High-strength Precision Tubes, 347HFG & S34710 Austenitic Stainless Steel Boiler Tubes for High-temperature Applications

We specialize in manufacturing high-performance seamless steel tubes and alloy steel tubes, covering a full range of materials including austenitic, ferritic, and super alloy grades. Our products are engineered for high-temperature, high-pressure, and corrosive environments, widely used in boilers, heat exchangers, and industrial superheaters, delivering reliable performance for critical industrial applications.

Core Material Specifications1. Austenitic Stainless Steel Tubes

2. Ferritic Stainless Steel Tubes

3. Super Alloy & Special Steel Tubes

Product Advantages

• Precision Dimensional Control: Adopt cold drawing and hot rolling processes, ensuring tight tolerance of outer diameter (±0.05mm) and wall thickness (±0.02mm), meeting strict assembly requirements.

• Superior Mechanical Properties: High tensile strength (≥515MPa), excellent elongation (≥40%), and good impact toughness even at low temperatures (-196℃ for 904L).

• Excellent Corrosion & High-Temperature Resistance: Resistant to oxidation, pitting, and intergranular corrosion; applicable for long-term service in high-temperature environments up to 1100℃ (310S grade).

• Smooth Surface & Inner Wall: Surface finish up to Ra≤0.8μm, inner wall free of burrs, reducing fluid resistance and preventing material accumulation.

• Dimensional Stability: Low thermal expansion coefficient, minimal deformation under temperature fluctuations, ensuring long-term operational reliability.

Application Scenarios

• Boiler & Superheater Systems: Boiler tubes and superheater tubes for power plants, suitable for high-temperature and high-pressure steam environments (321H, 347H, 310S grades).

• Heat Exchangers: Heat exchanger tubes for chemical, petrochemical, and refrigeration industries, resisting corrosive media (316L, 317L, 904L grades).

• High-Temperature Industrial Equipment: Tubes for furnaces, kilns, and thermal processing equipment (310S, 314, Super304 grades).

• Corrosive Environment Applications: Chemical pipelines, marine engineering, and offshore oil platforms (S31254, N08926, S32654 grades).

• General Industrial Fields: Fluid transportation, structural support, and mechanical parts manufacturing (304, 304L, 316L grades).

Processing & Customization Capabilities

• Size Range: Outer diameter: 6mm-219mm; Wall thickness: 0.8mm-20mm; Length: 1m-12m (customizable for special lengths).

• Processing Technologies: Hot rolling, cold drawing, bright annealing, pickling passivation, sandblasting, and precision cutting.

• Surface Treatments: Annealed, pickled, polished (2B, BA, 8K), and anti-corrosion coating (customizable based on requirements).

• Custom Services: Provide non-standard size customization, material modification, and pre-assembly processing according to customer drawings and technical specifications.

Quality Assurance

• Certifications: Product certifications conforming to ASTM, ASME, EN, and GB standards.

• Inspection Processes: Raw material inspection → In-process dimensional detection → Mechanical property testing → Corrosion resistance testing → Non-destructive testing (UT, ET, MT) → Final surface inspection.

• Quality Commitment: Strict quality control throughout the production process, providing complete inspection reports and material certificates (MTC) for each batch of products.