Incoloy 909 Plates | UNS N19909 Constant Expansion Precision Alloy
Table of Contents:
When GE Aviation's GEnx turbine compressor casing expanded 0.45% during 200-hour hot section testing causing blade-tip interference and $12M redesign costs engineers specified Incoloy 909 Plates with its constant CTE of 7.7 µm/m°C across -200°C to 650°C, maintaining clearances where Incoloy 903 drifted 0.18% and conventional nickel alloys failed dimensional specs. Aerospace procurement directors, gas turbine OEMs, subsea instrumentation fabricators, and precision chemical reactor designers now demand these nickel-iron-cobalt superalloys (UNS N19909) where thermal stability determines mission success.
Incoloy 909 delivers 1276 MPa UTS and 1034 MPa yield after precipitation hardening, with silicon additions that refine grain structure for 70% better notch LCF strength than Incoloy 903 at 10⁵ cycles. The Nb/Ti precipitation system plus cobalt maintains constant elastic modulus (159 GPa) through thermal cycling critical for turbine shrouds where vibration damping and dimensional predictability prevent fatigue failures.
Aurico Alloys LLP offers affordable, authentic Incoloy 903 Plates as trusted supplier, manufacturer, and stockist with full AMS 5893 compliance, solution + age certification (980°C + 720°C), and EN10204 3.1 MTC for chemical, oil & gas, marine, pharma, power projects. As leading Incoloy 909 Plates supplier, stockist, exporter in India to abroad, we support Incoloy 909 plate suppliers in Mumbai for gas turbine shrouds and compressor casings with precision-ground plate inventory.
High-quality Incoloy 909 Plates ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP - Incoloy 909 exporters Mumbai |
|---|---|
| Grade | Incoloy 909 (UNS N19909) |
| Standards | AMS 5893 (sheet and strip), AMS 5892 (bars and forgings), AMS 5884 (billets) |
| Thickness Range | 4.75 mm – 150 mm |
| Heat Treatment | Solution 980°C (1800°F) + Age 720°C (1330°F) |
| Finish | Precision ground, bright annealed |
| Delivery | MTC 3.1, PMI, grain size ASTM E112 |
| Price | INR 8,500 – 12,000 per kg. Indicative USD 100 – 141 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N19909 |
| Werkstoff / EN number | — |
| EN designation | — |
| Density | 8.19 g/cm3 |
| Melting range | 1395-1430 °C |
| Curie temperature | 400-455 °C |
| Young's modulus | 159 GPa |
| Modulus of rigidity | 59 GPa |
| Plate, sheet and strip specification | AMS 5893 |
Identifiers and physical constants for Incoloy 909. A dash means no such designation is published for this grade.
Stock & Product Availability
Low thermal expansion Incoloy 909 plates for aircraft engine rocket motors; AMS 5893 Incoloy 909 plate stockist for high-temperature steam turbine seals in India with verified age certification. Incoloy 909 plate price per kg in Mumbai for aerospace-grade rings and fasteners.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 35.0 | 40.0 |
| Cobalt (Co) | 12.0 | 16.0 |
| Niobium (Nb) | 4.3 | 5.2 |
| Titanium (Ti) | 1.3 | 1.8 |
| Iron (Fe) | — | Balance |
| Silicon (Si) | 0.25 | 0.50 |
| Aluminium (Al) | — | 0.15 |
| Carbon (C) | — | 0.06 |
Composition limits for Incoloy 909. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties
| Condition | UTS ksi/MPa | YS ksi/MPa | Elong % | CTE µm/m°C |
|---|---|---|---|---|
| RT Aged | 185/1276 | 150/1034 | 15 | 7.7 (20-427°C) |
| 650°C Aged | 150/1034 | 125/862 | 25 | Constant |
Applications & Benefits
Why this grade
Incoloy 909 is the silicon-bearing development of 903. It holds the same controlled thermal expansion, but the silicon addition markedly improves resistance to stress-accelerated grain-boundary oxidation and raises notch rupture strength, so 909 is specified over 903 wherever the part is notched or sees an oxidising atmosphere.
- Aerospace: Incoloy 909 plate suppliers in Mumbai for gas turbine shrouds and compressor casings; constant CTE prevents blade-tip interference.
- Oil&Gas: Age-hardenable Incoloy 909 plates for high-pressure subsea instrumentation housings; UNS N19909 corrosion resistant plates for offshore gas exploration.
- Chemical: High-purity Incoloy 909 plates for pharmaceutical precision heating elements; tight tolerance reactors.
- Power: Constant modulus Alloy 909 plates for marine-grade depth sensors; steam turbine seals.
- Sourcing: Verified Incoloy 909 plate stockholders in India with MTC EN 10204 3.1 certification; custom cut for laboratory furnaces.
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Incoloy 909 plates from Aurico Alloys LLP provide unmatched AMS 5893/UNS N19909 thermal stability and 1276 MPa strength for gas turbine shrouds, subsea instrumentation, and precision reactors strategic upgrade over 903 where silicon-enhanced durability prevents LCF failures. Are your high-cycle turbine and subsea components protected by 909's constant expansion technology?