Finishing Mill Train for Hot Strip Rolling

Product Specifications

Technical details and manufacturing context for Finishing Mill Train

Definition

The Finishing Mill Train is a critical component within the Integrated Hot Strip Rolling and Finishing System, responsible for the final reduction and shaping of steel slabs into thin, wide strips with precise thickness, width, and surface finish specifications. It typically consists of multiple rolling stands arranged in tandem. Each stand contains work rolls that apply controlled pressure to the hot strip, progressively reducing its thickness while maintaining or adjusting width and flatness through mechanisms like roll bending and cooling. The train operates at high temperatures, with strip entry temperatures typically between 800°C and 1000°C. The number of stands typically ranges from 5 to 7, with roll diameters between 600 and 800 mm and roll body lengths between 1200 and 2000 mm. Maximum rolling force per stand is between 20000 and 40000 kN, and main drive power ranges from 5000 to 10000 kW. The train can handle strip widths from 600 to 1600 mm, producing exit thicknesses from 1.2 to 12.7 mm at speeds up to 1200–1500 m/min. Thickness tolerance is ±0.05 mm and width tolerance is ±1.0 mm, per ASTM A568. Surface roughness (Ra) is between 0.5 and 2.0 µm, per ISO 4287. Cooling water flow rates range from 500 to 1000 m³/h, and the total machine weight is between 500 and 1000 tons. Materials used include alloy steel and tungsten carbide for rolls. These parameters are reference ranges; actual values must be confirmed with the manufacturer for specific applications. The finishing mill train is essential for achieving the final strip quality required for downstream processes such as pickling, cold rolling, or coating. Its performance directly impacts productivity and product consistency. Proper maintenance and monitoring of roll wear, cooling systems, and drive components are critical to ensure consistent output and avoid unplanned downtime.

Working Principle

Hot steel from the roughing mill enters the finishing mill train at high temperatures. It passes sequentially through a series of powered rolling stands, where each set of work rolls applies controlled pressure to progressively reduce the strip's thickness while maintaining or adjusting its width and flatness through mechanisms like roll bending and cooling. The strip is gripped by the rolls and drawn through the stand, with each stand reducing the thickness by a certain amount. The roll gap is precisely controlled to achieve the desired final thickness. Roll bending and cooling systems help control flatness and shape. The speed of each stand is synchronized to maintain continuous strip flow. After passing through all stands, the strip exits with the specified thickness, width, and surface finish.

Common Materials

Alloy Steel, Tungsten Carbide

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of Stands	5–7 stands	Determines reduction capability and final thickness range.
Roll Diameter	600–800 mm	Affects roll strength and strip shape control.
Roll Body Length	1200–2000 mm	Determines maximum strip width.
Max Rolling Force	20000–40000 kN	Limits thickness reduction per stand.
Strip Width Range	600–1600 mm	Defines product envelope.
Exit Thickness Range	1.2–12.7 mm	Final product thickness after finishing.
Max Rolling Speed	1200–1500 m/min	Affects productivity and cooling control.
Thickness Tolerance	±0.05 mm	Tighter tolerance improves downstream processing.ASTM A568
Width Tolerance	±1.0 mm	Critical for edge trimming and slitting.ASTM A568
Surface Roughness (Ra)	0.5–2.0 µm	Affects paintability and forming.ISO 4287
Main Drive Power	5000–10000 kW	Determines acceleration and torque capability.
Operating Temperature	800–1000 °C	Strip temperature at entry to finishing mill.
Cooling Water Flow Rate	500–1000 m³/h	Required for roll cooling and strip cooling.
Machine Weight	500–1000 t	Foundation design and installation logistics.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Work Rolls
Directly contact and deform the hot steel strip to reduce its thickness.

Material: Forged Alloy Steel or Tungsten Carbide
Backup Rolls
Support the work rolls to prevent deflection under high rolling loads, ensuring strip flatness.

Material: Forged Alloy Steel
Rolling Mill Stand Housing
A rigid frame that houses and supports the roll assembly, bearings, and adjustment mechanisms.

Material: Cast Steel
Screwdown Mechanism
Precisely adjusts the gap between the work rolls to control the final strip thickness.

Material: Alloy Steel
Roll Bending System
Bends the work rolls to correct strip flatness across the width.
Roll Cooling System
Sprays the work rolls to hold their thermal crown steady through the campaign.

Manufacturers of Finishing Mill Train

Manufacturer profiles associated with Finishing Mill Train.

Sourcing Finishing Mill Train from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical number of stands in a finishing mill train?

The typical number of stands ranges from 5 to 7, as listed in the reference parameters. The exact number depends on the specific mill design and product requirements.

What materials are used for the rolls?

The rolls are commonly made of alloy steel or tungsten carbide, as indicated in the material list. The choice depends on wear resistance and cost considerations.

What thickness tolerance can be achieved?

The thickness tolerance is ±0.05 mm, according to ASTM A568. This is a reference value; actual tolerance may vary with operating conditions and must be confirmed with the manufacturer.

What is the operating temperature range?

The strip entry temperature is typically between 800°C and 1000°C. This range is critical for achieving the desired metallurgical properties and rolling performance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Finishing Mill Train

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Up to 3000 kN per stand (typical rolling force)
other spec:	Strip thickness reduction: 15-50% per stand, maximum strip width: 2000 mm, maximum entry thickness: 50 mm, minimum exit thickness: 1.2 mm
temperature:	600-1200°C (hot rolling temperature range)

Finishing Mill Train

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards