Haynes 556 Alloy for Gas turbines Combustion Chamber Components

2024-11-21

Haynes 556 Alloy: High-Performance Alloy for Extreme Temperature and Corrosion Resistance. At Lork Group, we are proud to offer Alloy 556, a high-performance nickel-based alloy designed for superior resistance to oxidation, corrosion, and thermal fatigue at high temperatures. With its excellent combination of strength, thermal stability, and resistance to chemical attack, widely used in the aerospace, power generation, and chemical processing industries.

Key Features of Haynes 556 Alloy

Outstanding High-Temperature Strength:Retains high tensile strength and resistance to creep deformation even at temperatures exceeding 1,200°F (650°C), making it ideal for high-temperature applications.
Superior Corrosion Resistance: Excellent resistance to both oxidation and carburization, even in environments with elevated levels of sulfur and chlorine.
Exceptional Fabricability: The alloy is easy to weld and fabricate, allowing it to be used in a variety of complex applications.
Thermal Fatigue Resistance: Outstanding performance in applications subject to thermal cycling and varying thermal conditions.

Standards for Haynes 556 Alloy

AMS 5759: Aerospace Material Specification for Haynes 556.
ASTM B575: Specification for corrosion-resistant alloys for high-temperature service.
UNS N06056: Universal Numbering System designation.

Applications of Haynes 556 Alloy

Haynes 556 is designed for applications that require high-temperature performance, corrosion resistance, and durability:

Aerospace: Turbine blades, combustion chambers, exhaust components, and seals.
Power Generation: Gas turbines, superheaters, and other high-temperature components.
Chemical Processing: Components exposed to corrosive gases and high-temperature environments.
Industrial Furnace Parts: Heat exchangers, furnace components, and process equipment.

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

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

Machinability

Can be machined using conventional techniques employed for iron based alloys. High speed operations like milling, grinding or turning can be performed using water-base coolants. Heavy lubricants are recommended for operations such as boring, broaching, tapping or drilling.

Forming

Can be formed by conventional means. For cold forming this alloy, heavy-duty lubricants can be used.

Welding

Performed through commonly used welding techniques like gas tungsten arc welding, shielded metal-arc welding, metal-arc welding and submerged-arc welding. However, an alloy filler metal that suits this alloy should be used.

Forging

Can be forged at temperatures ranging from 927 to 1177°C (1700 to 2150°F).

Cold Working

Can be cold worked using standard tooling methods. As plain carbon steels has an ability to produce galling, they are not preferred for forming this alloy. Galling can be minimized with the help of soft die materials.

Annealing

Can be annealed at 1177°C (2150°F) followed by rapid cooling of air and water quenching.

Lork Group offer top-quality Haynes 556 alloy that meets the highest industry standards. With our expertise in providing high-performance alloys, we ensure that every product we supply is manufactured for durability, precision, and optimal performance in demanding environments.

Reactor Grades of Zirconium Alloys

AMS 5754 standard Hastelloy X Bars and Forgings Application Industry