FH® 1.4825 Heat Treatment Fixture | Engineered for Tempering Furnaces (Air / Protective Atmosphere)

FH® Heat Treatment Fixture for Tempering Furnace

Key Benefits

• Thermally Stable Design
  Engineered to withstand repeated heating and cooling cycles between 150°C–700°C without progressive warping or loosening of joints.
• No Scale, No Contamination
  Smooth surface and oxidation-resistant material prevent loose scale formation – keeps workpiece surfaces clean and reduces post-treatment cleaning.
• Uniform Airflow / Heat Transfer
  Open grid or perforated design allows optimal hot air circulation – minimizes temperature gradients across loaded parts.
• Lightweight Yet Strong
  Optimized section thickness reduces thermal mass (faster heating/cooling) while maintaining sufficient load capacity.
• Custom Configurations
  Trays, stacking grids, hanging fixtures, or part-specific nests – designed for your furnace size and part geometry.
  
  

Technical Specifications

Why Choose FH® Tempering Furnace Fixtures?
1. Designed for Tempering – Not Just Repurposed Hardening Fixtures
Many shops use the same baskets for hardening and tempering. Hardening fixtures are often too heavy (high thermal mass) and have rough surfaces that scale and flake at tempering temperatures. FH® tempering fixtures are optimized specifically for this lower-temperature, long-cycle application.

2. Material Selection for Tempering

3. Clean Operation – No Scale Flaking

• Pre-oxidized surface forms a stable oxide layer
• No sharp weld spatter or rough cast surfaces
• Parts come out clean – reduces or eliminates secondary cleaning

4. Lightweight = Energy Efficient
FH® tempering furnace fixtures use thinner, optimized sections (without sacrificing strength). Lower thermal mass means:

• Faster furnace heat-up
• Reduced energy consumption
• Quicker turnaround between cycles

Applications

• Air tempering furnaces
• Protective atmosphere tempering (N₂, endogas)
• Vacuum tempering (with appropriate material)
• Stress relieving (400–650°C)
• Parts: gears, shafts, bearings, springs, tools, dies, fasteners

Material Grade Table:

Genuine Photos of FH® Heat Treatment Fixtures

Ordering Process

• Provide furnace internal dimensions and part photos
• Specify operating temperature and atmosphere
• Share load weight per cycle
• FH® proposes grid design, material grade, and thickness
• Production: 7–12 working days
• Delivery includes: inspection report and care instructions
  
  

FAQ:

Q1: Why can't I just use my hardening fixtures for tempering?
A: You can, but it's not optimal. Hardening baskets are typically heavier (higher thermal mass, slower cycles) and often have rough surfaces that can scale and flake at tempering temperatures, potentially contaminating your parts. FH® tempering fixtures are lighter, have smooth surfaces, and are designed specifically for clean, efficient tempering.

Q2: Will the fixture warp after many cycles?
A: Minimal. FH® tempering fixtures are stress-relieved during manufacturing and use reinforced grid designs. Typical distortion after 500 cycles is <2 mm over 500 mm length. To maximize life, avoid quenching the fixture (allow it to cool with the furnace or in still air).

Q3: How do I clean the fixture?
A: Light wire brushing or bead blasting every 100–200 cycles is usually sufficient. If scale does form, avoid heavy grinding – it can create rough spots that will scale again faster. For carbon steel fixtures, occasional re-blasting removes rust.

Q4: Do you offer hanging fixtures for long parts (shafts, bars)?
A: Yes. FH® designs hanging trees, pin racks, and vertical fixtures for shafts, long tubes, and bars. We just need part length, hanging point location, and furnace height.

Q5: What is your warranty?
A: 12 months against manufacturing defects (weld cracks, material flaws). Normal thermal discoloration, minor surface oxidation, and gradual warp are considered wear – not covered. Every fixture is inspected before shipment for flatness and weld integrity.