Pit Furnace Heat Treatment Fixture Manufacturer | Custom Furnace Fixtures – FH®

Product Specification

Pit Furnace Heat Treatment Fixture | Custom Vertical Furnace Fixtures – FH® Alloy
Custom Multi-Layer Heat Treatment Fixtures for Pit Furnaces

FH® Alloy, a brand of Wuxi Junteng Fanghu Alloy Technology Co., Ltd., manufactures custom pit furnace heat treatment fixtures for high-temperature industrial applications.

Designed specifically for vertical furnace loading, this fixture system combines circular trays, vertical support posts, locating structures and a top supporting frame to create a stable multi-layer loading assembly.

The fixture can be customized according to the customer's pit furnace dimensions, workpiece geometry, operating temperature, load capacity, furnace atmosphere and heat treatment process.

[Request a Quote]
[Send Your Drawing]

Designed for Pit Furnace Applications
Pit furnaces require a different fixture structure from conventional batch or roller hearth furnaces.

Because the furnace chamber is deep and vertically arranged, the fixture must provide:

• Stable vertical support
• Controlled layer spacing
• Reliable workpiece positioning
• Adequate furnace atmosphere circulation
• Sufficient structural rigidity
• Convenient loading and unloading

FH® develops pit furnace fixtures according to the customer's actual furnace and production conditions rather than using a standard universal structure.

Multi-Layer Loading Structure
The fixture shown uses a vertical multi-layer configuration.

Multiple circular heat treatment trays can be assembled with support posts to create the required loading height.

This structure helps:

• Increase usable furnace capacity
• Improve workpiece distribution
• Maintain controlled spacing between layers
• Reduce direct contact between loaded components
• Improve production efficiency per furnace cycle

The number of layers and spacing can be customized according to workpiece height and furnace dimensions.

Circular Open-Grid Trays
The circular trays use an open-grid design suitable for the cylindrical chamber of a pit furnace.

Compared with a solid plate, an open structure can:

• Promote furnace atmosphere circulation
• Improve heat transfer around the workpieces
• Reduce unnecessary fixture mass
• Provide multiple support and positioning areas
• Allow the structure to be optimized for thermal expansion

Grid geometry, supporting positions and tray thickness can all be customized.

Vertical Support Posts & Positioning System
The vertical columns form the main supporting structure of the complete fixture assembly.
FH® can customize:

• Support post diameter
• Post position
• Layer spacing
• Connection structure
• Locating interfaces
• Tray support points
• Top frame structure
• Overall fixture height

Proper support layout is particularly important for controlling deformation in tall pit furnace fixture assemblies.

Engineered for Repeated High-Temperature Cycles
Pit furnace fixtures are repeatedly subjected to:
Heating → Soaking → Cooling → Reloading
During long-term service, furnace fixtures may experience:

• Thermal fatigue
• High-temperature creep
• Oxidation
• Structural deformation
• Cracking around highly stressed areas

FH® evaluates the material grade and fixture structure together to improve dimensional stability and service life under the actual operating conditions.

Heat-Resistant Alloy Options
The correct alloy depends on temperature, furnace atmosphere, cooling method and loading conditions.

Common material options for FH® heat treatment fixtures include:
1.4848 / 1.4849 / 1.4852 / 2.4879 / 310S / HE / HF and other heat-resistant alloys

Material selection can be based on:

• Maximum operating temperature
• Continuous or intermittent operation
• Furnace atmosphere
• Total loading weight
• Heating cycle
• Cooling method
• Required creep resistance
• Oxidation resistance
• Expected service life

Technical Specifications

Custom Designed for Your Furnace & Workpiece
More Than Overall Dimensions
A reliable pit furnace fixture must be designed around the entire heat treatment process.
FH® considers:

• Furnace inner diameter
• Effective furnace height
• Workpiece dimensions
• Workpiece orientation
• Quantity per layer
• Number of loading layers
• Weight per layer
• Total fixture load
• Maximum operating temperature
• Furnace atmosphere
• Heating and cooling cycle
• Loading and lifting method

This helps ensure that the fixture structure is properly matched to the real operating environment.

Information Required for Quotation
For faster technical evaluation, please provide:

1. Pit furnace inner diameter
2. Available loading height
3. Workpiece drawing or photos
4. Quantity of workpieces per layer
5. Required number of layers
6. Load weight per layer
7. Total load
8. Maximum operating temperature
9. Furnace atmosphere
10. Heating and cooling method
11. Required alloy grade, if specified
12. Existing fixture drawing, if available

No Fixture Drawing?
That is also workable.
If you provide the furnace conditions and workpiece information, FH® can develop a customized pit furnace fixture structure according to the application.

Advantages of FH® Pit Furnace Fixtures
✔ Custom Multi-Layer Design
Layer quantity, spacing and supporting structures are engineered around the actual workpiece.
✔ Optimized Vertical Stability
Support posts and connection points can be arranged to improve the stability of tall fixture assemblies.
✔ Open Structure for Heat Circulation
Circular grid trays help maintain furnace atmosphere circulation throughout multiple loading levels.
✔ High-Temperature Alloy Selection
Different heat-resistant alloys can be selected according to the operating environment.
✔ OEM & Engineering Support
FH® supports both customer-drawing manufacturing and fixture development based on operating conditions.

Typical Applications
FH® pit furnace heat treatment fixtures can be designed for:

• Turbine components
• Shafts
• Gears
• Long cylindrical parts
• Automotive components
• Aerospace components
• Precision castings
• Forgings
• Mechanical components
• Other industrial metal parts

Why Choose FH® Alloy?
Wuxi Junteng Fanghu Alloy Technology Co., Ltd. (FH® Alloy) specializes in heat treatment fixtures and high-temperature furnace components.

Our product range includes:

• Pit furnace fixtures
• Heat treatment racks
• Heat treatment trays
• Furnace base trays
• Heat treatment baskets
• Vacuum furnace fixtures
• Roller hearth furnace fixtures
• Furnace rollers
• Radiant tubes
• Custom heat-resistant alloy castings

We provide support through the complete project process:
Working Conditions → Material Selection → Fixture Design → Manufacturing → Inspection → Delivery

Need a Custom Pit Furnace Fixture?
Send us your furnace dimensions, workpiece drawing, operating temperature and loading requirements.
FH® Alloy can develop and manufacture a custom pit furnace heat treatment fixture matched to your furnace and production process.
[Request a Quote]
[Send Your Drawing]
[Discuss Your Furnace Conditions]

FAQ
Q1: What is a pit furnace heat treatment fixture?
A pit furnace heat treatment fixture is a vertically arranged furnace loading system used to support and position workpieces inside a deep cylindrical heat treatment furnace.

Q2: Can the number of fixture layers be customized?
Yes. Layer quantity and spacing can be customized according to furnace height, workpiece dimensions and load requirements.

Q3: Can the tray diameter be customized to our furnace?
Yes. The circular tray diameter and complete fixture dimensions can be designed according to the usable internal dimensions of the furnace.

Q4: What materials are available?
FH® can manufacture pit furnace fixtures using different heat-resistant alloys. The final grade should be selected according to temperature, atmosphere, load and cooling conditions.

Q5: Can FH® manufacture according to our existing fixture drawing?
Yes. We support OEM manufacturing according to customer drawings and technical specifications.

Q6: What if we do not have a fixture drawing?
You can provide the furnace dimensions, workpiece information, temperature, loading requirements and process conditions. FH® can evaluate these parameters and develop a suitable fixture solution.