Heat Resistant Stainless Steel Tube

Heat resistant stainless steel tubes are used where ordinary stainless steel tubing may not provide the required performance under elevated-temperature service. JiLaiDa, a professional manufacturer from China supplies seamless tubes in 310, 310S, 304H, 321H, N06625 and Inconel 718, with different grades and surface conditions available according to the equipment design, operating environment and downstream fabrication requirements. The tubes can be supplied with custom dimensions and EN 10204 3.1 material documentation for industrial projects.

What Is a Heat Resistant Stainless Steel Tube?

A Heat Resistant Stainless Steel Tube is a seamless metal tube manufactured from heat-resistant stainless steel or nickel-based alloys for high-temperature equipment and thermal processing systems. Grades such as 310, 310S, 304H, 321H, N06625 and Inconel 718 are selected according to the required temperature, atmosphere, mechanical load and service conditions.

Key Features

1. High-Temperature Resistance

Designed for elevated-temperature service, with heat-resistant grades selected according to operating temperature, atmosphere and mechanical loading.

2. Oxidation Resistance

Grades such as 310 and 310S provide good resistance to oxidation in high-temperature air and are commonly used for furnace and thermal-processing components.

3. Seamless Construction

The Heat Resistant Stainless Steel Tube has no longitudinal weld seam, making it suitable for high-temperature components exposed to thermal expansion and contraction.

4. Multiple Heat-Resistant Grades

Available grades include 310, 310S, 304H, 321H, N06625 and Inconel 718, covering different combinations of temperature resistance, corrosion resistance and mechanical performance.

5. Stable Wall Thickness

Available wall thicknesses range from 3–9 mm, with a stated tolerance of ±0.3 mm, supporting consistent forming, machining and assembly.

Product Applications

1. Furnace Radiant Tubes

310 and 310S tubes can be used for furnace-related components where high-temperature oxidation resistance is required. Final grade selection depends on furnace atmosphere, operating temperature and mechanical loading.

2. Heat Treatment Equipment

Heat-resistant stainless steel tubes can be incorporated into heating and thermal-processing equipment that operates under repeated heating and cooling cycles.

3. Reformer and Process Equipment

Selected stainless steel and nickel-based alloy grades can be used for high-temperature process components where both temperature resistance and resistance to the process atmosphere must be considered.

4. Boiler and High-Temperature Tubing

304H and 321H may be considered for applicable boiler and heat-transfer components according to pressure, temperature and relevant design standards.

5. Waste-to-Energy and Thermal Processing

Higher-alloy heat-resistant grades can be evaluated for components exposed to elevated temperatures and corrosive flue-gas environments.

Surface Options

Not every high-temperature tube requires a polished surface. We can supply different surface conditions according to the customer's fabrication and application requirements:

Rough / As-Extruded

Suitable where the tube will be further processed, machined or incorporated into an enclosed furnace assembly.

Pickled

Provides a cleaned surface after processing and can be selected when a more controlled surface condition is required.

Polished

Suitable where a smoother surface is required for the final application.

Bright-Finished

Available for applications where appearance or a specific finished surface condition is part of the specification.

Typical Grade Selection

Why Choose Ji Lai Da?

Jiangsu Ji Lai Da Nickel-Based Alloy Co., Ltd. supplies a range of heat-resistant stainless steel and nickel-based alloy tubes rather than limiting customers to a single grade or surface finish.

1. Multiple heat-resistant grades

310, 310S, 304H, 321H, N06625 and Inconel 718.

2. Seamless tube supply

Suitable for applications requiring seamless construction and further fabrication.

3. Custom dimensions

OD, wall thickness and length can be specified according to project requirements.

4. Material documentation

EN 10204 3.1 MTC and third-party inspection options are available according to order requirements.

5. Flexible delivery terms

FOB, CIF and DDP can be arranged for international orders.

FAQ

Q1: What is the difference between 310 and 310S?

310S is the lower-carbon variant of 310. The lower carbon content can be advantageous for certain fabricated components, particularly where welding and prolonged exposure to elevated temperatures are involved. The appropriate grade should be selected according to the fabrication method and service conditions.

Q2: When should I choose 310 instead of a nickel-based alloy?

310 can be suitable where high-temperature oxidation resistance is the primary requirement and the mechanical and corrosion conditions are within the grade's capabilities. A nickel-based alloy may be more appropriate when the application requires a different combination of mechanical strength, corrosion resistance or environmental performance.

Q3: Can these tubes be used for furnace radiant tubes?

310 and 310S are commonly considered for furnace radiant tube applications. Final selection should take into account furnace temperature, atmosphere, tube loading, dimensions and required service life.

Q4: Can I order a rough surface instead of a polished tube?

Yes. Rough, pickled, polished and bright-finished conditions can be supplied according to the application. Rough tube is often suitable when the product will undergo further fabrication or when the surface will not remain exposed in the final assembly.