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Industrial Standard Raised Expanded Metal for Walkways, Guarding, and Enclosures

Industrial-grade raised expanded metal manufactured by slitting and stretching solid metal sheet or plate in a single cold-forming process. Features a raised 3D diamond pattern with angled strands that provide anti-slip traction, high strength-to-weight ratios, and open area for air, light, and drainage.

Carbon Steel Standard Expanded Metal
Materials：Carbon Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Galvanized Steel Standard Expanded Metal
Materials：Galvanized Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Stainless Steel Standard Expanded Metal
Materials：Stainless Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Aluminum Standard Expanded Metal
Materials：Aluminum
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a maximum...
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Technical Specifications

Parameter	Metric Range	Imperial Range	Manufacturing Tolerance
Plate or Sheet Thickness	0.5 mm to 8.0 mm	0.020 inches to 0.315 inches	+/- 0.10 mm (+/- 0.004 inches)
Strand Width	0.8 mm to 10.0 mm	0.031 inches to 0.394 inches	+/- 0.15 mm (+/- 0.006 inches)
SWD (Short Way of Diamond)	3.0 mm to 100.0 mm	0.118 inches to 3.937 inches	Pitch accuracy +/- 0.5 mm
LWD (Long Way of Diamond)	6.0 mm to 200.0 mm	0.236 inches to 7.874 inches	Pitch accuracy +/- 1.0 mm
Open Area Ratio	30 percent to 85 percent	30 percent to 85 percent	Calculated per tool die
Standard Sheet Sizes	1220 x 2440 mm, 1500 x 3000 mm	4 x 8 feet, 5 x 10 feet	Squareness +/- 3.0 mm
Supply Formats	Flat Cut Sheets, Standard Mill Sheets, Coils (light gauge up to 1500 mm width)

Material Options

Carbon Steel (Q195, Q235, A36, S235JR): High mechanical strength for structural fabrication and general industrial screening.

Stainless Steel (304, 304L, 316, 316L): Superior corrosion resistance for chemical processing plants, marine environments, and food contact equipment.

Aluminum (1050, 3003, 5052, 6061): Lightweight, non-magnetic material for architectural cladding, decorative panels, and transit equipment.

Galvanized Steel (Pre-galvanized HDG sheet): Cost-effective corrosion protection for outdoor fencing and perimeter guards.

Surface Treatments and Finishes

01/

Hot-Dip Galvanizing (ASTM A123 / EN ISO 1461): Applied post-expansion to fully coat sheared strand edges with 60 to 85 microns of zinc protection.

02/

Powder Coating (Polyester / Epoxy): Architectural and industrial protective finish available in RAL color spectrums for UV resistance.

03/

Pickling and Passivation: Chemical cleaning for stainless steel grades to restore corrosion resistance after shearing or welding.

04/

Degreasing and Oiling: Solvent washing to remove stamping lubricants prior to customer welding or painting.

Primary Applications

Machine Guarding and Safety Barriers

Protective screens for rotating equipment, conveyor drives, high-voltage enclosures, and robot cells.

Walkways, Catwalks and Stair Treads

Anti-slip floor panels and drainage steps for chemical plants, refineries, and power stations.

Security and Perimeter Fencing

High-security anti-climb fencing for prisons, utility sub-stations, logistics hubs, and military installations.

Architectural Cladding and Sunshades

Exterior building facades, acoustic ceiling panels, parking garage screening, and balustrade infill panels.

Industrial Filtration and Support

Rigid support backings for heavy-duty air, oil, and liquid filter media.

Manufacturing Capabilities and Quality Control

Production is executed on heavy-duty automatic expansion presses ranging from 25 to 160 tons, capable of handling cold-rolled coils and hot-rolled carbon steel plates.

Tooling Precision

Multi-segmented alloy steel dies are dressed on precision tool grinders to eliminate burrs and minimize strand micro-cracking during cold forming.

Sheet Squareness and Flatness

Post-expansion hydraulic leveling equipment eliminates camber and coil set, ensuring diagonal tolerances within 3.0 mm on standard 4 x 8 feet sheets.

Process Inspection

Production lots undergo regular checks for strand width, SWD and LWD pitch consistency, sheet weight per square meter, and zinc coating thickness via magnetic gauge verification.

Certifications and Traceability

All shipments include EN 10204 3.1 Mill Test Certificates verifying raw material heat numbers, chemical composition, and mechanical properties.

Packaging

According to the chemical and physical properties of the products, we use waterproof, moisture-proof and breakage-proof materials for packaging to avoid product damage during transportation. In addition, we can also provide customized packaging according to customer's specific requirements to meet the special needs of different customers.

FAQ

Q: What is the key difference between Standard (Raised) and Flattened Expanded Metal?

A: Standard expanded metal retains the 3D angled strand orientation produced during expansion, offering higher structural rigidity and superior slip resistance. Flattened expanded metal undergoes a post-expansion cold-rolling pass that flattens the strands parallel to the sheet plane, reducing overall thickness and providing a smooth surface.

Q: How is SWD and LWD orientation measured on standard sheet panels?

A: SWD (Short Way of Diamond) and LWD (Long Way of Diamond) refer to the distance from a point on a diamond to the corresponding point on the adjacent diamond. When ordering sheets (such as 4 x 8 feet), specify whether the SWD or LWD runs parallel to the 4 feet width, as this determines load direction and visual appearance.

Q: Can expanded metal be sheared to custom dimensions without unraveling?

A: Yes. Unlike woven wire mesh, expanded metal is formed from a single solid sheet without welds or interweaving. When cut or sheared, the surrounding strands remain intact and will not unravel or lose structural tension.

Q: What surface finish is recommended for outdoor industrial installations?

A: Post-expansion hot-dip galvanizing per ASTM A123 / EN ISO 1461 is recommended. Applying hot-dip galvanizing after expanding ensures that all freshly sheared strand edges receive full zinc coverage, preventing edge corrosion in outdoor environments.

Q: What information is required to receive an accurate technical quotation?

A: Provide material grade, sheet thickness, strand width, SWD x LWD dimensions (or standard item number), sheet size (width x length and diamond orientation), surface finish requirements, and total panel quantity.

Q: Do you supply EN 10204 3.1 Material Test Certificates with orders?

A: Yes. Every production batch is delivered with complete mill test documentation detailing the raw material heat number, chemical analysis, mechanical yield and tensile strength, and post-treatment compliance reports (such as hot-dip galvanizing thickness).

Anping Yilida Metal Wire Mesh Co., Ltd. is one of the most reliable standard expanded metal manufacturers and suppliers in China, also supports customized service. Please feel free to buy bulk high quality standard expanded metal made in China here from our factory.

Aluminum Standard Expanded Metal, Stainless Steel Standard Expanded Metal, Galvanized Steel Standard Expanded Metal