347H Stainless Steel Coil for High-Temperature & Pressure Applications

347H Stainless Steel Coil

High-temperature stainless steel with enhanced creep resistance. 347H stainless steel is a niobium-stabilized austenitic chromium-nickel stainless steel developed for service at elevated temperatures. Compared with standard 347, the higher carbon content of 347H improves creep strength and stress rupture resistance, making it suitable for high-temperature and high-pressure environments.

Quick Overview

Why Choose 347H Stainless Steel

• Niobium stabilization: prevents chromium carbide precipitation during high-temperature service.
• Enhanced creep strength: higher carbon improves long-term strength at elevated temperatures.
• Excellent oxidation resistance: suitable for oxidizing environments at high temperatures.
• Good weldability: ideal for welded pressure components and piping systems.

Material Considerations

347H stainless steel is specifically designed for high-temperature and high-pressure applications. Compared with 347L, 347H provides superior creep resistance but is less suitable for low-temperature corrosion-critical environments. Material selection should consider service temperature, pressure, and design life.

Why Choose Voyage Metal

• High-temperature alloy expertise: proven supply for power, energy, and petrochemical projects.
• Consistent quality: strict control of chemistry, thickness, and flatness.
• Full traceability: heat numbers with EN 10204 3.1 mill test certificates.
• Processing services: slitting, cut-to-length, and customized packaging available.

Available Dimensions

Surface Finish Options

• 2B (cold rolled, matte)
• BA (bright annealed)
• No.1 (hot rolled, annealed & pickled)
• No.4 (brushed, limited decorative use)

Processing Services

• Slitting into narrow coils
• Cut-to-length sheets
• Edge trimming and deburring
• PVC protective film (optional)

Inspection & Documentation

• Chemical composition analysis
• Mechanical property & creep-related testing
• Surface & dimensional inspection
• Mill Test Certificate: EN 10204 3.1

Typical Applications

• Power generation boilers and superheaters
• Petrochemical and refinery piping systems
• Heat exchangers and pressure vessels
• High-temperature process equipment
• Welded components operating under sustained heat and pressure

Packaging & Shipping

• Standard export seaworthy packing
• Steel strapping with protective wrapping
• Shipping: containerized sea freight
• Trade terms: EXW, FOB, CFR, CIF, DDP

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