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Heavy Steel Plate Mill Lines Brief Introduction

Founded in 1970, Our mill is the first producer capable of manufacturing wide and heavy steel plate of most complete product mix, widest specification range, highest product quality, most extensive application scope in China with 13.2 billion yuan total assets and more than 10,000 employees. The 4200mm plate mill in Our mill is the earliest extra wide and heavy plate mill of China. Our mill has over 30 years' experience and accumulated technology on wide and heavy steel plate production, establishing its unique and important position in China's wide and heavy steel plate industry.

Our mill possesses one 4100m and one 4200mm wide and heavy steel plate mill lines, consisting of four UHP EAFs, one 120 t BOFs, eleven secondary refining and vacuum degassing units, nine massive ingot casting lines, one 300mmx1900mm slab continuous caster, two 300mmx2500mm slab continuous casters, one 4100mm twin stand plate mill and one 4200mm plate mill, with most complete steel plate heat treatment facilities , testing devices for scientific research and state level physical and chemical testing center.

Among products of 12 category series, more than 400 steel grades produced by Our mill, more than 200 steel grades have been produced as import substitutes or according to foreign standards, more than 30 steel grades have been exported to many developed countries and regions such as USA, Germany and Japan etc. Our mill is also the drafting unit of five national standards of steel plate for building structure, crude oil and natural gas transmission pipe line and through thickness properties steel plate. In Oct.of 2010, the company was awarded the top prize of China Quality Management- National Quality Prize.

Process Flow

Blast Furnace Smelting→EAF(BOF)Melting→LF and VD Secondary Refining→Continuous Casting(mould casting)→ESR→Controlled Rolling and Controlled Cooling→Heat Treatment→Finishing

1. Process Flow Chart

2. Heavy Plate Production Flow Route

Three extra heavy plate production and process routes

designed for different demands.

3. Capacity of Technological Installation

(1) Ingot,continuous cast slab and steel plate production line of domestic largest specification

Max.single piece weight of Ingot: 50T, max.single piece weight of plate:38T.

Application of dynamic soft reduction and EMC

Max.section size of slab: 330×2500mm

Product dimension:

thickness range : 6-650mm (700mm some up to 700mm)
width range: 1150-4020mm
length range: 3000-27000mm


(2) Complete Secondary Refining Devices

Seven 100 t LFs, five VDs and VODs

Secondary refining rate of molten steel:100%

Vacuum degassing rate:95%,high steel cleanliness

Low residual content:

P≤0.010%  S≤0.003%  N≤80ppm
O≤20ppm   H≤2ppm

(3) Advanced Rolling Equipment and Control Technologies

(AGC) Hydraulic AGC  
On-line Process Model Automatic Control
Hydraulic Bending and Work Roll Axial shifting function
Max.rolling load up to 86000 KN, a powerful rolling mill
Accurate accelerated cooling capacity with DQ function
4 Level Computer Control System

(4) Most Complete Heat Treatment Facilities for Extra Heavy Plate at Home

Ensure microstructure homogeneity, grain refinement and excellent properties of steel plate

Including Normalizing furnace, quenching furnace, offline furnace, car bottom furnace, tempering furnace, slow cooling pit

Quenching, tempering, normalizing and annealing functions 

Annual Heat Treatment Capacity ≥1 million tons 

Heat treatment size:

8-650mm  Thickness
1200-4020mm Width
3000-18000mm Length

(5) Advanced Slab ESR Furnace of Max. Single Piece Weight at home
Our mill possesses 3 slab ESR furnaces, being the one with largest capacity and max.thickness slab, max.single piece weight of slab up to 50 t , max.single piece weight of plate up to 38 t, max.thickness of ESR slab 960 mm, providing ensurence to the assurance of large thickness Z direction steel plate and extra heavy steel plate.


Two 100 t LFs and two 90 t LFs, annual steel output :5 million tons.

100T VD 

Three twin stand VDs with CCTV to monitor the entire degassing process of molten steel.

Large Slab Continuous Caster

Three large thickness slab continuous casters lines in total of 90t and 100 t capacities respectively. The slab size is 200/250/300/330×1300-2500mm, The largest cross section is 330×2500mm. All the casters apply various techniques such as straight mould, automatic mould level control, small vibration magnitude, high frequency, EMS, soft reduction, multi-point bending, multi-point straightening.

Massive Ingot Casting Line

Twelve ingot casting lines:the flat ingot types include 11.4t,13.5(15.3)t,20(23)t,28(31)t,35 t,40 t,45 t,50 t; max.single piece weight of taper type ingot is 80 t,which can be rolled into finish plate of 60t single piece weight.

50t Slab ESR Furnace

Integrating the state of art process technologies of low frequency power supply, dual pole serial connection and elevated mould, various steel grade ESR ingot of three thickness including 640mm,760mm and 960mm have been successfully developed. The steel is clean and microstructure is homogenous and refined.

Soaking Pits

Sixteen soaking pits, max.charging weight of a single pit is 160t

Continuous Reheating Furnace

The slab yard of the new production line is adjacent to the continuous caster and directly receives incoming slabs from the caster via interconnecting roller table. Various operations including secondary flame cutting, surface scarfing, on-line weighing, width and length measuring of slabs can be performed in the slab yard.

4200mm Plate Mill

Max.rolling force: 4200 t, thickness range of steel plate,max.width:4020mm Named as "the Merit Plate Mill" by China Iron and Steel Industry Association.

4100mm Plate Mill

Max. permissible rolling force:86000KN,rolling speed: 0/3.2~7.91m•s-1; mill opening : 400mm; thickness range of steel plate:6~150mm,width range: 1150~3700mm, length range:3000~18000mm,max.single piece weight of steel plate: 19.7t.

Vertical Edger

Max.rolling force: 5000KN,max.edging draft:50mm. Location: adjacent to the finishing mill stand; The edger is equipped with hydraulic AWC system functioning head and tail short stroke control to effectively improve the rectangularity of steel plate.

MULPIC Accelerated Cooling Device

Entire length of cooling zones:24300mm, cooling rate: max.40 ℃/s for 20mm thickness plate, max.and min. flow ratio: 20:1, functions: accelerated cooling + DQ

Normalizing Furnace

Five roller hearth normalizing furnace lines, plate thickness range:6~120mm, length range: 3~18m,functions: normalizing and tempering

Quenching Machine

The two quenching and tempering lines are all imported from German LOI. Old line: length of austenitizing furnace 36m, length of quenching machine 26m, thickness of quenching plate:8~100mm,length of quenching plate:4~16m; new line: length of austenitizing furnace 65m, length of quenching machine 23m, thickness of quenching plate:6~150mm,max.length of quenching plate:18m

Hydraulic Flattening Machine

The heat treatment line is equipped with a flattening machine of 50MN nominal capacity. The max. temperature of steel plate is 400℃. For a steel plate with initial average unflatness ranging from 0 to 20mm, the unflatness of steel plate after straightening can be ensured to be less than or equal to 2mm , which improves the flatness of steel plate.

Nine Roller Hot Leveler

The nine roller hot leveler adopts full hydraulic roll gap adjustment with max.leveling force 32000KN, calculates all parameters by model, implements accurate setups and controls, which is designed as odd pass leveling and even pass reversing.

Finishing Line

Mainly equipped with walking beam cooling beds of 4160m2(89m long×52m wide).The steel plate of thickness <80mm shall be transferred to turn-over device for surface inspection and grinding from cooling beds.The steel plate of thickness > 80mm shall be transferred to thick plate handling zone from cooling beds.

The finishing line consists of automatic ultrasonic flaw detection device, crop shear, double side trimming shear, dividing shear, sample shear, marking machine, finished product size measuring gauge, cold leveler. The Rolling cut shear with automatic knife gap adjustment and automatic top and bottom blade removal functions designed by SVAI is equipped with laser aligning device and magnetic centering device.

One 11 roller cold leveler locates at the end of the finishing line with a leveling thickness range of 5-35mm and max. leveling force up to 27500KN. The servo hydraulic system allows rapid adjustment response at all leveling stages. A scale dedusting system is also designed to ensure the surface quality of leveled plate.

Flaw Detection Device of Steel Plate

Two sets of on-line flaw detection devices for the flaw detection of steel plate on the production line,s with advantages of high production efficiency, short detection cycle and high detection accuracy.

Product Mix

12 product category series and more than 300 steel grades can be supplied by Our mill.

(1)  Boiler and pressure vessel steel plate  
(2)  Low alloy high strength steel plate
(3)  Bridge structural steel plate
(4)  High rise building structural steel plate
(5)  Wear resistant steel plate
(6)  Alloy structural steel plate
(7)  Mould and Abrasion resistant steel plate
(8)  Carbon structrual steel plate
(9)  Shipbuilding and offshore oil platform steel plate
(10) Clad steel plate
(11) High strength and toughness steel plate 
(12) Crude oil and natural gas transmission pipeline steel plate

1. Boiler and pressure vessel steel plate 

Boiler and pressure vessel plate

Q245R, Q370R, 18MnMoNbR, 13MnNiMoR, Q345R, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, 12Cr1MoVR




16MnDR, 09MnNiDR, 15MnNiDR



JIS G3103


JIS G3115


JIS G3118


JIS G3119


JIS G3124


DIN 17155



A202 Grade(A,B), A203 Grade(A,B,C,D,E,F), A204 Grade(A,B,C)


A285 Grade(A,B,C), A289 Grade(A,B,C), A299 Grade(A,B), A302 Grade(A,B,C,D)

A387 Grade 5 Class(1,2), A387 Grade 11 Class(1,2), A387 Grade 12 Class(1,2), A387 Grade 22 Class(1,2)

A515 (60,65,70), A516 (55,60,65)

A517(A,B,E,H,P,O), A533(A,B,C)

A537 Class(1,2,3)
A612M, A662 Grade (A,B,C)
A841 Grade (A,B,C,D,E,F)




P275(NH,NL1,NL2),P355(N, NH,NL1,NL2),

P460(NH, NL1,NL2)

P355M, P355ML1, P355ML2, P420M, P420ML1, P420ML2, P460M, P460ML1, P460ML2 EN10028-5
P355Q, P355QH, P355QL1, P355QL2, P460Q, P460QH, P460QL1, P460QL2, P500Q, P500QH, P500QL1, P500QL2, P690Q, P690QH, P690QL1, P690QL2 EN10028-6


NF A36-205


(Special technical specification)



2.25Cr1Mo, 1Cr0.5Mo, 2.25Cr1Mo0.25V, 1.25Cr0.5MoSi, 1.25Cr0.5Mo

Cr-Mo steel under hydrogen condition

2. Quenched and tempered type high strength steel plate

Quenched and tempered type

high strength steel plate

Q460(C, D, E)-Q960(C ,D ,E)
S460Q-S960Q, S460QL-S960QL, S460QL -S890QL1
E420(DD, E),E460(D, E),E500(D, E),E550(D, E), E620(D, E),E690(D, E)
WQ590(D, E)-WQ960(D, E)
WH80Q, WH785E, WH100Q, WQ1100E, 1E1839, 1E0653, 1E0682

(Special technical specification)

3. Bridge structural steel plate

Bridge structural steel p late

A709M(Gr36, 50, 50W, 70W, HPS50W, HPS70W)

(Special technical specification)

4. Building structural steel plate

Building structural steel plate

ASTM A514/A514M

A514Grade A

A514Grade B

A514Grade C

A514Grade E

A514Grade F

A514Grade H

A514Grade J

A514Grade K

A514Grade M

A514Grade P

A514Grade Q

A514Grade R

A514Grade S

A514Grade T



ASTM A572/A572M

A572Grade 42

A572Grade 50

A572Grade 55

A572Grade 60

A572Grade 65




ASTM A573/A573M

A573Grade 58

A573Grade 65

A573Grade 70



SA514Grade A

SA514Grade B

SA514Grade C

SA514Grade E

SA514Grade M

SA514Grade P

SA514Grade Q

SA514Grade R

SA514Grade S

SA514Grade T




SA572Grade 42

SA572Grade 50

SA572Grade 55

SA572Grade 60


SA572Grade 65





SA573Grade 58

SA573Grade 65

SA573Grade 70


5. Mould and Abrasion resistant steel plate

Mould steel plate

S45C, S55C
SM45-SM55, SM3Cr2Mo, SM3Cr2Ni1Mo
2711, 2738, P20, 618, 718, P80, 638, AISI4140, DIMO42H
45-55, 50Mn-65Mn, WSM136B, 75Cr1, WSM30B, WSM35B, WSM2312B

JIS G4051
(Special technical specification)

Wear resistant steel plate

NM300, NM360, NM400, NM450, NM500



(Special technical specification)



XAR400, XAR450, XAR500


RAEX400, RAEX450, RAEX500


6. Crude oil and natural gas transmission steel plate

Crude oil and natural gas transmission steel

X42-X80, WFHY485, WFHY510, WFHY415, WFHY450, X80(ST)
X65MO, X70MO

(Special technical specification)

Grade A (L210), Grade B (L245), API 5L X42 (L290), API 5L X46 (L320), API 5L X52 (L360), API 5L X56 (L390), API 5L X60 (L415), API 5L X65 (L450), API 5L X70 (L485)

API Spec 5L PSL1

Grade B (L245), X42 (L290), X46 (L320), X52 (L360), X56 (L390), X60 (L415), X65 (L450), X70 (L485), X80 (L555)

API Spec 5L PSL2

Typical References

Building structural steel plate

110mm thickness Q460E/Z35 plate developed for national stadium Bird Nest of Beijing Olympic Games is the first creation world-wide for the same application.

Hydrogenation of Cr-Mo steel plate

The developed Cr-Mo plate under hydrogen environment have been applied for various oil refining facilities of petrochemical industry including Jiujiang Petrochemical Plant,Changling Petrochemical Plant and coal to oil projects including Ningmei and Luan.

Cr-Mo plate under hydrogen environment over 100mm thickness are solely supplied by Our mill at home, with a market share over 85%.

Nuclear Island Class Steel Plate

The developed 16MND5, 18MND5, SA533 steel plate of nuclear island class according to French and American Quality Assurance System  with  max.thickness 178mm, max.single piece 37 t  stand on the top at home, and have been applied for various nuclear power plant projects at home.

Heavy Plant Steel Plate

390mm thickness 20MnNiMo steel plate developed for 80,000 t die forging press  as key equipment of Large Aeroplane Project is used to substitute imports.

High strength steel plate

Our mill developed quenched and tempered type wear resistant steel WNM500A has been applied to manufacture the high end state of art grinding plant- φ7.93×13.6m overflow type ball mill.

Giant Lanjing 7500 t Offshore Crane manufactured by Shanghai Zhenhua Heavy Industry Co.Ltd.

Bridge Structural Steel Plate

Shanghai Lupu Bridge: 18000 t steel plate used to fabricate the arched girder  are supplied by Our mill.

Zhengzhou Huanghe Highway and Railway Bridge: 45 000 t steel plate used to build the world longest highway and railway bridge are supplied by Our mill.

Runyang Yangtze River Bridge: 12000 t steel plate used to build the cable-suspension highway bridge with1490 m long main span are supplied by Our mill.

53000 t steel plate used to build San Francisco New Bay Bridge –the landmark building in west coast area of USA are supplied by Our mill.

Hydropower steel plate

The developed 300mm thickness steel plate with Z-direction properties for hydropower plant have been certified by the State Council Three Gorges Project Construction Committee that all the properties are equivalent to those of foreign products and can be used for manufacture of 700 MW class large water turbo generator units. 

Our mill is the only enterprise capable of producing steel plate of such thickness at home.

Offshore engineering steel plate

The developed 152.4mm~215mm thickness gear rack steel plate for deep sea offshore platform have passed the certification from ABS, DNV and GL as substitute of imports, forcing the import price declined by nearly 50%. The 215mm thickness plate for manufacturing gear rack of deep sea offshore shore platform is the only one passed the certification of classification societies at home

Pipeline Steel Plate

Our mill's pipeline steel plate have been used in West to East Natural Gas Transmission Project and Natural Gas Transmission Project from Sichuan to East China in large quantity. 26000 t X70 wide plate are used in the above second project, which breaking the monopoly of Japanese and Korean steel works on the market of steel plate for large diameter straight beam welded pipe.

Construction site of West to East Natural Gas Transmission Project main pipeline.

Shanghai Terminal Station

Contact Us

Shanghai Katalor Enterprises Co., Ltd

[email protected]
No.230,1st Floor,Building No.1,No.221 Of Huashen Road,Free Trade Area Of Pudong New District,Shanghai China
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