Introduction

GH2901 Superalloy (GH901 / Incoloy 901 / N09901 / 2.4662) is a Fe-Ni-Cr based precipitation-hardening wrought superalloy that achieves its exceptional strength through γ′ [Ni₃(Ti,Al)] precipitation during controlled aging heat treatment. The alloy contains approximately 40–45% nickel, 11–14% chromium, 5.0–6.5% molybdenum, 2.8–3.1% titanium, and aluminum (≤0.35%), with boron additions (0.01–0.02%) for grain boundary strengthening. This GH2901 nickel base superalloy delivers high yield strength and endurance strength below 650°C (1200°F), good oxidation resistance below 760°C (1400°F), and long-term microstructural stability. Its high temperature nickel alloy characteristics—combined with cost advantages over higher-alloyed nickel-based superalloys—make it the preferred material for aero-engine turbine discs, compressor discs, gas turbine components, high-temperature fasteners, industrial furnace equipment, and petrochemical industry applications. Available in a full range of product forms including GH2901 round bar, plate, sheet, pipe, tube, wire, and forgings.

Chemical components （%）

Mechanical properties

Physical properties

GH2901 Superalloy Available Products and Standard

1. GB/T 14992 (Superalloys – Classification and Specifications)

Grade: GH2901 / GH901

Type: Round Bar / Sheet / Plate / Strip / Wire / Forgings

Size Range:

• GH2901 Wire: 0.1 – 15.0 mm dia

• GH2901 Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide

• GH2901 Round Bar: 8 – 355 mm dia

• GH2901 Sheet / Plate: 0.5 – 180 mm thick

Surface: Annealed, Bright, Pickled, Ground

Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, high-temperature stress rupture test, age hardening response test, dimensional inspection

2. ASTM B408 (Standard Specification for Nickel-Iron-Chromium Alloy Rod and Bar)

Grade: UNS N09901 / GH2901 / GH901 / Incoloy 901

Type: Round Bar / Rod / Wire

Size Range:

• GH2901 Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)

• GH2901 Wire: 0.1 – 15.0 mm dia (coils or straight)

Surface: Annealed, Pickled, Ground, Turned, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, age hardening test, ultrasonic test, dimensional inspection

3. AMS 5660 (Standard Specification for Nickel Alloy Bar, Wire, and Forgings)

Grade: UNS N09901 / Incoloy 901 / GH2901

Type: Round Bar / Wire / Forging

Size Range:

• GH2901 Round Bar: 8 – 355 mm dia

• GH2901 Wire: 0.1 – 15.0 mm dia

• GH2901 Forging: Custom sizes available

Surface: Annealed, Pickled, Ground, Turned, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, age hardening response test, stress rupture test, ultrasonic test, dimensional inspection

Applications

1. Aerospace & Aero-Engine Components

• For turbine discs and compressor discs operating below 650°C (1200°F), GH2901 round bar provides high yield strength (≥850 MPa) and creep resistance where other alloys would soften and deform under sustained thermal and mechanical loads.

• For high-temperature fasteners (bolts, nuts, studs) in aircraft engines and airframe assemblies, GH2901 superalloy maintains clamping force and structural integrity through thousands of thermal cycles from ambient to elevated temperatures.

• For compressor casings, bearing housings, and turbine outer rings requiring dimensional stability under load, GH2901 forged bar delivers excellent resistance to thermal fatigue and relaxation.

• For seals, rings, and hot-section hardware in aero-engines, GH2901 sheet and plate offer good formability combined with long-term thermal stability.

2. Gas Turbines & Power Generation

• For industrial gas turbine compressor discs and turbine wheels, GH2901 bar provides the combination of high-temperature strength and cost-effectiveness that makes it a practical alternative to higher-alloyed nickel-based superalloys.

• For power generation equipment requiring reliable performance in high-temperature oxidizing environments, GH2901 plate offers oxidation resistance up to 760°C (1400°F) with stable mechanical properties through extended service intervals.

• For boiler supports, turbine casing fasteners, and structural components in thermal power plants, GH2901 alloy delivers the durability required for demanding energy applications.

3. Petrochemical Industry & Chemical Processing

• For high-temperature reactors, heat exchangers, and process piping handling corrosive hydrocarbon streams, GH2901 pipe and tube resist oxidation and maintain mechanical integrity at elevated temperatures.

• For valve stems, pump shafts, and high-temperature fasteners in refinery and petrochemical equipment, GH2901 round bar offers corrosion resistance combined with high-temperature strength.

• For furnace components and heat treatment fixtures, GH2901 plate and sheet withstand repeated thermal cycling without significant degradation.

4. Nuclear Industry & Marine Engineering

• For nuclear reactor structural components and fasteners requiring resistance to high-temperature water corrosion and radiation stability, GH2901 superalloy provides reliable performance in demanding nuclear environments.

• For marine engineering applications including deep-sea equipment and offshore structural components, GH2901 alloy offers corrosion resistance in seawater environments combined with high-temperature stability.

• For high-temperature springs and precision mechanical components, GH2901 wire delivers the elastic properties and thermal stability required for critical service.

FAQ – GH2901 Superalloy

Q: What is the equivalent material for GH2901?

A: GH2901 corresponds to Incoloy 901 (commercial name), UNS N09901, AMS 5660/5661, W.Nr. 2.4975, and Nimonic 901 internationally. It is also known as GH901 in some Chinese standards and is sometimes incorrectly referenced with other UNS designations.

Q: What is the maximum operating temperature for GH2901?

A: GH2901 is suitable for continuous service up to 650°C (1200°F) with high yield strength and creep resistance. It offers good oxidation resistance up to 760°C (1400°F). The alloy maintains long-term microstructural stability at operating temperatures. For service above 760°C, other superalloys such as Inconel 718 or GH4169 are recommended.

Q: What is the difference between GH2901 and Inconel 718?

A: GH2901 is a Fe-Ni-Cr based alloy with approximately 40–45% nickel content and lower overall alloying, offering a cost-effective solution for applications up to 650°C. Inconel 718 has higher nickel (50–55%) and niobium content, providing higher tensile strength (up to 1200 MPa) and better weldability for complex fabricated structures. GH2901 delivers a high-performance-to-cost ratio, while Inconel 718 is selected for applications requiring extreme strength and higher temperature capability above 650°C.

Q: What are the typical applications for GH2901?

A: Aerospace (turbine discs, compressor discs, high-temperature fasteners, casings, seals); gas turbines and power generation (compressor wheels, turbine components, boiler hardware); petrochemical industry (reactors, heat exchangers, valve stems, pump shafts, furnace components); nuclear industry (structural components, fasteners); and marine engineering (deep-sea equipment, offshore structural components).

We are a trusted GH2901 Supplier and GH2901 Manufacturer, China‑based, serving aerospace manufacturers, gas turbine builders, petrochemical equipment fabricators, and power generation contractors worldwide. All products comply with GB/T 14992 / GB/T 14995 with full mill test certificates, PMI verification, and dimensional inspection reports. We offer GH2901 round bar, plate, sheet, pipe, tube, wire, welding wire, forgings, flanges, and fasteners in custom sizes, with cut‑to‑length, precision machining, forging, and heat treatment services. Hot rolled, cold rolled, bright drawn, and precision ground options available. Contact us at info@monokj.com for size chart, pricing, or custom requirements.