1.Material Properties
| Material | Yield Strength | Tensile Strength | Elongation |
| HSLA 65 Grade Steel | 65,000 psi / 275 MPa | 95,000 psi / 655 MPa | 25% |
2. Product Specifications
| Thickness | Grade | Hole Diameter | Minor Deflection Load @ 0.250″ |
| 0.16″ | 2 | 1/2″ – 2″ | 20,000 lbs |
| 1/4″ | 3 | 1/2″ – 2″ | 30,000 lbs |
| 1/4″ | 4 | 1/2″ – 2″ | 40,000 lbs |
| 5/16″ | 5 | 1/2″ – 2″ | 50,000 lbs |
| 3/8″ | 6 | 1/2″ – 2″ | 50,000 lbs |
| 1/2″ | 7 | 1/2″ – 2″ | 70,000 lbs |
3. Applications
This heavy-duty mining plate washer is commonly used for:
• Underground mine roof support.
• Roof bolt reinforcement systems.
• Coal mining and hard rock mining applications.
• Quarry and stone extraction sites.
• Tunnel construction.
• Ground stabilization.
• Storage and transport support.
4. Why Should You Buy This Mining Domed Plate Washer?
Roof support systems are designed to hold up against extreme weight, vibrations, and tough conditions. Our HSLA steel mining domed plate washer helps ensure strong load-bearing capabilities and even support when used with compatible roof bolts. The steel helps increase strength and durability. The domed shape of this plate washer helps evenly distribute weight.
5. FAQ
5.1 What is a mining plate washer used for?
Plate washers are used with roof bolts to support the roof of a mine, reinforce rocks, and help distribute weight applied to the surface in underground tunneling projects.
5.2 What grade of steel is this made of?
This plate washer is made of HSLA 65 steel. HSLA steel offers high strength, durability and impact resistance.
5.3 What size holes can be ordered?
We offer hole diameter sizes ranging from 1/2″ all the way up to 2″
5.4 Can this be used for underground mining applications?
Yes. This steel plate washer is great for underground mine roof support. It can also be used for coal mining, hard rock mining and tunnel reinforcement.
5.5 What standards are used for?
Our product grades follow ASTM F432-13 standard sizes.
5.6 Can I get a custom plate?
We offer customization on hole size, thickness, and surface treatment. Contact us for details.
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We deliver complete support for underground reinforcement applications, covering: Mining roof and sidewall support systems Tunnel reinforcement solutions Slope stabilization engineering support Foundation anchoring systems Underground safety structural systems From early-stage project planning to on-site application, we help customers build safer and more stable underground environments.
Wanfeng provides a fully integrated product supply system, enabling customers to source all ground support materials from one supplier: Rock bolt systems (resin / FRP / threaded) Cable bolts & anchoring systems Steel arches & I-steel support systems Wire mesh & reinforcement mesh Plates, nuts, bolts & fastening components Resin & cement anchoring materials Mining tools & consumable accessories Our one-stop supply capability reduces procurement complexity and improves project efficiency.
We ensure stable and reliable product performance through strict manufacturing and quality control systems: Standardized production processes Raw material inspection and control Mechanical performance testing Load-bearing and tensile strength verification Batch consistency inspection Final quality inspection before shipment Every product is engineered to meet demanding underground safety requirements.
We also support customized solutions for different mining and engineering projects: Customized rock bolt specifications Non-standard steel support design Special mesh and reinforcement structures Project-based product configuration OEM / private label cooperation We work closely with global partners to develop tailored solutions for complex underground environments.
With strong export experience, we provide efficient global delivery and supply chain support: International export packaging standards Container loading optimization Multi-region shipping support Fast production scheduling for urgent projects Stable long-term supply agreements We ensure reliable delivery to mining projects across different countries and regions.
We support customers throughout the entire project lifecycle: Technical documentation support Installation guidance assistance Product replacement support Long-term supply continuity Engineering consultation for project expansion Our goal is to build long-term partnerships, not just single transactions.
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