High Temp Stainless Steel Furnace Liner Muffle Tube

The muffle tube is the core high-temperature resistant inner chamber of continuous mesh belt heat treatment furnaces, bright annealing furnaces, carburizing quenching furnaces and brazing furnaces.

It is a sealed heat-resistant metal cavity that separates heating elements & insulation refractory from workpieces and protective atmosphere. It encloses parts in a stable sealed atmosphere chamber to prevent metal oxidation & decarburization under high temperature, ensuring bright, defect-free finished workpieces with consistent hardness.

1. SUS310S / 0Cr25Ni20 (Standard Grade) Continuous working temp: 950~1050℃, excellent anti-carburization & oxidation resistance, compatible with nitrogen, hydrogen, ammonia decomposition atmosphere. Widely used for mesh belt annealing & quenching furnaces, cost-effective for mass production lines.
2. Nickel-base Alloy Inconel 601 / HK-40 Max long-term temp up to 1200℃, double service life vs SUS310S. For extreme high-temperature & heavy carburizing processes, ideal for automotive fastener & semiconductor brazing furnaces.
3. 304 / 316L Stainless Steel For low-temp tempering & drying furnaces below 600℃, strong acid & moisture corrosion resistance, lower investment cost.

1. Corrugated Thermal Expansion Buffer Design Horizontal corrugated reinforcing ribs absorb thermal expansion stress at high temperature, effectively prevent bulging, weld cracking & gas leakage, extend service life by over 30%.

2. Fully Sealed Air-tight Welding Craft Integrated bending & full penetration welding to minimize joint seams. Every liner passes air pressure leak test & NDT inspection before delivery, zero atmosphere leakage to avoid oxidized defective parts.

3. Thickened Plate & External Reinforcing Strips Heavy-gauge base & side plates with outer supporting bands, anti-collapse under long-term mesh belt load operation.

4. Full Custom Dimension Support Custom length (1m~25m), width, arch height, inlet/outlet flange per customer furnace drawing, compatible with all domestic & imported continuous mesh belt furnaces.

5. Multi-atmosphere Compatibility Works perfectly with nitrogen, hydrogen, ammonia decomposition, endothermic carburizing atmosphere, fit for bright annealing, carbonitriding, brazing, tempering processes.

1. Automotive parts: fasteners, screws, springs, bearing carburizing & bright quenching mesh belt furnaces

2. Powder metallurgy: iron & copper powder sintering furnaces

3. Metal strip: stainless steel & copper strip continuous bright annealing lines

4. Electronics & semiconductor: cold plate copper substrate vacuum brazing furnaces

5. Hardware tools: cutting tools, chain tempering & carbonitriding production lines Matching equipment: mesh belt quenching furnace, mesh belt temper furnace, ammonia decomposition bright furnace, continuous brazing furnace

Q1：What is the service life of muffle tube?

A: SUS310S grade: 8~18 months under normal working condition; Nickel alloy grade: 2~3 years, depends on working temperature & carburizing atmosphere concentration.

Q2: Can you customize size according to my furnace drawing?

A: Yes, we support 100% non-standard customization, send us your dimension drawing, we provide free design & quotation within 24 hours.

Q3: How to guarantee air tightness?

A: All products pass 0.3MPa air pressure holding test and weld flaw detection, no gas leakage during long-term production.

Q4: What package for sea transportation?

A: Wooden case with foam protection, fixed steel bracket inside, anti-collision & moisture-proof for long ocean shipping.