What Are Heat Treatment Trays?
A heat treatment tray, also known as a heat treat tray, furnace tray, alloy tray or carburizing tray, is a reusable heat-resistant furnace fixture designed to support, separate and transport metal parts during carburizing, annealing, hardening, normalizing, tempering and other heat treating processes. Manufactured from heat-resistant steel or high-temperature heat-resistant alloys, these trays are engineered to withstand repeated thermal cycles, heavy loading and prolonged exposure to demanding industrial furnace atmospheres. Their open-grid structures promote uniform heat circulation while helping maintain stable workpiece positioning and reduce distortion during processing.
ECOOSUN manufactures custom heat treatment trays and related heat treatment fixtures according to customer drawings, furnace dimensions, operating temperatures, furnace atmospheres and loading requirements. Depending on tray size, alloy grade and structural complexity, manufacturing methods may include sand casting, investment casting and lost foam casting. Our engineering team supports alloy selection, rib-layout optimization, support-point design, machining and dimensional inspection to produce reliable heat-resistant castings, custom furnace components and replacement furnace parts with consistent quality and extended service life.
OUR PRODUCTS Custom Heat Treatment Trays
Explore our range of custom heat treatment trays, furnace trays, alloy trays and carburizing trays manufactured for demanding industrial furnace and heat treating applications. Every tray can be produced according to customer drawings, furnace dimensions, operating temperatures, loading conditions and required heat-resistant alloy grades. We support OEM manufacturing, replacement furnace parts and new product development for heat treatment equipment manufacturers, commercial heat treaters and furnace service companies.
Custom heat treatment tray engineered for stable loading and uniform airflow during demanding heat treating cycles.
Durable heat treat tray made from heat-resistant alloy for repeated high-temperature industrial furnace operation.
Heavy-duty furnace tray designed for carburizing, annealing, hardening and other heat treatment processes.
Precision-cast alloy tray providing excellent dimensional stability, load capacity and extended service life.
Carburizing tray built to resist oxidation, thermal fatigue and deformation in controlled-atmosphere furnaces.
Heat-resistant casting tray manufactured using sand casting, investment casting or lost foam casting.
Custom cast steel tray produced to your drawings, furnace dimensions, operating temperature and loading requirements.
OEM/ODM furnace component with optimized rib design for reliable performance and fewer replacement cycles.
1. Designed for Your Furnace, Load and Thermal Cycle
A heat treatment tray must remain stable while supporting metal parts through repeated heating, soaking and cooling cycles. Its performance depends not only on operating temperature, but also on tray span, support locations, load distribution, furnace atmosphere and the way workpieces are positioned. ECOOSUN engineers each custom heat treat tray, furnace tray and carburizing tray around the actual furnace chamber, loading system and production process rather than relying on a standard design.
For carburizing, annealing, hardening, tempering and other heat treating applications, we select the appropriate heat resistant alloy and optimize the tray’s rib pattern, open area, wall thickness and stacking interfaces. A well-designed alloy tray promotes more uniform heat and atmosphere circulation, reduces local stress and high-temperature distortion, and provides dependable support inside demanding industrial furnace and heat treatment equipment environments.
See the full range of heat treatment furnace parts for loading, heating and conveying applications.
2. Built to Match Your Existing Furnace Layout
Replacing a heat treatment tray involves much more than matching its overall length and width. The new tray must align correctly with furnace rails, rollers, support points, lifting devices, stacking interfaces and available chamber clearances. ECOOSUN manufactures custom heat treat trays, furnace trays, alloy trays and carburizing trays from customer drawings, 3D models or approved samples, with careful control of critical dimensions, tray height, flatness and installation interfaces.
When complete technical drawings are unavailable, our engineering team can reconstruct the required dimensions from an existing or worn tray and review the areas affected by distortion, cracking or oxidation. We may then optimize the rib layout, wall thickness, open area and load-support zones while preserving compatibility with the original industrial furnace and loading system. The result is a direct-fit replacement heat treatment furnace part that reduces installation adjustments and helps restore stable operation in batch furnaces, continuous furnaces, roller hearth furnaces and carburizing heat treatment equipment.
Related load and positioning solutions include heat treatment baskets and heat treatment fixtures.
Selecting a Furnace Tray for the Load and Conveying System
A furnace tray must support the workpieces without blocking the heat and atmosphere flow required by the process. Key design inputs include the loaded weight, contact pattern, support spacing, grid orientation, nesting or stacking method, transfer mechanism and the locations where operators or automation lift the tray. In continuous equipment, interaction with walking beams, pusher systems or furnace rolls also affects edge design, flatness and local reinforcement.
Common cast heat-resistant grade references include HK40, HU, HF, HH and GX40CrNiSi25-20. Grade selection should follow the real temperature, atmosphere, time at temperature, load and thermal-cycle severity. A thicker section is not always a complete solution: abrupt thickness changes can increase thermal gradients, while poorly positioned ribs may add weight without controlling the actual deformation mode. Failed trays should be reviewed for crack origin, sagging direction, oxidation pattern and contact damage before a replacement design is finalized.
For quotation, send: the drawing or sample dimensions, loaded weight, workpiece contact layout, furnace support or conveying arrangement, cycle and atmosphere, critical flatness requirements and photographs of the old tray after service.
Compare heat treatment baskets for open load containment, heat treatment fixtures for precise workpiece location, and furnace rolls when trays travel through a roller hearth line.
The alloy selected for a heat treatment tray directly determines its resistance to high-temperature creep, oxidation, carburization and thermal-fatigue cracking. A tray used for carburizing faces different operating demands from one used for annealing, hardening or tempering. Furnace temperature, atmosphere, load weight, support span and heating frequency must therefore be evaluated before selecting the appropriate heat-resistant steel.
ECOOSUN recommends heat-resistant alloy grades according to actual furnace conditions and tray duty. We consider maximum temperature, dimensional stability, load-bearing strength, expected service life and replacement cost. By matching the alloy to the tray design and industrial furnace process, we help reduce premature deformation, surface degradation and unnecessary material expense while maintaining reliable performance throughout repeated heat treatment cycles.
Review temperature, atmosphere and oxidation factors in our heat-resistant alloy selection guide.
Reliable heat treatment furnace parts depend on controlled manufacturing at every stage. From alloy melting and casting to machining and final inspection, each process is carefully monitored to ensure dimensional accuracy, material consistency and dependable high-temperature performance.
Every heat-resistant steel casting undergoes chemical composition analysis, dimensional inspection and visual quality verification before shipment. Additional testing and complete quality documentation can also be provided when required. Combined with proven casting processes and strict traceability, these controls ensure that every heat treatment tray, basket, fixture and industrial furnace component meets customer drawings, operating conditions and installation requirements. The result is consistent quality, easier replacement and reliable service in demanding heat treatment equipment.
A warped, cracked or heavily oxidized heat treatment tray can interrupt furnace loading, reduce batch capacity and delay an entire heat treating schedule. ECOOSUN supports urgent replacement projects by reviewing existing drawings, worn trays or physical samples, then confirming dimensions, alloy grade and operating conditions. This shortens development time for custom heat treatment trays, furnace trays and carburizing trays used in demanding industrial furnaces.
For repeat orders, approved drawings, inspection records and dedicated tooling can be retained to reduce production lead time. Our teams coordinate alloy sourcing, casting, machining and inspection to deliver replacement heat treatment furnace parts with accurate fit and consistent quality. We help furnace manufacturers, commercial heat treaters and maintenance companies minimize downtime and return their heat treatment equipment to stable production.
For deformation, cracking and oxidation diagnosis, see our furnace parts failure analysis.
ECOOSUN supports customers beyond manufacturing individual heat treatment trays. We work with heat treatment equipment manufacturers, commercial heat treaters, furnace service companies and industrial users to develop tray solutions matched to furnace layout, loading method, atmosphere and production targets. From application review through repeat-order supply, we manage custom heat treatment trays, furnace trays, alloy trays and carburizing trays as long-term component programs.
Our support includes heat-resistant alloy selection, drawing review, structural improvement, tray-family standardization, tooling management and replacement planning. Approved drawings, inspection requirements and production records can be retained to maintain consistency across future orders and multiple furnace lines. By combining application knowledge, casting capability and responsive engineering support, we simplify the sourcing of critical industrial furnace components and maintain reliable tray performance throughout the equipment lifecycle.
A heat treatment tray is a reusable furnace fixture designed to support, separate and transport metal components during heating, soaking, carburizing, annealing, hardening, tempering and cooling.
Unlike a closed container, its open-grid structure allows heat and furnace atmosphere to circulate around the workpieces while maintaining stable positioning throughout the heat treatment process.
The terms heat treatment tray, heat treat tray and furnace tray are often used for the same general type of furnace charging component.
However, the final tray design varies according to furnace type, support method, loading system, operating temperature, atmosphere and the geometry of the parts being processed.
An alloy tray is a furnace tray manufactured from a high-temperature heat resistant alloy or heat-resistant cast steel.
The alloy is selected to provide the required balance of oxidation resistance, carburization resistance, high-temperature strength, dimensional stability and production cost.
A carburizing tray is a heat-resistant tray designed for use in carburizing furnaces and controlled-atmosphere heat treating applications.
Because carburizing atmospheres can accelerate carbon absorption, oxidation and material degradation, tray material and structural design must be selected according to temperature, carbon potential, loading and cycle frequency.
Our custom heat treatment trays can be developed for batch furnaces, continuous furnaces, roller hearth furnaces, pusher furnaces, sealed-quench furnaces, atmosphere furnaces and other types of heat treatment equipment.
Compatibility depends on furnace chamber dimensions, rails, rollers, support points, loading direction, lifting system and available clearances.
Heat treatment trays may be used for:
- Carburizing
- Annealing
- Hardening
- Tempering
- Normalizing
- Stress relieving
- Solution treatment
- Controlled-atmosphere heat treatment
The correct heat treat tray design depends on the thermal cycle, furnace atmosphere, workpiece load and handling method.
A suitable tray design should consider:
- Furnace chamber dimensions
- Rail, roller or support locations
- Workpiece size and distribution
- Total loading weight
- Maximum operating temperature
- Furnace atmosphere
- Heating and cooling frequency
- Required open area
- Stacking and lifting method
- Previous distortion or cracking problems
These factors determine tray thickness, rib layout, grid opening, support span and alloy grade.
Yes. ECOOSUN manufactures custom heat treatment trays, furnace trays and alloy trays according to customer-supplied 2D drawings, 3D models, material specifications and operating requirements.
Before production, we review critical dimensions, flatness requirements, support interfaces, lifting points, stacking features and machining locations.
Yes. When complete technical drawings are unavailable, we can evaluate an existing tray, physical sample or detailed measurement record.
Our engineering team can reconstruct the original geometry and identify areas affected by creep deformation, cracking, oxidation or uneven loading before preparing the replacement design.
For an accurate quotation, please provide:
- Drawing, 3D model or sample photographs
- Overall dimensions and critical tolerances
- Required material grade
- Normal and maximum operating temperature
- Furnace atmosphere
- Maximum load per tray
- Support and stacking method
- Heating and cooling cycle
- Required quantity
- Current tray life and failure mode
This information helps us evaluate alloy consumption, tooling, casting process, machining and lead time.
There is no single heat resistant alloy suitable for every tray application.
The correct material depends on operating temperature, furnace atmosphere, load weight, support span, thermal cycling and expected service life. Different heat resistant alloys provide different levels of creep strength, oxidation resistance, carburization resistance and thermal-fatigue resistance.
Yes. We manufacture custom furnace trays using different grades of heat resistant steel, heat-resistant cast steel and high-temperature alloys.
Material selection should be based on the complete operating condition rather than maximum temperature alone.
There is no universal maximum temperature for every heat treatment tray.
Temperature capability depends on alloy grade, tray span, support locations, loading weight, furnace atmosphere, cycle duration and acceptable deformation. A lightly loaded tray may perform differently from the same tray under heavy loading and frequent thermal cycling.
Load capacity depends on:
- Alloy strength at operating temperature
- Tray dimensions and unsupported span
- Rib pattern and wall thickness
- Support-point locations
- Workpiece distribution
- Stacking configuration
- Heating duration
- Thermal-cycle frequency
Room-temperature strength alone cannot determine the safe load of high-temperature furnace components.
Tray flatness affects loading stability, stacking, workpiece positioning and movement through the furnace.
Excessive warping can interfere with furnace rails, rollers, transfer mechanisms and automatic loading equipment. Flatness requirements should therefore be identified together with the actual support conditions and operating temperature.
Deformation risk can be reduced through appropriate alloy selection, balanced rib distribution, shorter unsupported spans, suitable wall thickness and correctly positioned support points.
We also review loading concentration, sharp structural transitions and stacking interfaces when optimizing a custom heat treat tray.
The open-grid structure influences airflow, atmosphere circulation, tray weight and mechanical strength.
A larger open area may improve heat circulation and reduce tray mass, but insufficient rib support can increase deformation. The grid pattern must balance thermal performance with load-bearing requirements.
Uneven workpiece placement can create concentrated stress and local overheating, causing an alloy tray to bend or crack even when the total load is within the expected range.
The tray layout and loading instructions should distribute weight across the principal ribs and supported areas whenever possible.
Oxidizing, carburizing, nitriding, reducing and vacuum environments create different material risks.
The atmosphere can influence oxidation, carburization, scaling, embrittlement and surface degradation. For this reason, heat resistant alloy selection must consider both temperature and furnace atmosphere.
Some tray designs may be suitable for vacuum furnace applications, but material cleanliness, outgassing, operating temperature, vacuum level and contamination requirements must be reviewed carefully.
Projects involving vacuum furnace spare parts should be evaluated separately rather than using a standard atmosphere-furnace tray design.
