Ductile Cast Iron Tree Grates (Tree Surround Grates)

I. Technical Features

1. Material & Manufacturing

Material Properties: Ductile iron (Mg/rare earth nodularization) ensures spherical graphite distribution, delivering high tensile strength (≥420 MPa) and elongation (≥10%), far surpassing gray iron.
Surface Treatment: Anti-rust galvanizing or epoxy coating enhances corrosion resistance for humid, saline, or harsh environments.

2. Structural Design

Modular Assembly: Circular, semicircular, or cross-shaped components adapt to tree pits of varying sizes (e.g., 1m×1m or irregular shapes), with pre-drilled holes for landscape lighting.
Water Management: ≥80% open area ratio stores rainwater for root absorption while directing runoff to reduce soil erosion.
Anti-Slip & Load-Bearing: Slip-resistant textures (friction coefficient ≥0.6) and load capacity ≥1 ton per unit prevent pedestrian slips and vehicle damage.

II. Core Advantages

1. High Strength & Durability

Tensile strength (60 ksi) and yield strength (40 ksi) exceed gray iron (31 ksi), with impact/fatigue resistance and a 30+ year lifespan.
Superior corrosion resistance to acid rain, salt spray, and freeze-thaw cycles (-40°C to 350°C), ideal for coastal/rainy regions.

2. Functionality & Aesthetics

Custom Design: Colors (e.g., bronze, forest green) and textures blend with urban landscapes, enhancing visual appeal.
Eco-Friendly: Open structure ensures root aeration and reduces soil compaction, promoting tree health.

3. Easy Installation & Maintenance

Snap-fit modular design enables tool-free, single-worker installation, reducing labor costs.
Routine maintenance requires only water rinsing, with 50% lower lifecycle costs vs. composite materials.

4. Cost Efficiency & Sustainability

Lower cost than cast steel, 100% recyclable, and aligns with green city initiatives.
High-density material (7.3 g/cm³) deters theft due to low scrap value.

III. Applications

1. Urban Streets & Parks: Protects tree roots from foot traffic/vehicles while enhancing greenbelt aesthetics.
2. Commercial Plazas & Residential Areas: Custom logos/patterns boost branding and suit upscale community landscapes.
3. Harsh Environments:

Coastal Zones: Galvanized finishes resist chloride corrosion.
Cold Climates: Withstands -40°C without cracking, ensuring long-term performance.

IV. Standards & Selection Guidelines

Certifications: Complies with EN 124 (EU load standards) and GB/T 23858 (China). Prioritize ISO 9001-certified suppliers (e.g., Shandong Liancheng, Zibo Baist).

Selection Criteria:

Size Compatibility: Modular components minimize cutting waste for irregular tree pits.
Load Rating: Use C250-grade (25 tons) for pedestrian zones and E600-grade (60 tons) for roadways.

Summary

Ductile iron tree grates revolutionize urban greening through ecological protection, artistic customization, and extreme durability. Key strengths:

1. Root-Friendly Design: Optimized permeability supports tree health, reducing municipal upkeep.
2. Aesthetic Upgrade: Custom patterns elevate cultural identity, enabling "unique streetscape" initiatives.
3. Lifecycle Economy: 20+ year lifespan with 50% lower costs vs. traditional solutions.
A strategic choice for urban renewal, cultural districts, and eco-parks, particularly where functionality and aesthetics converge.