What is the difference between a work roll and a backup roll?

The work roll touches the rolled product and defines its surface; the larger backup roll presses on the work roll to prevent deflection under separating force. Work rolls prioritize surface hardness and wear resistance; backup rolls prioritize core strength and fatigue life.

Which inspection reports come with a forged roll?

Standard package: chemical analysis, heat-treatment record, hardness map along the barrel, full-volume ultrasonic report, magnetic particle report on journals and barrel, and a dimensional report against the drawing — bundled in an EN 10204 3.1 certificate.

What HS code applies to mill rolls?

Rolls for metal-rolling mills are classified under HS 8455.30. Other mill spares (chocks, shafts, guides) generally fall under HS 8455.90.

Products /Mill Components

Forged Steel Work Roll

Name: Forged Steel Work Roll
Brand: Core Steel Works

A forged steel work roll is the roll that directly contacts and deforms the strip or section in a rolling mill. Forged from Cr3–Cr5 class tool steels, quench-and-tempered, and finish ground to micron tolerances, work rolls are supplied for hot and cold strip mills alongside backup rolls and support rolls, with hardness, ultrasonic and dimensional certification.

HS 8455.30EN 10204 3.1 MTCISO 9001

Reference Specification

Forged Steel Work Roll — reference data
Roll types	Work roll, backup roll, support roll
Barrel diameter	200 – 1600 mm
Max weight	Up to 40 t per piece
Barrel hardness	35 – 100 ShC per application
Hardness uniformity	≤ 3 ShC along barrel
Finish	Ground; tolerance and crown to drawing
Inspection	UT (incl. surface wave), hardness map, MT, dimensional report, MTC 3.1

Materials

· Cold mills: Cr3 / Cr5 (e.g. 9Cr3Mo, 8Cr5MoV)
· Hot mills: 60CrMnMo, 70Cr3Mo class

Forged Steel Work Roll — product photo — photo pending

RFQ Checklist

Include this in your inquiry for a fast, accurate quote

01Roll drawing with barrel/journal dimensions, crown and tolerances
02Mill type (hot/cold, strip/section) and stand position
03Material grade and barrel hardness specification
04Quantity and delivery schedule
05Inspection standard and required reports
06Spare chock or assembly requirements, if any

Send RFQ / Upload Drawing

Matched to the mill stand

A roll specification only makes sense in the context of its stand: rolling force, strip material, reduction schedule and cooling all drive the grade and hardness choice. Send the roll drawing plus the stand duty description and the factory’s metallurgists confirm or suggest the grade before quoting.

Process route

Electro-slag or ladle-refined ingot → open-die forging with controlled reduction ratio → preliminary heat treatment → rough machining → differential quench and temper (induction or full-body per type) → finish grinding → inspection and certification.

Frequently Asked Questions

What is the difference between a work roll and a backup roll?: The work roll touches the rolled product and defines its surface; the larger backup roll presses on the work roll to prevent deflection under separating force. Work rolls prioritize surface hardness and wear resistance; backup rolls prioritize core strength and fatigue life.
Which inspection reports come with a forged roll?: Standard package: chemical analysis, heat-treatment record, hardness map along the barrel, full-volume ultrasonic report, magnetic particle report on journals and barrel, and a dimensional report against the drawing — bundled in an EN 10204 3.1 certificate.
What HS code applies to mill rolls?: Rolls for metal-rolling mills are classified under HS 8455.30. Other mill spares (chocks, shafts, guides) generally fall under HS 8455.90.