347 Stainless Steel Sheets

Description

1. Product Overview
   347 Stainless Steel Sheets are premium-grade austenitic stainless steel products stabilized with niobium (columbium), specifically engineered to resist intergranular corrosion and perform under elevated temperature environments. They are widely used in demanding industrial sectors such as petrochemical processing, power generation, aerospace, and heat exchanger manufacturing. The key value proposition lies in their exceptional thermal stability and long-term structural integrity under cyclic heat exposure. Strategically, 347 stainless steel is critical in applications where failure resistance, regulatory compliance, and lifecycle cost efficiency are non-negotiable.
2. Key Specifications & Technical Characteristics

• Material Grade: AISI 347 (UNS S34700) stabilized austenitic stainless steel
• Chemical Composition:
  • Chromium (Cr): 17.0–19.0%
  • Nickel (Ni): 9.0–13.0%
  • Carbon (C): ≤0.08%
  • Manganese (Mn): ≤2.0%
  • Silicon (Si): ≤0.75%
  • Niobium/Columbium (Nb + Ta): 10×C min, up to 1.0%
• Form: Sheets / Plates (hot rolled or cold rolled)
• Surface Finish: 2B, BA, No.1, polished options available
• Density: ~8.0 g/cm³
• Corrosion Resistance: Excellent resistance to intergranular corrosion after welding or high-temperature exposure
• Packaging: Export-grade seaworthy wooden pallets, waterproof wrapping, steel strapping
• Shelf Life: Not applicable (non-degradable metallic material under proper storage conditions)

3. Core Industrial Applications
   347 Stainless Steel Sheets are extensively used in industries requiring high-temperature strength and corrosion resistance. Primary applications include heat exchangers, furnace components, boiler tubing, pressure vessels, and chemical processing equipment. The material is particularly effective in environments subject to intermittent heating between 400°C–900°C, where standard stainless steels may suffer carbide precipitation and structural degradation. Compared to alternatives such as 304 or 321 grades, 347 offers superior resistance to intergranular corrosion and extended service life under thermal cycling conditions, improving operational uptime and reducing maintenance frequency.
4. Competitive Advantages

• Superior Thermal Stability: Niobium stabilization prevents carbide precipitation, ensuring structural integrity at elevated temperatures
• High Corrosion Resistance: Enhanced performance in aggressive chemical and oxidizing environments
• Weld Integrity Retention: Maintains corrosion resistance in welded structures without post-weld heat treatment in most cases
• Supply Reliability: Consistent large-volume availability for industrial-scale procurement
• Cost Efficiency Over Lifecycle: Reduced downtime and replacement frequency compared to lower-grade stainless steels
• Global Export Compliance: Meets ASTM, ASME, and ISO industrial standards
• Technical Documentation Support: Full mill test certificates (MTC), traceability, and inspection reports available

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity: Approximately 20–25 MT per 20FT container (depending on thickness and packing configuration)