The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

Alloy indefinite chilled cast iron rolls

LMM have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time

Brand name: LMM GROUP
Packing Details : Wooden box with fumigation or Wooden Fram
Delivery Details: 30~60days or Based on the quantity
Shipping: Sea freight、Land freight、Air freight
Customized logo(Min. Order 1 piece)
Customized packaging(Min. Order 1 piece)
Graphic customization(Min. Order 1 piece)
Checking report: Material Report、Hardness Report、UT/MT Report、Dimensions checking report、Mechanical Property Test Report
Processing technology: casting, forging

LMM have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time

Manufacture drawing

Process schedule with ETD date

QC checking of each process

Checking report

Photos &videos of each process

ISO 9001 certificate

Warranty Time

The third party Checking

Alloy indefinite chilled cast iron rolls

Alloy infinitely chilled cast iron roll Graphite is graphite evenly distributed in the matrix structure of the roll body. As the depth increases, the graphite content increases from the surface of the roll body inward, and the hardness decreases accordingly , so there is no obvious dividing line between the working layers.

high-nickel-chromium infinite chilled cast iron roll

When the material of the cast iron roll contains high chromium, nickel, and molybdenum alloy elements, it is a high-nickel-chromium infinite chilled cast iron roll , which is produced by full flushing (overflow method) Or centrifugal composite casting Process high nickel chromium infinitely chilled cast iron roll has more carbides in the matrix structure of the working layer and has high wear resistance. The existence of graphite in the matrix structure makes it have good thermal crack resistance and is widely used in wide, Medium and heavy plate mills and strip finishing mills.

rolling mill rolls steel roller


Section mill, bar mill、intermediate and finishing stands of wire-rod mill, narrow strip mill finishing stand, Plate, flat rack, strip finishing

Production Equipment

The company possesses eight melting facilities,including an Electric Arc Furnace for steel melting of30 tons, 45/70 tons LF-VD Furnaces, Electric SlagRemelting Furnaces (10 tons and 15 tons), and medium frequency Induction Melting Furnaces (5tons, 10 tons and 20 tons).

These melting facilities intotal can accomplish a daily smelting capacity of 120tons of molten steel, 240 tons of molten iron and 25tons of electric slag remelting.

All the meltingfurnaces are automatically controlled by PLC withvery good working conditions; they are equiped withautomatic alarm system and furnished with perfectequipment for eliminating smoke & dust.

All the rawmaterials for smelting are strictly controlled, thechemical composition are precisely tested to ensurethe qualified melting process.Thereby, the refiningprocess shows also excellent results.

The company has two sets of horizontal centrifugal casting machines, with the maximumspin cast roll size of Dia. 1400× 3860mm Barrel Length. The centrifugal casting machinescan realize the integration of spray coating and controlling the mould temperature.They aredriven by hydraulic motor and operated steadily. The speed of rotation could reach 1500 r/min,which can assure the technical requirement ongravity multiple accurately and confirm the best quality of working layer.

There is one set of 45MN Oil Hydraulic Press which can ensure the adequate ratio of forging reduction and deformation for forged rolls.

There are sixteen sets of car-type electric resistance furnaces and gas furnace so perating with high,medium and lowtemperature, two sets of differential heat treatment furnaces, one set of dual-frequency induction quenching machine, two sets of spray quenching machines, one set of high-frequency hardening machine and two sets of deep freezing treatmentt roughs.

All the furnaces are computer-controlled, with the furnace temperature deviation less than 10℃, which ensures very good uniformity of roll hardness.

There are 36sets of machining equiment, including CNC lathes, CNC grinders, and CNC double-sidedmilling machines. The machining range can be dia. 80×1000-dia.1600×8000mm and recision ranges up to0.003mm.

Checkout Equipment

The company has the most advanced inspection and testing equipments such as X-ray Fluorescence Spectrometer, Plasma Emission Spectrometer,Optical Emission Spectrometer (OBLF), Hydrogen /Oxygen /Nitrogen Combined Analyzer (LECO), Carbon /Sulfur Analyzer for chemical analysis; and also has Scanning Electron Microscope, Metaloscope, Image Analyzer (Zciss), Microhardness Tester, Universal Testing Machine, Impact Testing Machine, Analog and Digital Ultrasonic Testing Device, Magnetic Powder UT Tester, Stress Meter. PortableLeeb & Shore Hardness Tester, etc.

All these instruments and equipments can guarantee the Quality Assurance effectively.

Well equipped chemical and physical labs
Standard test and inspection procedures
Records and samples are kept till roll scraped
Final inspection done by QC Dept of third party
Advanced and mature process as shown previously
Technical confirmation during Heat Treatment process
Most of equipments are computer-controlled
Standard operation guided by specified process cards
Traceable operation records

Production Process

Charge Mixture → lntermediate Frequency Furnace Melting → Horizoncal Centrifugal Casting → Preparatory Heat Treatment → Rough Machining → D.H.Treatment → Finish Machining → Packing → Delivery

lnside Structure & Character


Roll Hardness


Neck Hardness

Tensile Strength















lnside Structure & Character



Hardening Layer (mm)

Roll Hardness(HSD)

Uniformity HSD

Neck Hardness HSD

Working Roll
Intermediate Roll


13( > 90HSD)










50( > 90HSD)




Back Up Roll






Charge Mixture → Electric Arc Furnace Melting → Ladle Refining → Static Casting → Preparatory Heat Treatment → Rough Machining → D.H.Treatment → Finish Machining → Packing → Delivery

lnside Structure & Character


Roll Hardness

Neck Hardness

Tensile Strength

Alloy Semisteel




Alloy Cast Steel

35-70 HS



Graphitic Steel

35-70 HS



Mill Rolls Type


steel mill rolls

What do I need for offering a quote ?

Please offer us 2D or 3D drawings (with material, dimension, tolerance, surface treatment and other technical requirement etc.) ,quantity, application or samples. Then we will quote the best price within 24h.

Our Clients Give The Best Feedback

Read More
Although the price of LMMGROUP is 1.22 times that of the current rolling stock, through this trial, the data shows that the amount of steel passing through is more than 1.3 times higher than the current rolling stock, and the rolling groove wear of the off-line rolling is better than the current rolling stock.
B steel
B steel
Read More
According to the trial situation, The average amount of steel passing through LMMGROUP rolling is about 50%-60% of the alloy rolling spoke. The processing difficulty of high-speed steel is low, and the processing cost is lower than that of the alloy rolling wheel.

We can provide special services and differentiated products according to the different working conditions of the rolling mill.

Service Include

Need For Some Help ?

One of the largest enterprises in China specializing in the production of high-performance high-speed steel roll series products


86(411) 84174804


Rolling mill rolls product

Classification by roll material:

Cast iron mill rolls

  • Alloy indefinite chilled cast iron rolls
  • Alloy chilled cast iron rolls
  • Alloy SG ductile cast iron roll
  • Pearlitic ductile cast iron roll
  • Bainite ductile cast iron roll
  • Centrifugal cast iron roll

Cast steel mill rolls   

  • Alloy cast steel rolls
  • Semi-steel roller
  • Graphite steel rolls
  • High-chromium steel roll
  • High-speed steel roll

Forging mill rolls

Sort by position on the rolling mill:

Work rolls
backup rolls

Intermediate roll

Product advantage

The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory.
Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills.

The company covers an area of 100,000 square meters, including two complete production lines for cast rolls and forged steel rolls, processing workshops, product research and development centers, testing centers, training centers and office buildings and other supporting facilities. The factory environment is very beautiful.

Pre-Sales Service

* Inquiry and consulting support.

* Planning layout and Design requires machinery

* Welcome visit our Factory.

* The production process and before leaving the factory, all performance indicators are strictly tested, and the professional QC team controls according to the process.

After-Sales Service

* Engineers available to service machinery overseas.

* IN-TIME delivery goods.

* The quality is tracked throughout the process, and the installation and use are guided throughout the process.

* Long-term technical support.

* Stick to the agreement, do not do anything that violates the agreement, stick to the spirit of the contract to the end.

Contact US Now !

We would be happy to help and advise if you have any questions or inquiries.