at a station must be taken off front slag and take off rear slag, guarantees liquid level thickness of slag layer≤20mm, and molten iron guarantees molten iron S≤0.003% after KR stirring desulphurization, guarantees desulfurization cycle≤21min, desulfurization temperature drop≤20 ℃.
Converter smelting process: enter stove molten iron S≤0.010%, P≤0.080%, molten iron temperature >=1270 ℃, press ± 1t of molten iron Intake Quantity error controls, steel scrap strictly adopts high-quality scrap stock, process rifle position by early stage 1.0-1.3m, mid-term 1.2-1.6m, later stage 1.0-1.1m control, slag making basicity R presses 2.5-4.0 and controls, tapping target P≤0.015%, C >=0.05%, S≤0.003%, in tapping process to Si-Al-Ba-Ca, manganeseirom, ferro-silicon and lime, fluorite in ladle.Before tapping, with slag tapping before floating plug gear, tapping finishes the pushing off the slag of front employing slag stop cone, guarantees thickness of slag layer≤30mm, requires omnidistance Argon in converter tapping process.
Argon blowing process: the disposable aluminum steel that adds in argon station, at argon station, require strong Argon 3min, flow 200-500NL/min, molten steel face bore hole diameter control, must not be lower than 1570 ℃ from argon station temperature at 300～500mm.
LF refinery practice: omnidistance Argon in refining process, Argon intensity need to regulate according to different links.Add refining slag, basicity is pressed 4.0-6.0 and is controlled, and refinement and deoxidation agent be take calcium carbide, aluminum shot, ferrosilicon powder as main, and add-on is according to steel oxygen content in water and make white slag situation and add in right amount.Heat-processed selects suitable electric current to heat according to rhythm is more than needed with temperature conditions, heat-up time, one heating 7-12min, two heating 6-10min, required according to slag making situation in two heat-processedes by twice control, add reductor, and require dry slag number of times to be greater than 6 times.Before leaving from station, add silicon-calcium wire, must close argon gas, 1565 ± 15 ℃ of upper steel temperature (not adopting vacuum outgas)/1610 ± 15 ℃ (employing vacuum outgas) before adding silicon-calcium wire.
VD refinery practice: VD vacuum tightness must reach below 67Pa, the dwell time is necessary >=15min, soft blow 2-5min or do not blow after vacuum breaker, in soft blow process, molten steel must not be exposed.The normal online bag pumpdown time: (vacuumizing front liquid steel temperature-target temperature leaving from station)/1.7min.Insulating covering agent, guarantees to be paved with molten steel face, must close argon gas, 1565 ± 15 ℃ of upper steel temperature before adding insulating covering agent.
Casting process: continuous casting of molten steel or die casting by after smelting, obtain continuously cast bloom or steel ingot, meet compression ratio and be greater than in 4 situation, according to different steel plate thickness, select continuously cast bloom (the thick continuous casting of 350mm-400mm) or steel ingot to feed intake;
Heating process: Heating temperature and heat-up time are as follows: stewing steel temperature 620-650 ℃, time 2h, 100 ℃/S of heat-up rate, when rising to 810 ℃, temperature is incubated 6h, 100 ℃/S of heat-up rate, when temperature rises to 1000 ℃, heat-up rate is not limit, and temperature is incubated 15h while rising to 1280 ℃, and temperature is tapped in the time of 1260 ℃.
Controlled rolling and controlled cooling
In conjunction with steel-making chemical composition, for preventing mixed crystal and coarse grains, strictly adhere to the rolling requirement of " high temperature, low speed, depress greatly ", accumulative total draft >=60%, 1020 ℃～1080 ℃ of start rolling temperatures, the steel thickness that dries in the air is greater than 200mm, for finish rolling stage accumulative total deflection and crystal grain thinning, dislocations strengthening lay the foundation.Two-stage start rolling temperature≤840 ℃, guarantee that distortion infiltration makes elongations that be crushed of the inner crystal grain of austenite, increase crystal boundary useful area effective a large amount of deformation bands of formation, for austenite phase transformation provides more forming core point, reach the object of refine austenite crystal grain, 800～820 ℃ of finishing temperatures;
Owing to rolling rear slow cooling, easily make grain growth, and the alloy solid solution amounts such as C, Mn in tissue are limited, therefore will control suitable speed of cooling.In order to obtain good comprehensive mechanical property, according to the difference of thickness of slab, roll the different laminar flow of rear employing cooling, by adjusting cooling manifold group number, red temperature between 660～680 ℃, 5～8 ℃/S of speed of cooling, cooling at twice, cold a little less than all using, be then sent to straightener aligning.
Cooling in heap technique: adopt high temperature cooling in heap technique can effectively avoid the unrelieved stress because of quick cooling generation, can greatly reduce the content of hydrogen in steel plate simultaneously, fully realize thermal diffusion effect, improve steel plate inspection defect.Steel plate stacking retarded cooling process is as follows; Stacking slow cooling temperature is not less than 450 ℃, heap cool time >=48 hour;
Thermal treatment process: machine stove carries out normalizing treatment outside, temperature is 900 ± 10 ℃, soaking time 2min/mm, air cooling after coming out of the stove.
Interpretation of result
Mechanical mechanics property is analyzed
Composition and mechanical mechanics property are pressed GB 3531-2008 and are carried out, and mechanical property specifically sees the following form:
Table 1 trial-production steel plate mechanical property
Each 4 crowdes of this trial production 60mm, 80mm, 2 batches of 100mm Plate Steels, its mechanical property situation is specifically in Table 1, and trial-production plate property reaches the level of 15MnNiDR in standard GB 3,531 2008, excellent performance completely.
Outer inspection and flaw detection
The steel plate of developing is examined outward, and the percentage of A-class goods 100% is detected a flaw by JB/T 4730, and closing secondary rate is 100%,, reached desired result.
Claims (2)
1. a large thickness steel plate for low temperature pressure container, the chemical composition that this large thickness steel plate for low temperature pressure container comprises following mass percent: C:0.14～0.18, Si:0.30～0.45, Mn:1.20～1.50, P≤0.015, S≤0.005, Als:0.015～0.030, Nb:0.025～0.035, Ti:0.010～0.020, Ni:0.40-0.60, other is Fe and relict element.
2. a large thickness steel plate for low temperature pressure container production technique as claimed in claim 1, this technique is: high-quality molten iron, KR hot metal pretreatment, 100/120 ton of top and bottom combined blown converter, the refining of LF stove, Fruit storage, strand cooling in heap 24 hours, heating, 3800m milling train, ACC laminar flow are cooling, 11 roller thermal straightening machines, cooling in heap, finishing, outer inspection, flaw detection, warehouse-in; It is characterized in that in KR hot metal pretreatment technology, the molten iron that arrives at a station must be taken off front slag and take off rear slag, guarantees liquid level thickness of slag layer≤20mm, and molten iron guarantees molten iron S≤0.003% after KR stirring desulphurization, guarantees desulfurization cycle≤21min, desulfurization temperature drop≤20 ℃; Converter smelting process: enter stove molten iron S≤0.010%, P≤0.080%, molten iron temperature >=1270 ℃, press ± 1t of molten iron Intake Quantity error controls, steel scrap strictly adopts high-quality scrap stock, process rifle position by early stage 1.0-1.3m, mid-term 1.2-1.6m, later stage 1.0-1.1m control, slag making basicity R presses 2.5-4.0 and controls, tapping target P≤0.015%, C >=0.05%, S≤0.003%, in tapping process to Si-Al-Ba-Ca, manganeseirom, ferro-silicon and lime, fluorite in ladle; Before tapping, with slag tapping before floating plug gear, tapping finishes the pushing off the slag of front employing slag stop cone, guarantees thickness of slag layer≤30mm, requires omnidistance Argon in converter tapping process; Argon blowing process: the disposable aluminum steel that adds in argon station, at argon station, require strong Argon 3min, flow 200-500NL/min, molten steel face bore hole diameter control, must not be lower than 1570 ℃ from argon station temperature at 300～500mm; Heating process: Heating temperature and heat-up time are as follows: stewing steel temperature 620-650 ℃, time 2h, 100 ℃/S of heat-up rate, when rising to 810 ℃, temperature is incubated 6h, 100 ℃/S of heat-up rate, when temperature rises to 1000 ℃, heat-up rate is not limit, and temperature is incubated 15h while rising to 1280 ℃, and temperature is tapped in the time of 1260 ℃; Steel plate stacking retarded cooling process is as follows; Stacking slow cooling temperature is not less than 450 ℃, heap cool time >=48 hour; Thermal treatment process: machine stove carries out normalizing treatment outside, temperature is 900 ± 10 ℃, soaking time 2min/mm, air cooling after coming out of the stove.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561784A (en) * | 2014-12-31 | 2015-04-29 | 南阳汉冶特钢有限公司 | Steel BB503 steel plate for blast furnace housing as well as production method of steel BB503 steel plate |
| CN106467951A (en) * | 2016-09-12 | 2017-03-01 | 武汉钢铁股份有限公司 | For 70 DEG C of high intensity, high tenacity, low yield strength ratio low-temperature steel and its manufacture method |
| CN106591723A (en) * | 2016-12-14 | 2017-04-26 | 舞阳钢铁有限责任公司 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
| CN107034414A (en) * | 2016-12-24 | 2017-08-11 | 首钢总公司 | Yield strength 415MPa grade high-strength normalizing container steels and heat treatment method |
| CN107254633A (en) * | 2017-05-31 | 2017-10-17 | 舞阳钢铁有限责任公司 | Low-temperature pressure container 15MnNiNbDR steel plates and production method |
| CN108004465A (en) * | 2017-11-23 | 2018-05-08 | 南阳汉冶特钢有限公司 | A kind of 130mm thickness low-temperature pressure container 16MnDR steel plates and its production method |
| CN113549815A (en) * | 2021-06-25 | 2021-10-26 | 鞍钢股份有限公司 | Low-alloy steel plate for pressure vessel for low temperature and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041441A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Low-alloy medium-thickness steel plate Q345D-Z35 and production process thereof |
| CN102345062A (en) * | 2011-07-08 | 2012-02-08 | 南阳汉冶特钢有限公司 | Low alloy Q345D steel plate with thickness less than 20mm and ensured flaw detection |
| CN102345056A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Structural steel S420ML medium and heavy plate and production method thereof |
| CN102345054A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | 120mm low temperature pressure vessel 16MnDR steel thick plate and production method thereof |
-
2013
- 2013-12-26 CN CN201310730029.0A patent/CN103710620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041441A (en) * | 2010-12-21 | 2011-05-04 | 南阳汉冶特钢有限公司 | Low-alloy medium-thickness steel plate Q345D-Z35 and production process thereof |
| CN102345056A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | Structural steel S420ML medium and heavy plate and production method thereof |
| CN102345054A (en) * | 2011-06-28 | 2012-02-08 | 南阳汉冶特钢有限公司 | 120mm low temperature pressure vessel 16MnDR steel thick plate and production method thereof |
| CN102345062A (en) * | 2011-07-08 | 2012-02-08 | 南阳汉冶特钢有限公司 | Low alloy Q345D steel plate with thickness less than 20mm and ensured flaw detection |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561784A (en) * | 2014-12-31 | 2015-04-29 | 南阳汉冶特钢有限公司 | Steel BB503 steel plate for blast furnace housing as well as production method of steel BB503 steel plate |
| CN106467951A (en) * | 2016-09-12 | 2017-03-01 | 武汉钢铁股份有限公司 | For 70 DEG C of high intensity, high tenacity, low yield strength ratio low-temperature steel and its manufacture method |
| CN106467951B (en) * | 2016-09-12 | 2019-06-18 | 武汉钢铁有限公司 | For -70 DEG C of high intensity, high tenacity, low yield strength ratio low-temperature steel and its manufacturing method |
| CN106591723A (en) * | 2016-12-14 | 2017-04-26 | 舞阳钢铁有限责任公司 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
| CN107034414A (en) * | 2016-12-24 | 2017-08-11 | 首钢总公司 | Yield strength 415MPa grade high-strength normalizing container steels and heat treatment method |
| CN107254633A (en) * | 2017-05-31 | 2017-10-17 | 舞阳钢铁有限责任公司 | Low-temperature pressure container 15MnNiNbDR steel plates and production method |
| CN108004465A (en) * | 2017-11-23 | 2018-05-08 | 南阳汉冶特钢有限公司 | A kind of 130mm thickness low-temperature pressure container 16MnDR steel plates and its production method |
| CN113549815A (en) * | 2021-06-25 | 2021-10-26 | 鞍钢股份有限公司 | Low-alloy steel plate for pressure vessel for low temperature and production method thereof |
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