3Cr24Ni7SiNRe

3Cr24Ni7SiNRe

Dual Sleeve Pipe For Extreme Durability

3cr24ni7sinre dual sleeve pipe (dn200) delivers unmatched abrasion resistance and corrosion protection, ideal for harsh industrial environments like mining and power generation.

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3Cr24Ni7SiNRe

Dual Sleeve Pipe For Extreme Durability

3cr24ni7sinre dual sleeve pipe (dn200) delivers unmatched abrasion resistance and corrosion protection, ideal for harsh industrial environments like mining and power generation.

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3Cr24Ni7SiNRe (Image 5)
3Cr24Ni7SiNRe (Image 6)
3Cr24Ni7SiNRe (Image 7)
3Cr24Ni7SiNRe (Image 8)
The 3Cr24Ni7SiNRe Dual Sleeve Pipe is a specialized, high-performance piping solution designed for extreme industrial applications, particularly those requiring superior abrasion resistance and corrosion protection. With a nominal diameter of 200 mm (DN200 Pipe), this dual sleeve pipe features a double-walled construction: an outer steel shell made from 3Cr24Ni7SiNRe, a high-strength, heat-resistant stainless steel alloy, and an inner ceramic lining, typically composed of high-purity alumina (Al₂O₃) or silicon carbide (SiC). This combination ensures exceptional durability and reliability in industries such as mining, power generation, cement production, chemical processing, and pneumatic conveying systems.

The 3Cr24Ni7SiNRe alloy, enhanced with rare earth elements (Re), offers improved mechanical properties, including high tensile strength and resistance to thermal fatigue, making it ideal for high-temperature and corrosive environments. The inner ceramic lining, with a Mohs hardness of 8-9 or Vickers hardness of HV1100-1500, provides 10-20 times the wear resistance of standard carbon steel pipes. This makes the Ceramic Lined Pipe perfect for transporting abrasive materials like coal, ash, mineral slurries, or cement clinker, which are common in industrial piping applications.

The seamless ceramic lining, such as G 2T® or CER-500, eliminates weak points, reducing wear and preventing clogging, while tiled linings with pre-engineered alumina tiles accommodate complex pipe configurations. The 3Cr24Ni7SiNRe Dual Sleeve Pipe excels in abrasion resistance, ensuring minimal material degradation even under high-velocity material flows. Additionally, the ceramic lining provides robust corrosion protection, withstanding harsh chemicals and temperatures up to 2200°F (1200°C), making it suitable for corrosive environments like chemical plants or boiler systems handling flue gas and ash.

The double-walled design also enhances thermal insulation, reducing heat loss and improving energy efficiency in high-temperature processes. This makes the pipe particularly effective for pneumatic conveying systems and boiler pipeline protection, where both abrasion and thermal stresses are significant concerns.
High Temperature Oxidation Resistance

Withstands extreme temperatures without significant oxidation, ensuring longevity and reliability in furnace applications up to 1150°C.

Superior Corrosion Resistance

Resistant to various corrosive elements found in industrial settings, enhancing durability and performance in aggressive environments.

Excellent Mechanical Properties

Retains mechanical strength and stability even under extreme thermal conditions, making it suitable for demanding structural applications.

What is 3Cr24Ni7SiNRe?

3Cr24Ni7SiNRe is a high-performance austenitic stainless steel alloy specifically engineered for demanding high-temperature applications where conventional materials fail to provide adequate performance. This advanced metallurgical composition represents a sophisticated balance of chromium, nickel, silicon, and rare earth elements.

Manufacturing Process

1. Melting and Casting

Precise chemical composition control using electric arc furnaces or induction melting. Careful addition of rare earth elements to ensure proper distribution.

2. Solution Treatment

Heat treatment at 1100-1150°C to dissolve carbides and achieve uniform element distribution throughout the microstructure.

3. Rapid Cooling

Water quenching to retain austenitic structure and prevent carbide precipitation, ensuring optimal mechanical properties.

4. Quality Control

Comprehensive testing including chemical composition verification, microstructural examination, and mechanical property testing.

Technical Properties

Complete Chemical Composition
Element Composition (%) Function
Carbon (C) 0.32 ~ 0.42 Provides strength and hardness
Chromium (Cr) 24 ~ 26 Primary oxidation resistance
Nickel (Ni) 7.2 ~ 8.0 Austenite stabilization
Silicon (Si) 1.45 ~ 2.0 Oxidation resistance enhancement
Manganese (Mn) ≤ 2.0 Deoxidation and sulfur control
Molybdenum (Mo) 0.3 ~ 0.7 High-temperature strength
Nitrogen (N) 0.20 ~ 0.28 Strength and corrosion resistance
Cerium (Ce) 0.2 ~ 0.3 Rare earth element benefits
Phosphorus (P) ≤ 0.03 Controlled impurity
Sulfur (S) ≤ 0.03 Controlled impurity
Note: The above composition is typical for 3Cr24Ni7SiNRe and may vary slightly based on specific manufacturing processes or standards.
Temperature Performance
Continuous Service Up to 1050°C (1922°F)
Intermittent Service Up to 1150°C (2102°F)
Short-term Exposure Up to 1200°C (2192°F)
Melting Point 1400-1450°C
Mechanical Properties
Tensile Strength 550-650 MPa
Yield Strength 250-350 MPa
Elongation 35-45%
Hardness 180-220 HB
Physical Properties
Density

7.9-8.1 g/cm³

Thermal Conductivity

15-18 W/m·K

Thermal Expansion

16-18 × 10⁻⁶/°C

Product Specifications

Available Forms
  • Rollers and Pipes
  • Heat Resistant Castings
  • Furnace Components
  • Custom Fabricated Parts
  • Industrial Components
Quality Standards
  • ASTM Standards Compliance
  • EN European Standards
  • JIS Japanese Standards
  • GB Chinese National Standards
  • ISO Quality Management

Industrial Applications

3Cr24Ni7SiNRe offers exceptional high-temperature strength, oxidation and corrosion resistance, making it ideal for critical components across various industries.

Aerospace Industry

Used in turbine nozzles, combustion chambers, and exhaust components requiring high heat resistance.

Power Generation

Applied in boiler tubes, superheater elements, and steam turbine housings in thermal power plants.

Chemical Processing

Ideal for reactor vessels, acid-resistant piping, and catalytic converter shells operating under extreme corrosion.

Automotive Industry

Supports extreme heat zones in exhaust manifolds and turbochargers for high-performance vehicles.

Industrial Furnaces

Long-lasting material for furnace grates, burner nozzles, and radiant tubes in metallurgical industries.

Standards-Compliant Components

Manufactured to ASTM, EN, and JIS standards for consistency and international acceptance.

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