Adamite Rolls (Alloy Steel Base Rolls)
Vimco Rolls Pvt Ltd · Rolling mill rolls since 1972 · Dera Bassi, Punjab · ISO 9001:2015
Hyper-eutectoid alloy steel rolls for the roughing stands of TMT bar, wire rod and hot strip mills, and for every stand of section and structural mills.
- Grades AD-42, AD-47, AD-52
- Hardness 40-55 Shore C
- Carbon 1.0-2.0% + Ni, Cr, Mo
- Profile near-uniform hardness to the core
What are adamite rolls?
Adamite rolls, also known as alloy steel base rolls, are hyper-eutectoid steel rolls with 1.0% to 2.0% carbon, alloyed with nickel, chromium and molybdenum. Vimco Rolls is an adamite rolls manufacturer and supplier making adamite rolls for steel rolling mills, also called adamite steel rolls. The alloying adds toughness and resistance to thermal fatigue. It is part of the range we make as a rolling mill rolls manufacturer since 1972.
The rolls go through a multi-stage heat treatment: annealing first, then carefully controlled tempering cycles. The result is a fine pearlitic matrix with spheroidised carbides, giving wear resistance, fire crack resistance and constant hardness across the working layer.
Their key advantage is near-uniform hardness from surface to core, so the working layer keeps its hardness as the roll wears and is redressed.
Adamite rolls at a glance
| Product | Adamite (alloy steel base) rolls |
|---|---|
| Grades | AD-42, AD-47, AD-52 |
| Hardness | 40-45, 45-50 and 50-55 Shore C |
| Material | Hyper-eutectoid steel, 1.0-2.0% C, alloyed with Ni, Cr, Mo |
| Heat treatment | Annealing followed by controlled tempering cycles |
| Microstructure | Fine pearlitic matrix with spheroidised carbides |
| Mill stands | Roughing stands of TMT bar, wire rod and hot strip mills; all stands of section and structural mills; rail, universal beam and billet mills |
Where adamite rolls sit in a TMT bar or wire rod mill
In TMT bar and wire rod mills, adamite rolls work at the start of the line, in the roughing stands. In section and structural mills they are used in every stage.
Intermediate
Finishing
Finishing block
Adamite roll applications
- Roughing stands of TMT bar, wire rod and hot strip mills
- Roughing, intermediate and finishing stands of section and structural mills
- Rail mills, universal beam mills and billet mills
Why mills use adamite rolls in roughing stands
Near-uniform hardness
Hardness stays almost constant from surface to core, across the whole working layer.
Fire crack resistance
Nickel, chromium and molybdenum plus controlled tempering give resistance to thermal fatigue and fire cracking.
Wear resistance with toughness
Spheroidised carbides in a fine pearlitic matrix resist wear, and the Ni, Cr, Mo alloying adds toughness.
Hardness from surface to core
Our hardness chart shows the two ends of the range falling from about 53 to 49 Shore C and from about 41 to 38 Shore C over the first 90 mm from the surface: a drop of only 3 to 4 Shore C. The micrograph (100x) shows the fine structure.
Adamite rolls chemical composition and grades
Three grades. From AD-42 to AD-52, hardness rises with carbon, chromium and nickel.
| Grade | Hardness (Shore C) | C | Mn | Si | S | P | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|---|
| AD-42 | 40-45 | 1.4-1.6 | 0.5-0.8 | 0.4-0.7 | 0.05 max | 0.05 max | 0.8-1.2 | 0.4-0.8 | 0.2-0.4 |
| AD-47 | 45-50 | 1.6-1.9 | 0.6-1.0 | 0.4-0.7 | 0.05 max | 0.05 max | 1.0-1.5 | 0.8-1.2 | 0.2-0.5 |
| AD-52 | 50-55 | 1.6-2.1 | 0.7-1.0 | 0.3-0.7 | 0.05 max | 0.05 max | 1.1-1.6 | 1.0-1.5 | 0.2-0.5 |
Scroll the table sideways on a phone. Need another hardness band? Ask our team.
Adamite vs alloy cast steel rolls
Both are steel rolls for roughing duty. The difference is carbon, hardness and the mill they suit.
| Adamite rolls | Alloy cast steel rolls | |
|---|---|---|
| Steel type | Hyper-eutectoid | Hypo-eutectoid |
| Carbon | 1.0-2.0% | 0.5-0.8% |
| Alloying | Ni, Cr, Mo | Cr, Mo |
| Hardness | 40-55 Shore C | 30-40 Shore C |
| Heat treatment | Annealing + controlled tempering | Double annealing |
| Main use | Roughing stands of TMT bar, wire rod and hot strip mills; section and structural mills | Roughing stands of medium and heavy section mills |
Our plant and quality lab
Vimco Rolls has made rolls since 1972. Our adamite rolls are made at our own plant in Dera Bassi, near Chandigarh, which has its own melting shop, heat treatment and machine shop.
- Digital medium frequency induction furnace with ladle refining through argon purging
- Gas-fired annealing furnace for heat treatment
- CNC lathes and roll grinding machines
- All processes consistent with ISO 9001:2015
In-house testing lab
| Internal soundness | Ultrasonic testing machine |
|---|---|
| Hardness | Portable and laboratory hardness testers |
| Microstructure | Metallurgical microscope |
| Chemistry | Optical emission spectrometer, XRF analyser, wet analysis lab |
Adamite rolls for rolling mills in India and overseas
Vimco Rolls supplies rolls to rolling mills across India and exports overseas, shipping to mills from Georgia to South Africa and from Nepal to Saudi Arabia. Send your mill details, roll drawing and destination country with your enquiry, and we will quote for delivery to your mill.
Our clients
Vimco Rolls has supplied rolls to rolling mills since 1972. These are some of the steel makers we serve, mostly TMT bar and wire rod re-rolling mills.
Industries
Steel re-rolling: TMT bars, wire rods, sections, strip and plate.
Recent dispatch: SGI and adamite rolls to customers.
Adamite rolls vs SGI pearlitic rolls
Every roll grade has its own place in the mill, so we compare adamite rolls only with the rolls that run the same stands.
Both are options for the roughing stands of a TMT bar or wire rod mill.
| Property | Adamite rolls (this page) | SGI pearlitic rolls |
|---|---|---|
| Material | Hyper-eutectoid alloy steel, 1.0-2.0% C | Spheroidal graphite (SG) iron |
| Microstructure | Fine pearlitic matrix with spheroidized carbides | Nodular graphite and carbides in a pearlitic matrix |
| Grades | AD-42, AD-47, AD-52 | SGP-52, SGP-57, SGP-62 |
| Hardness / strength | 40-55 Shore C | 50-65 Shore C |
| Main alloying elements | Ni, Cr, Mo | Ni 1.4-2.0%, Cr 0.4-0.7%, Mo 0.2-0.5% |
| Main stands | Roughing stands of TMT bar, wire rod and hot strip mills; all stands of section and structural mills; rail, universal beam and billet mills | Roughing and intermediate stands of TMT bar and wire rod mills; intermediate and finishing stands of structural and strip mills |
| Note | Annealed, then tempered under control | – |
Which one suits your mill depends on the stand and the steel you roll. Send us the stand and grade and we will recommend one.
Adamite rolls: frequently asked questions
What are adamite rolls?
Adamite rolls, also called alloy steel base rolls, are hyper-eutectoid steel rolls with 1.0% to 2.0% carbon, alloyed with nickel, chromium and molybdenum. After annealing and controlled tempering they have a fine pearlitic matrix with spheroidised carbides, which gives wear resistance, fire crack resistance and near-uniform hardness from surface to core.
What does hyper-eutectoid mean in an adamite roll?
It means the steel carries more carbon than eutectoid steel. In adamite rolls the carbon is 1.0% to 2.0%, and the extra carbon forms the carbides that give the roll its wear resistance.
Which mill stands use adamite rolls?
Roughing stands of TMT bar, wire rod and hot strip mills; roughing, intermediate and finishing stands of section and structural mills; and rail mills, universal beam mills and billet mills.
What grades and hardness do Vimco adamite rolls come in?
Three grades: AD-42 at 40-45 Shore C, AD-47 at 45-50 Shore C and AD-52 at 50-55 Shore C.
What is the chemical composition of an adamite roll?
Across our three grades: C 1.4-2.1%, Mn 0.5-1.0%, Si 0.3-0.7%, Cr 0.8-1.6%, Ni 0.4-1.5%, Mo 0.2-0.5%, with S and P at 0.05% max. Carbon, chromium and nickel rise from AD-42 to AD-52. The grade-by-grade table is on this page.
Does the hardness of an adamite roll drop as it wears?
Very little. One of the key advantages of adamite rolls is uniform hardness from surface to core. Our hardness chart shows a fall of only about 3 to 4 Shore C over the first 90 mm from the surface.
What is the difference between adamite and alloy cast steel rolls?
Adamite rolls are hyper-eutectoid, with 1.0-2.0% carbon plus Ni, Cr and Mo, at 40-55 Shore C, used mainly in roughing stands of TMT bar, wire rod and strip mills. Alloy cast steel rolls are hypo-eutectoid, with 0.5-0.8% carbon plus Cr and Mo, at 30-40 Shore C, double annealed for toughness, and used in roughing stands of medium and heavy section mills.
How are adamite rolls heat treated?
Through a multi-stage heat treatment that starts with annealing and is followed by carefully controlled tempering cycles. This gives wear resistance, fire crack resistance and constant hardness across the working layer.
Who manufactures adamite rolls in India?
Vimco Rolls Pvt Ltd manufactures adamite rolls in grades AD-42, AD-47 and AD-52 at its plant in Dera Bassi, Punjab. We have made rolling mill rolls since 1972, with processes consistent with ISO 9001:2015.
Do you export Adamite rolls?
Yes. Vimco Rolls supplies rolls to rolling mills across India and exports overseas, shipping to mills from Georgia to South Africa and from Nepal to Saudi Arabia. Share your destination country with your enquiry.
Which rolling mills does Vimco supply adamite rolls to?
We supply adamite rolls to the roughing stands of TMT bar, wire rod and hot strip mills, to all stands of section and structural mills, and to rail, universal beam and billet mills. Recent dispatch: SGI and adamite rolls to customers. You can see the mills we serve on our clients page.
Visit or contact our Dera Bassi plant
Haripur Hinduan Road, Village Sundran,
Dera Bassi, Punjab 140507, India
Phone: +91 9815627202, +91 9988222086
Email: info@vimcorolls.com, vimcorolls@gmail.com
Our plant is in Dera Bassi, near Chandigarh, Punjab.
Get a quote for Adamite Rolls
For a fast and accurate quote, include:
- Mill type (TMT bar, wire rod, strip, section, rail)
- Stand position
- Roll dimensions or drawing
- Grade (AD-42, AD-47, AD-52), if known
- Quantity