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Help Center304 Stainless Steel Perforated Metal Sheet 0.8mm Thick 4mm Hole Size 40% Open Area Industrial Use
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As a leading manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory is proud to present our 304 Stainless Steel Perforated Metal Sheet – a versatile, high-strength solution engineered for demanding industrial environments. With a thickness of 0.8mm, a precise 4mm hole size, and a 40% open area, this perforated sheet offers an optimal balance of structural integrity and airflow. Manufactured from premium-grade 304 stainless steel, it provides excellent corrosion resistance, durability, and longevity, making it ideal for a wide range of applications including filtration, noise control, machine guarding, and architectural design.
Our factory, located in Hengshui, Hebei, China, has over 25 years of experience in wire mesh and perforated metal production. We export to markets across North America, South America, Europe, Asia, Africa, and Oceania, with annual export values between US$5 million and US$10 million. Every sheet is produced with strict quality control, ensuring consistent hole geometry, flatness, and edge finishing. Whether you need standard sizes or custom dimensions, we are your reliable partner for industrial perforated metal.
Key Features & Technical Specifications
- Material: 304 Stainless Steel (AISI 304, 1.4301) – excellent resistance to oxidation, rust, and chemicals.
- Thickness: 0.8mm (±0.05mm tolerance) – thin yet strong for lightweight applications.
- Hole Size: 4mm diameter round holes, precisely punched for consistent flow.
- Open Area: 40% – ideal for high air/fluid passage while maintaining material strength.
- Hole Pattern: Standard staggered (60° centers) for maximum strength; straight pattern available upon request.
- Sheet Dimensions: Customizable – typical sizes: 1000x2000mm, 1220x2440mm, 1250x2500mm, or as per your specifications.
- Surface Finish: Mill finish (standard); optional brushed, mirror polished, or powder coated in various colors.
- Edge Preparation: Deburred edges for safe handling – optional rounding or beveling available.
- Packing: Wooden pallets with waterproof paper wrapping to prevent damage during transit.
Technical Data Table
| Parameter | Value |
|---|---|
| Material Grade | 304 Stainless Steel (UNS S30400) |
| Sheet Thickness | 0.8 mm (0.0315 inch) |
| Hole Diameter | 4 mm (0.157 inch) |
| Open Area Ratio | 40% (±2%) |
| Hole Pitch (Center-to-Center) | Approx. 6.5 mm (staggered pattern) |
| Tensile Strength | ≥515 MPa (75 ksi) |
| Yield Strength | ≥205 MPa (30 ksi) |
| Elongation | ≥40% (in 50mm) |
| Hardness (Rockwell B) | ≤95 HRB |
| Corrosion Resistance | Excellent in mild atmospheres, food, and chemical environments |
| Operating Temperature | -196°C to 800°C (intermittent use) |
Benefits for Your Application
- Enhanced Durability: 304 stainless steel resists rust, pitting, and stress corrosion cracking, ensuring long service life even in humid or outdoor conditions.
- Optimized Flow: The 40% open area and 4mm holes provide excellent throughput for air, liquids, and light solids, reducing pressure drop in filtration systems.
- Weight Reduction: At 0.8mm thickness, the sheet is lightweight yet strong enough for structural panels, saving material costs and installation effort.
- Versatility: Suitable for industrial screens, ventilation grilles, protective guards, speaker grilles, decorative cladding, and more.
- Customizable: We offer cutting to size, additional hole patterns, edge finishing, and surface treatments to meet your specific requirements.
- Hygienic Properties: Non-porous surface makes it easy to clean and ideal for food processing, pharmaceutical, and sanitary applications.
Trust & Reliability – Why Choose Us
With over 25 years of manufacturing expertise, Anping County Boli Hardware Wiremesh Products Factory has built a reputation for quality and consistency. Our annual export value of US$5 million to US$10 million reflects the trust of customers in more than 20 countries across North America, Europe, Asia, Africa, and Oceania. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring efficient logistics worldwide.
Every production batch undergoes rigorous inspection for hole accuracy, flatness, and material composition. We use advanced CNC punching machines to guarantee precise tolerances. Our experienced team works closely with clients to provide technical support, sample approval, and custom fabrication. Whether you need a small quantity for prototyping or bulk orders for large projects, we are committed to delivering on time and within budget.
Contact us today for a quote or sample request. Let our 304 stainless steel perforated sheets become the backbone of your next industrial project.
Frequently Asked Questions (FAQ)
1. What is the exact hole arrangement for this 4mm perforated sheet?
The standard arrangement is a staggered 60° pattern (equilateral triangle). This maximizes strength and provides uniform open area. Straight row patterns are available upon request.
2. Can you supply sheets with different open area percentages?
Yes, we can adjust hole size, pitch, or pattern to achieve open areas from 10% to 70% while maintaining material integrity. Please specify your requirements.
3. What is the maximum sheet size you can produce?
Our standard maximum sheet size is 2000x4000mm, but we can also cut to your exact dimensions. For smaller parts, we offer flat blanks or blanks with notches.
4. Is this material suitable for outdoor use?
Absolutely. 304 stainless steel has excellent corrosion resistance in most atmospheric conditions. For coastal or highly corrosive environments, we recommend 316L grade as an option.
5. Do you offer surface treatments like powder coating or brushing?
Yes, we provide optional finishes: mill finish (standard), brushed, mirror polished, powder coated (any RAL color), or PVC coated. Please inquire for details and lead times.
6. Can I get a sample before placing a bulk order?
Certainly. We offer free samples for existing stock sizes (subject to shipping cost). Custom sample production is available with a small tooling fee, which is refundable on bulk orders.
7. What is the typical lead time for production?
For standard sizes and quantities, lead time is 7–15 working days. Custom orders may require 15–25 working days depending on complexity. We also offer express delivery for urgent orders.
8. How do you ensure the sheets are flat and free from burrs?
We use hydraulic punching machines with precise dies, followed by deburring rollers. Every sheet is inspected on a flatness table. Additional flattening service is available if needed.
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