High-Performance Custom Grate Bars for Industrial Applications

For over 30 years, Prime Custom Parts has been a trusted global manufacturer of durable and heat-resistant grate bars. Leveraging our 10 advanced production lines and ISO 9001 certified quality system, we deliver tailor-made grate bars for sintering plants, pelletizing machinery, and industrial furnaces worldwide. Partner with us for reliable quality, competitive pricing, and on-time delivery that your projects can depend on.

Why Choose Prime Custom Parts as Your Grate Bar Supplier?

Choosing the right grate bar supplier directly affects your furnace uptime, maintenance cost, and overall efficiency.

ISO 9001 Certified Quality

Every grate bar undergoes rigorous inspection, from raw material analysis to final dimensional checks, ensuring it meets the highest international standards and performs reliably in demanding conditions.

30+ Years of Expertise

Our deep industry experience allows us to optimize grate bar designs for longevity and performance, helping you reduce unplanned shutdowns, spare parts consumption, and long-term operating costs.

One-Stop Solution

From casting and welding to CNC machining and finishing, we handle the entire grate bar production process in-house. This simplifies your supply chain and gives you a single, accountable partner.

Flexible Customization

Whether you have detailed drawings or only a worn sample, our engineering team will work with you to develop the grate bar profile, alloy, and fit that best matches your furnace and fuel conditions.

Reliable & Fast Delivery

With 10 production lines and controlled in-house scheduling, we maintain stable output and adhere to agreed delivery dates, keeping your maintenance plans and new projects on track.

Explore Our Grate Bar Product Lines

Precision-engineered grate bar solutions tailored for diverse industrial applications, from biomass boilers to waste incineration systems.

Our Grate Bar Manufacturing Capabilities

Materials	High-chromium cast iron (Hi-Cr) for excellent wear and corrosion resistance in high-temperature, abrasive environments. Heat-resistant alloy steels such as ZG35Cr24Ni7SiN and ZG40Cr25Ni20Si2 for long service life under continuous thermal cycling. Carbon steel grades for standard temperature applications or cost-sensitive projects. Other special alloys developed according to your specifications and furnace working conditions (waste-to-energy, biomass, coal, sintering, etc.).
Casting Process	Investment casting for complex grate bar geometries and tighter dimensional requirements. Sand casting for medium to large grate bars, heavy-duty sections, and higher volume production. We select the most economical process to balance tooling cost, surface finish and mechanical performance for each project.
Size & Weight Range	Typical single-piece weight range: 5 kg to 500 kg per grate bar, depending on design and application. Custom sizes outside this range can be evaluated by our engineering team based on your drawings and furnace layout.
Post-Processing	Heat treatment (normalizing, quenching and tempering, solution treatment) for stable mechanical properties and resistance to thermal shock. Precision machining of critical contact surfaces, mounting faces and pin holes to ensure smooth installation and alignment. Surface finishing such as shot blasting, grinding of sealing areas and edge rounding to reduce stress concentration and improve wear behavior.
Annual Capacity	Annual casting capacity of up to 10,000 tons of grate bars and related high-temperature components. We support both OEM projects and long-term spare parts programs with stable lead times and reliable deliveries for global customers.

Premium Materials

We work with a comprehensive range of high-performance alloys and materials, each selected for specific application requirements and performance characteristics.

High Chromium Cast Iron

Exceptional wear resistance for mining and crushing applications

Nickel-Based Alloys

Superior corrosion resistance and high-temperature performance

Heat-Resistant Stainless Steel

Optimal for high-temperature industrial environments

Carbon Steel Alloys

Versatile strength and machinability for general applications

Material Type	Max Temperature (°C)	Hardness (HRC)	Tensile Strength (MPa)	Corrosion Resistance
High Chromium Cast Iron	800	58–65	600–800	Good
Nickel-Based Alloy	1200	35–45	900–1200	Excellent
Heat-Resistant Stainless Steel	1000	40–50	700–900	Excellent
Carbon Steel Alloy	600	25–40	500–700	Moderate

Precision Manufacturing Process

Our streamlined 9-step process ensures exceptional quality and rapid turnaround times for your custom metal components.

Step 1: Mold Design

Advanced CAD/CAM design with thermal analysis and flow simulation for optimal casting results.

Step 2: Shell Making

Shell molding machine creates precise resin-coated sand shells using patterns for superior surface finish.

Step 3: Shell Molding Casting

Molten metal poured into assembled shell molds with precise temperature control for optimal results.

Step 4: Sand Cleaning

Automated shot blasting removes shell material and surface oxides, preparing castings for finishing.

Step 5: Cutting & Trimming

Precision cutting removes gates, risers, and excess material using band saws and grinding equipment.

Step 6: Heat Treatment

Controlled atmosphere heat treatment for optimal mechanical properties and stress relief.

Step 7: Precision Machining

CNC machining with ±0.1mm tolerance for precise dimensional accuracy and surface finish.

Step 8: Quality Inspection

Spectral analysis, hardness testing, dimensional inspection, and material traceability documentation.

Step 9: Packaging & Shipping

Secure export packaging and reliable logistics for safe delivery worldwide with full tracking.

Want to know how to compress lead times?

In order to shorten the production and delivery cycle, we suggest that you tell us your needs in detail, and we will adjust the strategy flexibly according to your requirements to ensure your production and help you succeed!

Surface Treatment • High-Performance Grate Bars

High-Performance Grate Bar Surface Treatment

For grate bars working in high abrasion, thermal cycling, and corrosive environments, surface treatment is not decoration — it’s a controllable layer of performance. We combine cleaning, prep, and protective finishes to improve wear life, stabilize fit-up, and support consistent batch quality.

Longer wear life Cleaner edges & stable fit Better coating adhesion Reduced rust & scaling risk Inspection-ready surface

What We Control in Finishing

Process + Inspection

Surface cleanliness & prep standard Removal of scale, sand/slag, and oils; controlled roughness to support coating or hardfacing adhesion.
Edge condition & contact faces Deburring and blending to reduce stress risers and improve seating, alignment, and handling safety.
Protection layer selection Hardfacing / thermal spray / coating / passivation options based on temperature, abrasion level, and media.
Verification before shipment Thickness checks (when applicable), visual criteria, key dimensions, and surface defect screening.

Request Finishing Recommendation

Typical deliverables: finish record, inspection notes, coating spec (if used), and packing protection suggestions (VCI / separators) for export shipments.

Custom wear-resistant grate bars with hardfacing overlay laid out on a workshop workbench for inspection

Recommended finishes by operating condition

High abrasion: hardfacing on wear zones, plus prep blasting for consistent bonding.
Corrosive media: corrosion-resistant coatings / passivation (material-dependent).
High temperature: oxidation/scaling-resistant surface solutions; verify coating suitability vs. service temp.

Quality checkpoints we can add

Visual criteria (pits/porosity/undercut), key dimension confirmation after finishing, thickness sampling (if coated), and simple adhesion/coverage checks as required by your spec.

Packaging protection for finished surfaces

Separator sheets, corner protection, and VCI or rust inhibitors for sea shipments; avoid part-to-part rubbing to protect coated faces and edges.

Advantages of Grate Bars

Engineered for harsh thermal and abrasive conditions, Prime grate bars deliver reliable performance and low total cost of ownership in WtE plants, boilers and kilns.

Exceptional Heat Resistance

Withstands continuous high temperatures without warping or thermal fatigue—ideal for boilers, incinerators and furnaces.

Superior Wear & Corrosion Resistance

High-chromium or nickel alloys resist abrasion, oxidation and corrosive gases—extending service life and maintenance intervals.

Optimized Airflow & Combustion

Precisely cast spacing ensures uniform air distribution, complete fuel burn and reduced clinker formation.

Excellent Structural Strength

Rib-reinforced geometry carries heavy fuel loads and resists impact without cracking.

Custom Design & Alloy Options

Dimensions, alloy grades and coatings tailored to your furnace layout, fuel type and temperature window.

Easy Installation & Replacement

Precision casting tolerances enable quick fit-up and short maintenance downtime.

Proven in Harsh Environments

Trusted by global WtE plants, cement kilns and biomass furnaces for consistent, long-term performance.

Need a downloadable PDF spec or CAD fit check? Contact Prime for tailored recommendations.