321 Heat Treatment Fixture Castings

Product Name: 321 Stainless Steel Heat Treatment Fixture Castings

(Custom Engineered for High-Temp Furnace Applications)

Precision-cast ZG10Cr18Ni9Ti (321 SS) fixtures are optimized for continuous operation in carburizing/annealing furnaces (850-950°C). The titanium-stabilized composition prevents sensitization during prolonged high-temperature exposure, delivering 3x longer service life than standard 304 fixtures in cyclic heating environments.

Customization Focus:
✔ Fixture Geometry Optimization (jigs, baskets, rails with uniform thermal expansion)
✔ Load-Specific Design (up to 2.5kg/cm² at 900°C)
✔ Surface Finish Options (as-cast to machined Ra1.6μm)

1. Application-Tailored Designs

Carburizing Fixtures:

Extra material allowance for anticipated creep deformation

Gas flow-optimized perforation patterns

Vacuum Furnace Components:

Low-outgassing surface treatments

Thermal expansion-matched assemblies

2. Advanced Manufacturing

Thin-Wall Casting: 3-15mm sections with controlled grain flow

Integrated Features:

Hanging lugs

Part-locating pins

Heat-shield attachments

Post-Casting Processing:

Solution annealing (1050°C/water quench)

Stress relief (for dimensional-critical fixtures)

3. Performance Validation

Creep Testing: 1000h @ 900°C under design load

Thermal Cycling: Simulated furnace atmosphere testing

Dimensional Stability: 3D scanned after 50 heat cycles

1. Engineering Support

Thermal Expansion Analysis: FEM simulation of fixture/part interactions

Load Modeling: Stress distribution at operating temperatures

CAD Adaptation: Convert machined/welded designs to optimized castings

2. Rapid Prototyping

3D printed sand molds for concept verification

Functional testing in simulated furnace conditions

3. Special Configurations

Modular Systems: Interlocking fixture components

Hybrid Materials: 321 SS critical areas with low-cost supports

Material Certification:

Heat-specific chemistry (Ti/C ratio verification)

Mechanical properties at temperature

Dimensional Inspection:

CMM for critical locating features

Thermal growth compensation calculations

NDT:

FPVI per ASTM E1417

Optional RT for high-stress areas

Aerospace: Titanium alloy annealing trays

Automotive: Carburizing baskets for gear components

Tool Steel: Vacuum furnace charge carriers

Glass Molding: Precision die holders

20+ Years heat treatment experience

Proven Designs: 300+ fixture configurations in service

Technical Documentation:

Heat treatment maps for critical zones

Furnace compatibility analysis

Certifications:
• ISO 9001:2015 • NADCAP Heat Treat (Optional)

Production Lead Times

This profile emphasizes:
• High-temperature performance with titanium stabilization
• Custom engineering for specific furnace environments
• Dimensional control under thermal cycling
• Seamless integration with existing heat treat processes

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