Heavy Stainless Steel Plate Surface Finishing Solutions

Heavy-Duty NO.4 and Hairline Grinding for 5–100 mm Hot-Rolled Stainless Steel Plates

Hot-rolled stainless steel plates are widely used in pressure vessels, chemical processing equipment, energy systems, food-processing machinery, pharmaceutical tanks, shipbuilding, architectural structures, and heavy industrial equipment.

Unlike thin decorative sheets, heavy stainless steel plates require significantly higher machine rigidity, conveying capacity, grinding power, and process stability. Plate thickness, weight, surface scale, waviness, and uneven original conditions can make conventional polishing equipment unsuitable for continuous production.

Lebon provides the Heavy-Duty NO.4 & Hairline Grinding Line for hot-rolled stainless steel plates with thicknesses ranging from 5 mm to 100 mm. The production line is designed to remove surface defects, improve surface grade, and produce uniform NO.4 or Hairline finishes under demanding heavy-plate processing conditions.

Typical Customers and Projects

Lebon’s heavy-plate grinding solutions serve customers in China and international markets, including:

• Stainless steel plate manufacturers

• Steel service centers

• Pressure-vessel manufacturers

• Chemical equipment producers

• Tank and container manufacturers

• Energy-equipment companies

• Shipbuilding suppliers

• Heavy industrial fabricators

• Architectural metal processors

• Food and pharmaceutical equipment manufacturers

Each line can be customized according to plate thickness, width, length, weight, material grade, original surface condition, required finish, and production capacity.

Typical Workpieces

The Lebon Heavy-Duty NO.4 & HL Line is designed for:

• Hot-rolled stainless steel plates

• Heavy stainless steel sheets

• Pickled stainless steel plates

• Pressure-vessel plates

• Tank manufacturing plates

• Chemical equipment plates

• Reactor and heat-exchanger plates

• Shipbuilding stainless steel plates

• Heavy decorative metal panels

• Industrial structural plates

The system can process plates with different thicknesses and dimensions while maintaining stable grinding pressure and consistent conveying.

Typical Stainless Steel Materials

SUS304 Stainless Steel

SUS304 is one of the most commonly used austenitic stainless steels.

Its advantages include:

• Good corrosion resistance

• Excellent formability

• Reliable welding performance

• Stable grinding characteristics

• Wide industrial applicability

Typical applications include food equipment, storage tanks, architectural components, machinery, and general industrial structures.

SUS316L Stainless Steel

SUS316L contains molybdenum and offers improved resistance to corrosion, especially in chloride-containing and chemical environments.

It is widely used in:

• Chemical tanks

• Pharmaceutical equipment

• Marine environments

• Food-processing systems

• Pressure vessels

• Heat exchangers

Because SUS316L can generate considerable heat during grinding, stable pressure, suitable abrasives, and effective cooling are important for achieving a uniform finish.

2205 Duplex Stainless Steel

2205 duplex stainless steel combines austenitic and ferritic structures, providing high strength and excellent corrosion resistance.

Common applications include:

• Oil and gas equipment

• Chemical processing systems

• Marine engineering

• Pressure vessels

• Desalination equipment

• Heavy industrial structures

Its high strength and hardness require a powerful grinding system, rigid machine construction, and optimized abrasive parameters.

Challenges in Heavy Stainless Steel Plate Grinding

Processing stainless steel plates from 5 mm to 100 mm presents several challenges that do not normally occur with thin sheets.

High Plate Weight

Heavy plates place substantial loads on the conveyor, rollers, machine frame, and lifting system.

Insufficient load capacity may cause:

• Unstable material movement

• Roller deformation

• Feed-speed variation

• Uneven grinding

• Premature mechanical wear

Lebon uses reinforced conveying structures and heavy-load components to support stable plate transportation.

Uneven Original Surface

Hot-rolled plates may contain:

• Mill scale

• Pickling marks

• Rolling lines

• Oxidized areas

• Local scratches

• Surface waviness

• Uneven roughness

• Minor pits and defects

The grinding system must remove or reduce these defects without creating excessive local material loss.

High Grinding Resistance

Thick plates made from SUS304, SUS316L, or 2205 may require powerful grinding heads and high cutting capacity.

Insufficient grinding power can result in:

• Low defect-removal efficiency

• Unstable abrasive cutting

• Uneven surface texture

• Excessive production time

• Increased abrasive consumption

Vibration Control

Heavy plates can generate strong dynamic loads during feeding and grinding.

Machine vibration may leave:

• Chatter marks

• Periodic grinding lines

• Uneven texture

• Surface waves

• Inconsistent roughness

A high-rigidity machine frame and stable grinding-head structure are therefore essential.

Consistent Full-Width Grinding

Wide heavy plates require uniform grinding pressure across the entire plate width.

Uneven pressure can produce:

• Different surface shades

• Inconsistent roughness

• Visible overlapping lines

• Unbalanced material removal

• Edge-to-center differences

Core Processing Requirement

Stable Grinding for 5–100 mm Heavy Plates

The main requirement is the ability to process stainless steel plates with thicknesses from 5 mm to 100 mm safely and consistently.

This requires:

• High-load conveying rollers

• Reinforced machine structure

• Powerful grinding motors

• Stable plate positioning

• Precision pressure control

• Accurate height adjustment

• Reliable belt tracking

• Heavy-duty electrical and mechanical components

The Lebon line is engineered for continuous heavy-plate operation rather than being adapted from a standard thin-sheet polishing machine.

NO.4 Surface Finish

NO.4 is a widely used directional brushed finish produced with abrasive-belt grinding.

It provides:

• Uniform short linear grain

• Controlled surface roughness

• Reduced visibility of hot-rolled defects

• Clean industrial appearance

• Better preparation for fabrication

• Consistent batch quality

NO.4-finished heavy plates are commonly used for tanks, vessels, machinery, food equipment, and architectural components.

Hairline Surface Finish

Hairline finishing produces a finer, longer, and more continuous directional texture.

A high-quality Hairline surface should have:

• Straight grain direction

• Uniform line density

• Consistent visual appearance

• No vibration marks

• No overlapping patterns

• Stable roughness across the full plate

• Minimal variation between batches

Hairline finishing is suitable for visible industrial equipment, architectural panels, elevator structures, premium tanks, and decorative heavy-plate applications.

Lebon Heavy-Duty NO.4 & HL Line

The Lebon Heavy-Duty NO.4 & Hairline Line can be configured as a complete automated production system.

A typical line may include:

• Heavy-plate loading system

• Plate alignment and positioning

• Reinforced roller conveyor

• Surface defect-removal grinding

• Multi-head abrasive-belt grinding

• NO.4 finishing section

• Hairline finishing section

• Wet or dry processing configuration

• Cleaning system

• Drying system

• Surface inspection

• Protective-film application

• Heavy-plate unloading system

The final configuration is determined by the plate dimensions, maximum weight, initial surface condition, target finish, and production capacity.

Key Equipment Features

Reinforced Machine Structure

The main frame is designed with high rigidity to resist deformation and vibration during heavy-load operation.

A stable structure helps improve:

• Grinding accuracy

• Surface uniformity

• Equipment service life

• Long-term production stability

Heavy-Load Conveying System

The conveyor system uses reinforced rollers, shafts, bearings, and drive components to support thick and heavy stainless steel plates.

Stable conveying reduces speed variation and maintains consistent contact between the abrasive belt and workpiece.

High-Power Grinding Heads

Heavy-duty grinding motors provide sufficient cutting force for hot-rolled stainless steel and duplex stainless steel plates.

Multiple grinding heads can be arranged for:

1. Initial defect removal

2. Intermediate grinding

3. NO.4 finishing

4. Hairline finishing

Precision Height Adjustment

The machine can be adjusted according to different plate thicknesses.

Accurate height positioning helps maintain suitable grinding pressure when switching between 5 mm, 20 mm, 50 mm, and 100 mm plates.

Constant-Pressure Grinding

Stable grinding pressure prevents local over-grinding and helps maintain a uniform surface across the complete plate.

Depending on the project, the system can use pneumatic, hydraulic, or servo-controlled pressure regulation.

Automatic Abrasive-Belt Tracking

Automatic belt tracking keeps the abrasive belt correctly aligned during long production cycles.

This reduces:

• Belt deviation

• Edge damage

• Uneven grinding width

• Unexpected machine stoppages

Anti-Vibration Design

The heavy-duty frame, precision-balanced rollers, stable grinding heads, and optimized transmission system help reduce vibration marks and chatter patterns.

Intelligent PLC Control

Operators can control and store processing parameters such as:

• Plate thickness

• Feed speed

• Abrasive-belt speed

• Grinding pressure

• Grinding-head height

• Processing sequence

• Cleaning and drying settings

Recipe storage improves repeatability when processing different stainless steel grades and plate specifications.

Wet and Dry Grinding Options

Wet Grinding

Wet grinding is recommended when customers require:

• Better heat control

• Lower risk of grinding burns

• Efficient removal of grinding residue

• Improved abrasive-belt life

• Reduced airborne dust

• More stable fine finishing

The system can include coolant circulation, settling, filtration, and recycling.

Dry Grinding

Dry grinding may be selected for certain industrial applications where water treatment is not preferred.

A dry line normally requires:

• High-capacity dust extraction

• Effective spark and dust control

• Heat-resistant abrasives

• Suitable workshop safety measures

Lebon evaluates the material, finish, production environment, and local requirements before recommending wet or dry processing.

Typical Processing Sequence

A heavy stainless steel plate may pass through the following stages:

1. Plate loading

2. Surface inspection

3. Thickness and flatness confirmation

4. Plate alignment

5. Coarse defect-removal grinding

6. Intermediate grinding

7. NO.4 or Hairline finishing

8. Surface cleaning

9. Drying

10. Final quality inspection

11. Protective-film application

12. Plate unloading

The abrasive sequence depends on defect depth, original roughness, material grade, and final finish requirements.

Benefits for Heavy-Plate Manufacturers

The Lebon Heavy-Duty NO.4 & HL Line helps customers achieve:

• Stable processing of 5–100 mm plates

• Effective reduction of rolling and pickling marks

• Uniform NO.4 and Hairline textures

• High full-width surface consistency

• Reduced vibration marks

• Controlled material removal

• Stable grinding of SUS304, SUS316L, and 2205

• Higher production efficiency

• Reduced manual polishing

• Lower rework rates

• Improved product grade

• Reliable continuous production

Typical Application Industries

Finished heavy stainless steel plates are used in:

• Pharmaceutical tanks

• Food-processing vessels

• Chemical storage tanks

• Pressure vessels

• Reactors

• Heat exchangers

• Energy equipment

• Marine engineering

• Shipbuilding

• Agricultural tanks

• Architectural decoration

• Heavy industrial machinery

Quality Control

For heavy-plate surface finishing, inspection may include:

• Surface roughness

• Grain direction

• Texture uniformity

• Color consistency

• Plate flatness

• Vibration marks

• Grinding burns

• Local over-grinding

• Residual scratches

• Edge quality

• Batch consistency

Acceptance standards should be confirmed before the equipment configuration and abrasive process are finalized.

Why Choose Lebon?

Lebon specializes in metal surface grinding, polishing, and brushing production lines for stainless steel, aluminum, titanium, copper, and special alloys.

For heavy stainless steel plates, Lebon provides:

• Industry-leading 5–100 mm processing capability

• Heavy-duty NO.4 and Hairline production lines

• Reinforced machine frames

• High-load conveying systems

• Powerful multi-head grinding configurations

• Precision pressure and height control

• Wet and dry processing options

• Customized loading and unloading systems

• Sample grinding and process development

• Installation and commissioning

• Operator training

• International technical support

Rather than using a standard sheet-polishing machine, Lebon develops the line around the actual weight, thickness, width, material hardness, and surface condition of the customer’s heavy plates.

Frequently Asked Questions

What plate thickness can the line process?

Lebon’s heavy-duty line can be configured for stainless steel plates ranging from 5 mm to 100 mm, depending on the project requirements.

Can the same line process SUS304, SUS316L, and 2205?

Yes. One line can process these materials, but the abrasive grade, belt speed, grinding pressure, feed speed, and number of passes must be adjusted for each material.

Can hot-rolled defects be completely removed?

The achievable result depends on defect depth, plate flatness, and allowable material removal. Light and medium rolling or pickling marks can usually be significantly reduced or removed. Deep pits may require additional processing.

Can the machine produce both NO.4 and Hairline finishes?

Yes. The production line can integrate separate grinding and finishing sections for both NO.4 and Hairline surfaces.

How are 100 mm plates transported safely?

The line uses reinforced rollers, heavy-duty bearings, high-capacity drives, and customized loading and unloading systems based on the maximum plate weight.

Can automatic loading and unloading be included?

Yes. Lebon can provide roller tables, lifting platforms, vacuum loading systems, magnetic handling systems, or other customized automation depending on the plate material and weight.

Conclusion

Grinding hot-rolled stainless steel plates with thicknesses from 5 mm to 100 mm requires much more than a standard polishing machine. The equipment must combine high structural rigidity, powerful grinding performance, heavy-load conveying, accurate pressure control, and reliable anti-vibration technology.

Lebon’s Heavy-Duty NO.4 & Hairline Line is developed for stable processing of SUS304, SUS316L, 2205, and other heavy stainless steel plates. It helps manufacturers remove rolling marks, improve surface quality, produce uniform directional finishes, and achieve reliable large-batch production.

With heavy-duty engineering and customized process design, Lebon delivers an industry-leading surface finishing solution for thick stainless steel plates used in demanding industrial applications.

Contact Lebon

To receive a customized heavy-plate grinding solution, please provide:

• Stainless steel grade

• Minimum and maximum thickness

• Plate width and length

• Maximum plate weight

• Original surface condition

• Required NO.4 or Hairline finish

• Target surface roughness

• Wet or dry processing preference

• Required production capacity

• Loading and unloading requirements

Lebon will recommend the suitable machine structure, grinding-head configuration, abrasive process, conveying system, and automation level for your project.