AMS 5771 / UNS N10003 / Alloy N Bar

ZYTC Alloy supplies AMS 5771 Hastelloy N (UNS N10003) nickel alloy bars, forgings and rings, solution heat treated for hot fluoride salt corrosion resistance. Custom machining & MTC available.

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ZYTC Alloy, a reliable Chinese nickel alloy manufacturer and exporter, supplies AMS 5771 Hastelloy® N (UNS N10003) solution heat treated bars, forgings, rings, and forging stock to global customers for high-temperature corrosion-resistant projects.

Hastelloy® N (Alloy N / UNS N10003) is a 74Ni-7.0Cr-16.5Mo nickel alloy specified under AMS 5771, engineered for outstanding resistance against oxidation in hot fluoride salt environments. It delivers stable performance within 1300–1600°F (704–871°C). The alloy supports continuous service up to 1800°F (982°C), and intermittent operation at temperatures as high as 1900°F (1038°C). Virtually no oxidation occurs at temperatures below 1200°F (649°C), making it ideal for extreme thermal and corrosive service conditions.

Chemical Composition

Element	Content (%)
Nickel, Ni	71
Molybdenum, Mo	16
Chromium, Cr	7
Iron, Fe	≤ 5
Silicon, Si	≤ 1
Manganese, Mn	≤ 0.80
Tungsten, W	≤ 0.50
Aluminum, Al + Titanium, Ti	≤ 0.50
Copper, Cu	≤ 0.35
Cobalt, Co	≤ 0.20
Carbon, C	≤ 0.080

Physical Properties

Properties	Metric	Imperial
Density	8.86 g/cm³	0.320 lb/in³
Melting point	1372°C	2500°F

Mechanical Properties

Properties	Metric	Imperial
Tensile strength	800 MPa	116000 psi
Elongation at break (in 25.4 mm)	39.3%	39.3%
Modulus of elasticity (@14°C)	219 GPa	31800 ksi

Equivalent Standards

Hastelloy® N (Alloy N / UNS N10003) matches multiple international specifications:

AMS 5607, AMS 5771
ASTM B366, ASTM B434, ASTM B573

Fabrication & Heat Treatment Properties

MachinabilityHastelloy® N can be machined with conventional methods applied to ferrous alloys. Commercial coolants are required for general machining. Water-based coolants are recommended for high-speed processes including grinding, milling and turning. Heavy lubricants are essential for tapping, drilling, boring and broaching operations.

Forming & Welding This alloy is formable via standard metal forming techniques. Suitable welding processes include GTAW, GMAW and SMAW. Submerged arc welding is not recommended for Hastelloy® N.

Heat Treatment & Cold Working Hastelloy® N cannot be hardened by thermal treatment; hardening is achieved solely through cold working. Soft die materials like zinc alloy and bronze are adopted in cold forming to achieve smooth surface finish and avoid galling. Intermediate annealing can be arranged during cold forming cycles. Annealing is carried out at 1177°C (2150°F), followed by controlled cooling.

Applications

Hastelloy® N is widely selected for chemical processing equipment and general industrial components that demand superior high-temperature oxidation resistance.

ZYTC Alloy provides custom sizes, cutting, forging and machining services for Hastelloy® N bars, rings and forgings. All products comply with AMS 5771 and related ASTM standards. Contact our team for material test certificates and quotation.

Contact ZYTC Alloy Today

📧Email:daisy@zytcsteel.com
📲WhatsApp: +86 17335753350