AMS 5874 / Alloy 556 (UNS R30556) Sheet

International Designation Equivalents

Material Characteristics

• Multi-Corrosion Resistance: Excellent resistance to sulfidizing, carburizing, chlorine-containing gas corrosion, molten chloride salt erosion and molten zinc corrosion, adapting to complex industrial high-temperature corrosive media.
• Superior High-Temperature Strength: Maintains stable structural strength and thermal stability under long-term high-temperature operation, avoiding creep deformation and failure.
• Balanced Oxidation Resistance: Reliable anti-oxidation performance in high-temperature aerobic environments, effectively reducing surface scaling and material loss.
• Outstanding Processability: Supports flexible hot working, cold forming and various welding methods, with low processing difficulty and high finished product yield.

Fabrication & Welding Performance

1. Hot & Cold Forming

• Hot Working: Forging and hot forming can be performed stably after uniform heating at 1175°C (2150°F) to ensure consistent internal structure.
• Cold Working: Excellent room-temperature ductility allows conventional cold stamping, bending and shaping.
• Post-Processing Treatment: All hot/cold worked parts require annealing and rapid cooling to restore optimal mechanical and corrosion-resistant properties.

2. Weldability

• GTAW (Gas Tungsten Arc Welding / TIG)
• GMAW (Gas Metal Arc Welding / MIG)
• SMAW (Shielded Metal Arc Welding)
• Resistance Welding

Standard Heat Treatment Process

• Supply State: Supplied in solution heat-treated condition as standard.
• Standard Solution Annealing: 1175°C (2150°F), followed by rapid cooling or water quenching to achieve the best combination of strength, toughness and corrosion resistance.
• Note: Long-term heating below the solution temperature will cause secondary phase precipitation, reducing material ductility and corrosion performance.

Applications 1. Waste Treatment & Mineral Processing Industry Structural tubes and components for municipal & industrial waste incinerators Rotary calciners, mineral processing kilns and carbon regenerator parts 2. Power & Gas Turbine Industry Non-rotating structural components for industrial gas turbines burning low-grade fuel Diesel engine air preheater high-temperature accessories 3. Chemical & Petroleum Industry High-sulfur petroleum feedstock processing equipment High-temperature corrosive medium reaction and transmission components 4. Metallurgical & Aerospace Industry Hot-dip galvanizing fixtures, spinner discs and hanging baskets High-speed furnace fan blades and high-temperature furnace inner cover parts Custom high-temperature structural components for aerospace thermal systems

ZYTC Alloy Supply Advantages

• Standard Compliance: All AMS 5874 Alloy 556 products strictly follow aerospace specification requirements, with standardized solution annealing treatment.
• Stable Performance: Precise composition control ensures excellent resistance to high-temperature oxidation, sulfidation and molten salt corrosion for each batch.
• Diversified Sizes: Supply sheet, strip and plate with customizable thickness and width, supporting prototype trial orders and mass industrial procurement.
• Full Quality Certification: Complete MTR test reports, chemical analysis and mechanical performance data are provided for every shipment to support global project qualification.