Alloy Steel GH4169 Plate is a high-performance nickel-based superalloy plate, corresponding to the domestic grade of Inconel® 718. It is widely recognized for its exceptional comprehensive properties, making it a critical material in high-tech fields. Below is a detailed overview of its key characteristics, processing, and applications:

1. Core Properties

(1) Mechanical Properties

High-Temperature Strength: Maintains excellent tensile strength and creep resistance at temperatures up to 650–700°C. For example, the room-temperature tensile strength exceeds 1300 MPa, and at 650°C, it remains above 1000 MPa, ensuring stability under long-term high-temperature loads (e.g., turbine disks, combustion chamber components).

Fatigue Resistance: Exhibits superior low-cycle and high-cycle fatigue performance, crucial for components subjected to repeated mechanical stress (such as aircraft engine shafts).

Ductility and Toughness: Good elongation (≥12% at room temperature) and impact toughness, allowing for forming processes like bending and forging without cracking.

(2) Corrosion and Oxidation Resistance

Resists corrosion from seawater, industrial gases (e.g., sulfur dioxide), and various chemical media (acids, alkalis) due to its high chromium content.

Maintains stable oxidation resistance at 800–900°C, forming a dense chromium oxide film to prevent further oxidation.

 

 

 

 

 

(3) Physical Properties

Density: Approximately 8.2 g/cm³ (slightly higher than GH2132 due to more nickel and niobium).

Melting Point: 1260–1320°C.

Thermal Conductivity: ~11.4 W/(m·K) at 20°C, increasing with temperature (e.g., ~18.8 W/(m·K) at 650°C).

Linear Expansion Coefficient: 11.8×10⁻⁶/°C (20–100°C), ensuring dimensional stability under thermal cycling.

 

 

 

 

 

 

 

 

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