AMS 5877 Alloy 556 UNS R30556 Solution Heat Treated Bar

AMS 5877 Alloy 556 (UNS R30556) solution heat treated bars, forgings & flash welded rings from ZYTC Alloy. Iron-nickel-chromium-cobalt alloy with superb resistance to sulfidation, carburization, chlorine & molten zinc corrosion. Meet AMS, ASTM & ASME standards for furnaces, incinerators, petrochemical and gas turbine projects. Get MTR reports & custom sizes.

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AMS 5877 is an industry-leading aerospace specification dedicated to heat and corrosion-resistant Alloy 556 semi-finished products, including solution heat-treated bars, forgings, flash-welded rings, and various forging/heading stock. Corresponding to UNS R30556, Alloy 556 is a premium iron-nickel-chromium-cobalt multi-alloy engineered for extreme high-temperature service and complex corrosive environments.

This material integrates outstanding high-temperature strength, excellent oxidation resistance, and unique resistance to sulfidation, carburization, and chlorine-rich corrosion. It also delivers reliable protection against molten chloride salts, general molten salts, and molten zinc erosion. Paired with superior fabricability and weldability, Alloy 556 bar and forging stock is widely adopted for industrial high-temperature structural components that require both mechanical stability and multi-corrosion resistance.

As a professional Chinese supplier of high-temperature corrosion-resistant alloys, ZYTC Alloy provides fully AMS 5877 compliant Alloy 556 bars, forgings and ring blanks. All products are supplied in standard solution heat-treated condition to stabilize microstructure and optimize comprehensive mechanical and anti-corrosion performance, serving global industrial furnace, chemical processing, waste treatment and energy equipment manufacturers.

Full Cross Reference Specifications & Standards

Alloy 556 (UNS R30556) supports a complete system of aerospace and industrial standards, covering flat products, tubular products, bars, wires and forgings for diversified engineering applications:

AMS 5877: Core specification for bars, forgings, flash-welded rings and forging stock
AMS 5874: Specification for sheet, plate and strip
AMS 5831: Specification for Alloy 556 wire
ASTM B435: Standard for sheet and plate products
ASTM B622: Standard for seamless pipe and tube
ASTM B626: Standard for welded tubing
ASME Code Case No.2010 Sec.1: Approved for sheet, plate, bar, pipe and tube pressure-bearing applications

Chemical Composition

Elements	Content (%)
Iron, Fe	31
Chromium, Cr	22
Nickel, Ni	20
Cobalt, Co	18
Molybdenum, Mo	3
Tungsten, W	2.5
Manganese, Mn	1
Tantalum, Ta	0.6
Silicon, Si	0.4
Nitrogen, N	0.2
Aluminum, Al	0.2
Carbon, C	0.1
Lanthanum, La	0.02
Zirconium, Zr	0.02

Mechanical Properties

The mechanical properties of super alloy HAYNES(r) 556 alloy™ are displayed in the following table.

Properties	Metric	Imperial
Tensile strength	815 MPa	118000 psi
Yield strength	410 MPa	59500 psi
Charpy impact	240 J	177 ft.lb
Elongation at break	47.70%	47.70%
Elastic modulus	205 GPa	29700 ksi

Heat Treatment

Solution Heat Treatment: 1175°C (2150°F) followed by rapid cooling or water quenching.
Lower-Temperature Exposure: Heat treatments below the solution temperature may cause precipitation of secondary phases; avoid unless specifically required.
Post-Working Treatment: All hot- or cold-worked parts should be annealed and rapidly cooled to restore the best balance of properties.

Applications

AMS 5877 Alloy 556 bar and forging stock are widely used for high-temperature and corrosion-resistant structural components in harsh industrial environments:

Waste & Environmental Treatment: Structural bars and forged parts for municipal and industrial waste incinerators and high-temperature flue gas processing equipment.
Mineral & Thermal Processing: Rotary calciner components, kiln structural parts and high-temperature furnace load-bearing fittings.
Petrochemical Industry: Structural parts for high-sulfur raw material processing, carburizing equipment and chlorine-containing medium reaction devices.
Power & Gas Turbine Systems: Non-rotating high-temperature structural components for industrial gas turbines burning low-grade fuels.
Metallurgical Hot-Dip Processing: Forged fixtures, hanging baskets and spinner parts for hot-dip galvanizing production lines with molten zinc corrosion resistance requirements.

ZYTC Alloy Supply Strength

Strict AMS 5877 Compliance: ZYTC Alloy’s Alloy 556 bars and forgings are strictly produced and solution heat treated in accordance with aerospace specifications, with uniform grain structure and stable performance.
Full Standard Coverage: We support all matching ASTM, AMS and ASME code standards, fully meeting the qualification requirements of international engineering projects.
Custom Processing Service: Provide customized diameter bars, precision forgings and flash-welded rings, supporting finished machining and heat treatment customization.
Complete Quality Certification: Every batch is equipped with official MTR reports, chemical composition analysis and mechanical performance test data to ensure full quality traceability.

AMS 5877 UNS R30556 Alloy 556 is a versatile high-temperature and multi-corrosion resistant alloy bar and forging material. Its unique resistance to sulfidation, carburization, chlorine corrosion and molten metal erosion, combined with excellent high-temperature strength and processability, makes it an irreplaceable material for harsh industrial thermal equipment. For high-quality AMS 5877 Alloy 556 solution heat-treated bars and forgings, ZYTC Alloy provides standardized, stable and reliable long-term supply solutions.

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