---
title: "Plate Rolling Hardox"
description: "Plate rolling & roll bending up to 120 mm thickness and Ø 8,000 mm – cylinders, cones, special shapes in steel, Hardox, stainless. Contract manufacturing."
url: "https://bock-gmbh.com/en/services/plate-rolling/"
language: "en"
index: "https://bock-gmbh.com/en/llms.txt"
---

# Plate Rolling Hardox – Contract Manufacturing in Germany

plate rolling Hardox contract manufacturing. Bock Maschinenbau offers plate rolling and profile rolling up to 120 mm plate thickness and Ø 8,000 mm. Steel, Hardox, stainless steel and fine-grain structural steels are formed into cylinders, cones and special shapes to drawing. Contract manufacturing in Lorch, Germany.
Rolling of cylinders, pipes, rings and shells depending on machine, material and component geometry.
Material thicknesses from thinner plates to heavy plate; maximum values depend on the material.
Rolling lengths up to 3,150 mm for large-format plate blanks and heavy formed parts.
Four 3-roll bending machines covering different diameter, thickness and length ranges.
Welding, CNC machining, shot blasting and painting can follow without an external interface.
Diameter, roundness, seam positions and documentation are agreed and inspected per project.

## Plate Rolling – Process and Capacity

Plate rolling at Bock is performed using heavy 3-roll bending machines. Plate thicknesses up to 120 mm for S235 can be rolled. For higher-strength steels such as Hardox and fine-grain structural steel, the maximum plate thickness reduces according to material yield strength.
Diameters up to Ø 8,000 mm are achievable. Cylinders, half-shells, cones and special shapes to drawing are the standard service. The in-house material store and 2×25 t crane system enable safe handling of heavy blanks.
Rolled components proceed directly to the welding fabrication line – everything from a single source in Lorch.
The rolling result is verified to drawing: diameter, roundness and seam positions are checked with calibrated measuring equipment. For high-precision cylinders and special shapes, dimensional reports are prepared and included in the scope of delivery.
Rolled parts in Hardox and fine-grain structural steel require adapted bending parameters, as these materials show a higher degree of springback. Thanks to many years of experience with these materials, Bock reliably achieves tight bending radii and close tolerances even in special steels.
After rolling, components can be welded, machined, shot-blasted and painted directly – all in the same facility in Lorch. Contract manufacturing is carried out to DIN EN ISO 9001:2015 with complete material traceability and documented quality assurance.
CNC Machinery

## Machines and Dimensions for Plate Rolling

Inner diameter, plate thickness and roll length determine the feasibility check. Several 3-roll bending machines are available at the Lorch site:
| Machine | Inner diameter Ø | Plate thickness | Roll length | Top roll Ø |
| Sertom · Plate rolling machine | Ø 400–8,000 mm | 8–120 mm | up to 3,050 mm | Ø 300 / 450 / 650 mm |
| SMT-Pullmax Kumla · Plate rolling machine | Ø 400–6,000 mm | 4–60 mm | up to 2,000 mm | Ø 375 mm |
| Davi 2048S · Plate rolling machine | Ø 340–6,000 mm | 8–80 mm | up to 2,000 mm | Ø 305 / 460 mm |
| Wilhelmsburger DWV · Plate rolling machine | Ø 300–5,000 mm | 4–30 mm | up to 3,150 mm | Ø 275 / 345 mm |
Several machines have interchangeable top rolls and therefore cover several working ranges – the row then lists every available diameter, smallest first. The values depend on the machine and material. For Hardox, stainless steel or fine-grain structural steel we assess springback, radius, roundness and tolerance per project based on your drawing.

## Whatever you bring — one roll fits

The four machines above deliberately have different optimal working ranges. Together they cover Ø 300 to 8,000 mm and 4 to 120 mm plate thickness — from the thin-walled small cylinder to the XXL shell, in steel, fine-grain structural steel, stainless steel and Hardox. That way no component falls between the machines — here is the right roll for each task.
Small & thick-walled
Tight radius at high wall thickness — the demanding combination.
e.g. compact, thick-walled pipe bodies, rings and bushings
Large & heavy (XXL)
Largest diameter meets the thickest heavy plate.
e.g. silo shells, vessel courses and hoppers up to Ø 8,000 mm
Thin-walled & long
Fine plates over the full pass length, at the smallest diameter.
e.g. long, thin-walled cylinders and small rings
Large & medium-heavy
Large diameter at medium wall thickness — the flexible all-rounder.
e.g. vessel shells and courses in the medium thickness range
- Cylinders & courses
- Cones & truncated cones
- Rings & flanges
- Half-shells
- Pipe bends & elbows
- Special shapes to drawing

## The 3-Roll Principle and Springback – Expertise in Plate Rolling

Plate rolling (bending) is a cold-forming process: the plate runs between three rolls and is progressively shaped to the desired curvature by their infeed. A few process details are decisive for a dimensionally accurate, round result:
- Pre-bending the edge (pre-rolling zone) – without pre-bending, a straight residual edge would remain at the start and end of the plate. We pre-roll the ends so that cylinders and courses close dimensionally accurate all around.
- Springback of higher-strength steels – fine-grain structural steel and Hardox spring back more after rolling. The rolls are fed in correspondingly tighter (over-bent) to reliably hit the target diameter.
- Cold forming without heat input – rolling is done cold, without a heat-affected zone and without microstructural distortion. The achievable bending radii depend on plate thickness, strength and rolling direction (framework: DIN 6935, cold bending of flat steel products).
- Cone and taper rolling – with obliquely fed rolls, truncated cones and conical courses are produced, not just cylindrical shapes.
- Minimum diameter per machine – the smallest achievable diameter is determined by the roll diameter; depending on the machine, we roll from Ø 300 mm.
We coordinate infeed, pre-bending and springback compensation per project based on your drawing – material, diameter, wall thickness and tolerance determine the parameters. For high-precision cylinders and special shapes, roundness and diameter are checked with calibrated measuring equipment and documented.
Materials for Forming

## Materials for Plate Rolling

The following materials are processed in plate rolling:
- Structural steel S235, S355 – up to 120 mm plate thickness
- Fine-grain structural steel S460–S1100 – high-strength rings and shells
- Hardox 400 / 500 – wear liner plates and hoppers
- Stainless steel 1.4301, 1.4571 – vessel and pipeline components
- Special steels to drawing and customer specification
Material certificates are provided on request or in line with the project requirement.
Welded Assemblies

## Typical Applications

Plate rolling and profile rolling are used for:
- Cylinders and half-shells for pressure vessels and tanks
- Conical sections and transition pieces for silos and hoppers
- Pipe bends and transition sections for pipework systems
- Hardox wear liners for mineral processing equipment
- Rings and flanges as pre-fabrication stage for welded structures
Rolled components are welded, machined and surface-treated directly on site. Rolling is followed immediately by welding, shot blasting and painting – without external logistics. The 2×25 t crane system enables safe handling of heavy plates and large-format cylinders across all manufacturing areas. For pressure vessels, silo construction and wear protection systems, components are manufactured to drawing. Plate thicknesses up to 120 mm and diameters up to 8,000 mm are possible, even for high-strength materials such as Hardox and fine-grain structural steel. Quality documentation and material certificates to DIN EN ISO 9001:2015 are available for all order types. Contract manufacturing without minimum quantities for individual parts and small batches. Customer-supplied plates are processed on request. Short transition to welding and surface treatment in the same facility.
Steel Construction & Contract Manufacturing

## Impressions from Our Plate Rolling

Real shots from our production in Lorch: the thick-walled shell on the rolls, cylinders, cones and rings in stainless and structural steel – and a 22 m pipe standing ready for shipment on the trailer.
More from our production: Forming · 20 images

## Direct Transition to Welding, Machining and Surface Finishing

Rolled components can be carried forward in the same facility. This reduces interfaces and makes procurement more plannable for buyers:
- MAG, TIG and submerged-arc welding for cylinders, pipes, rings and steel assemblies
- CNC large-part machining up to 50 t for mating faces, hole patterns and connection geometries
- Shot blasting and industrial painting as integrated surface treatment
- Assembly, intermediate inspection and logistics of heavy components via 2×25 t crane system
Depending on the project, individual parts, small batches and customer-supplied plates are processed. Material certificates, inspection reports and quality documentation are agreed per project.

## Plate Rolling at Bock – Your Advantages

Bock Maschinenbau offers plate rolling as an integrated step of contract manufacturing:
- Plate thickness up to 120 mm
- Heavy rolling machines for large-format steel plates.
- Diameter up to Ø 8,000 mm
- Very large cylinders and special shapes are achievable.
- Hardox and special steels
- Wear-resistant steels are processed to customer specification.
- No minimum order quantity
- Individual parts, prototypes and series production all manufactured.
- DIN EN ISO 9001:2015
- Quality management system with documented material traceability.
Vessel, apparatus and pipe builders from the Stuttgart area and the entire DACH region have us roll shells, cones and cylinders up to Ø 8,000 mm here in Lorch – including in stainless steel and Hardox.
Contact

## Frequently Asked Questions about Plate Bending and Plate Rolling

### Up to what diameter and plate thickness can you roll?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-welchem-durchmesser-blechstaerke-walzen

We roll diameters up to Ø 8,000 mm and plate thicknesses up to 120 mm (S235). For higher-strength steels such as Hardox and fine-grain structural steel, the maximum thickness reduces according to the strength. Four 3-roll plate bending machines cover the range from Ø 300 mm.
Machinery

### How small can the diameter be?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-klein-durchmesser-sein

Depending on the machine, we roll from Ø 300 mm. The smallest achievable diameter is determined by the roll diameter – for compact, thick-walled parts we use the machine designed for this.

### Can you also roll cones and conical shapes?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-kegel-konusformen-walzen

Yes. With obliquely fed rolls we produce truncated cones and conical courses – not just cylindrical shapes. We likewise roll rings, half-shells and pipe bends to drawing.

### How do you handle the springback of high-strength steels?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-gehen-rueckfederung-hochfester-staehle

Fine-grain structural steel and Hardox spring back more after rolling. We compensate for this with adapted infeed (over-bending) and check radius, roundness and tolerance per project – so tight tolerances are reliably maintained even with special steels.

### Does a straight edge remain at the plate ends?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-bleibt-blechenden-gerade-kante

Without pre-bending, a straight remnant would remain at the start and end. We pre-roll the edges so that cylinders and courses close dimensionally accurate all around and can be cleanly welded.

### Do you supply material certificates?

URL: https://bock-gmbh.com/en/services/plate-rolling/#faq-liefern-werkstoffzeugnisse

Yes. On request or in line with the project requirement, we provide material certificates to EN 10204. Manufacturing is carried out to DIN EN ISO 9001:2015 with complete material traceability.

## Press Brake Operator / Plate Roller – Sheet Metal Forming (m/f/d)

Press Brake Operator / Plate Roller – Sheet Metal Forming (m/f/d) — As a Press Brake Operator / Plate Roller (m/f/d), you will form heavy plate with us: you bend on press brakes up to 1,000 t and roll plates up to 120 mm thick into cylinders, cones and shells up to Ø 8,000 mm – and make the part ready for welding yourself, from flame-cutting the flat ends to tack welding. Experience on a press brake or plate roll is welcome, but it is not a requirement: career changers from metalworking are welcome too – we will train you on the machine. In 73547 Lorch, Ostalbkreis, near Schwäbisch Gmünd.

## Request Plate Rolling

Send us your drawing, material, diameter, wall thickness and quantity. We will assess feasibility and provide a project-specific quotation.

### Alexander Schulz

For new enquiries, quotations and technical questions on the feasibility of your project.

### Jochen Hack