AMS 5893 / UNS N19909 Alloy 909 Bars

AMS 5893 Incoloy 909 (UNS N19909) is a low-expansion, high-strength nickel-cobalt-iron alloy with 7.7 µm/m·°C CTE and 185 ksi tensile strength. Ideal for gas turbine casings, shrouds, vanes, gauge blocks, and steam-turbine bolts. ZYTC Alloy is AS9120B and ISO 9001 certified.

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AMS 5893 Incoloy 909 (UNS N19909) Low‑Expansion Nickel‑Iron‑Cobalt Alloy Bars | ZYTC Alloy

ZYTC Alloy is a professional Chinese manufacturer and exporter of aerospace‑grade nickel‑based superalloys. We supply premium AMS 5893 Incoloy 909 (UNS N19909) bars, forgings and rings for global aero‑engine, gas turbine, rocket propulsion and precision‑instrument projects. Incoloy 909 is a precipitation‑hardened nickel‑iron‑cobalt alloy, distinguished by its ultra‑stable low coefficient of thermal expansion and nearly constant elastic modulus over a broad temperature range.

Manufactured in compliance with SAE AMS 5893 specifications, this alloy delivers outstanding mechanical strength and maintains precise dimensional accuracy under thermal cycling conditions. When adopted for aero‑engine parts and rocket thrust chambers, it effectively improves strength‑to‑weight ratio and achieves weight reduction. Its controlled low‑expansion performance guarantees tight component clearances and tolerances, helping equipment realize higher power output and better fuel efficiency. The alloy can operate stably at temperatures up to 1200 °F (649 °C).

Incoloy 909 is governed by three major aerospace AMS specifications: AMS 5884 for bars, forgings and rings; AMS 5892 for sheets and strips; AMS 5893 for bars, forgings and rings. Recommended hot‑working temperature range is 1800 °F (982 °C)‑1900 °F (1038 °C). Air cooling is required after hot working instead of water quenching to preserve target mechanical properties.

Advantages

Low and stable thermal expansion coefficient for high‑precision assembly components
Nearly constant elastic modulus across wide temperature ranges
High strength after precipitation hardening, suitable for heavy‑load structural parts
Excellent dimensional stability for gauge blocks and metrology components
Compatible with glass‑to‑metal sealing, resistant to thermal‑cycle impact

Chemical Composition
Weight%	N	Co	Nb	Ti	Fe	Si	Al	C
Alloy 909	35.0 - 40.0	12.0 - 16.0	4.3 - 5.2	1.3 - 1.8	Bal	0.25 - 0.50	0.15 max	0.06 max

Typical Mechanical Properties

Material	Temperature		Yield Strength (0.2% Offset)		Tensile Strength		Elongation (%)	Reduction Area %
Material	Temperature		Ksi	MPa	Ksi	MPa	Elongation (%)	Reduction Area %
Alloy 909	70F	20C	150	1034	185	1276	15	30
Alloy 909	1200	650	125	862	150	1034	25	60
Typical Tensile Properties of Age-Hardened Alloy 909

Values represent typical properties under standard heat‑treated condition. Actual data shall refer to material test report.

Maximum service temperature: 1200 °F (649 °C)
High strength achieved via precipitation hardening with good dimensional stability against thermal cycling
Hot working temperature range: 982℃‑1038℃, cooling method: air cooling

Application Fields

Aerospace gas turbine components
Rocket engine thrust chamber assemblies
Ordnance hardware parts
High‑performance springs and steam turbine bolts
Gauge blocks and precision instrumentation assemblies
Glass‑to‑metal sealing structures

Available Product Forms & Price Note

ZYTC Alloy provides Incoloy 909 (UNS N19909) in round bar, flat bar, sheet, strip, forging and billet forms. All products meet AMS 5884, AMS 5892 and AMS 5893 requirements. Complete material traceability and inspection documents are available to satisfy aerospace project acceptance standards.

Prices are subject to product dimension, purchase quantity, heat‑treatment state, NDT requirements and delivery schedule. No public fixed quotation. Please contact our sales team for real‑time stock information and customized quotation.

Relevant Specifications

UNS N19909
AMS 5884: Bars, Forgings, Rings
AMS 5892: Sheet, Strip
AMS 5893: Bars, Forgings, Rings
Incoloy 909® (trademark grade)

Why Choose ZYTC Alloy for AMS 5893 Incoloy 909?

ZYTC Alloy is a leading AS9120B and ISO 9001 certified nickel alloy supplier and manufacturer based in China, with decades of experience in the specialty metals industry serving global aerospace, defense, power generation, and precision engineering clients.

Our Advantages:

✅ AS9120B & ISO 9001 certified – rigorous quality management
✅ AMS 5893, AMS 5884, and AMS 5892 compliant materials
✅ Full material traceability from melt to delivery
✅ EN 10204 3.1 / 3.2 inspection certificates available
✅ Multiple product forms: round bar, flat bar, forgings, rings, sheet, strip, and billet
✅ Custom processing: precision cutting, forging, and heat treatment services
✅ Competitive factory pricing with no intermediaries
✅ Fast global delivery from ex-stock inventory
✅ Technical support from experienced metallurgists