GH4141 is a nickel-based alloy with added elements such as cobalt, chromium, molybdenum, aluminum, and titanium. It achieves strengthening through the precipitation of the γ′ phase (Ni₃(Al,Ti)), maintaining good microstructural stability and strength at high temperatures of 650–900°C.

1.1 Typical Chemical Composition Range (wt%)

Ni: Balance

Cr: 18.0%

Mo: 9.0%

Co: 10.0%

Al: 1.5%

Ti: 2.7%

Fe: ≤1.0%

C: ≤0.10%

B: ≤0.01%

Zr: ≤0.05%

• Note: Trace elements such as Nb, Si, and Mn may be present to fine-tune microstructure and performance.

2. Material Performance Characteristics

2.1 Mechanical Properties (Typical Values)

• Room Temp

Tensile Strength (MPa)：980–1080

Yield Strength (MPa)：780–850

Elongation (%)：15–20

Creep Strength (100h, MPa)：-

• 700°C

Tensile Strength (MPa)：850–950

Yield Strength (MPa)：700–780

Elongation (%)：12–18

Creep Strength (100h, MPa)：≥650

• 800°C

Tensile Strength (MPa)：700–850

Yield Strength (MPa)：580–680

Elongation (%)：≥10

Creep Strength (100h, MPa)：≥450

2.2 High-Temperature Creep and Durability

• GH4141 maintains stable performance for over 100 hours at 700–800°C, exhibiting low creep rates and strong microstructural stability, suitable for long-term service under extreme conditions.

2.3 Thermal Stability and Oxidation Resistance

• The alloy’s high chromium and aluminum content provides excellent high-temperature oxidation and corrosion resistance. A continuous and dense oxide film forms on the surface, allowing operation in oxidative atmospheres for over 1000 hours.

3. Processing and Heat Treatment Guidelines

3.1 Hot Working Performance

• GH4141 has good forging workability, with typical forging parameters as follows:

Heating temperature: 1120–1180°C

Final forging temperature: not less than 950°C

Cooling method: air or oil cooling to prevent grain coarsening and cracks.

3.2 Recommended Heat Treatment Regimen

• To maximize strengthening, a two-stage heat treatment is usually applied:

Solution treatment: 1110–1130°C for 2 hours, air cooling;

• Aging treatment:

Step 1: 870–880°C for 8 hours, furnace cool to 760°C;

Step 2: 760°C for 16 hours, air cooling.

This treatment maximizes γ′ precipitation, enhancing high-temperature strength and creep life.

3.3 Welding and Machining Characteristics

Welding methods: TIG (Tungsten Inert Gas) or electron beam welding;

Welding precautions: preheating and post-weld heat treatment reduce crack susceptibility;

Machining recommendations: perform in solution-treated or annealed state, use high-speed steel or carbide tools with wet cooling.

4. Domestic and International Alloy Comparisons

• Waspaloy (UNS N07001)

Source Country/Organization：USA

Performance Comparison Summary：Comparable high-temperature strength, GH4141 offers better domestic adaptability and supply security.

• Inconel 718

Source Country/Organization：USA

Performance Comparison Summary：GH4141 outperforms 718 in high-temperature creep but 718 has better weldability.

Note: GH4141 is a domestically optimized alternative to foreign high-temperature alloys, especially excelling in microstructural stability and creep resistance at high temperatures.

5. Typical Engineering Applications

• GH4141 is widely used in multiple domestic models of aero engines and gas turbine equipment, including:

High-temperature turbine discs and compressor discs

Combustion chamber casings, high-temperature flanges, and fasteners

Nuclear reactor structural parts and control components

High-temperature bolts, flow guide plates, and thermal protection system

6. Future Development and Material Advantages

With continuous upgrades in China’s aerospace and energy equipment, the demand for high-performance high-temperature alloys is increasing. GH4141, featuring excellent domestic controllability, a stable supply chain, and mature heat treatment technology, has become a key domestic substitute material in high-end equipment manufacturing.

• Summary of Technical Advantages:

Outstanding high-temperature strength and creep life;

Mature heat treatment and hot working processes;

Strong oxidation and thermal corrosion resistance;

Suitable for manufacturing complex-shaped components.

7. About Suzhou Bolaibao Metal

As a leading domestic supplier of high-temperature alloys, Suzhou Bolaibao Metal focuses on the development and application of GH4141 alloy. Leveraging extensive production experience and a comprehensive quality control system, we are dedicated to providing stable and reliable material solutions for high-end fields such as aero engines, gas turbines, and the nuclear industry. We possess full expertise in GH4141 alloy design, heat treatment processes, and manufacturing technologies, ensuring products with exceptional high-temperature strength, durability, and oxidation resistance.

• Choose Bolaibao—choose quality and innovation to safeguard your high-temperature equipment!

Contact: +86 15366282159
Email: sale@bolaibao1.com
Website: www.blbszmetal.com