Product Overview

Inconel 718, produced by Qinchuan New Materials (Zhengzhou) Co., Ltd., is a precipitation-hardened deformed high-temperature alloy widely used in industrial fields. The alloy primarily strengthens with γ'' phase and γ' phase as auxiliary, featuring excellent strength-toughness matching and microstructure stability. Inconel 718 alloy exhibits the highest yield strength below 650°C, while also possessing ultra-low temperature stability, excellent corrosion resistance, fatigue resistance, weldability, and machinability. It serves as a core high-end structural material in the fields of aerospace, nuclear power, and petrochemical industries.

Main Product Features

• Excellent high-temperature strength and structural stability: Maintains high yield strength and anti-creep properties below 650°C, long-term high-temperature service is less prone to stress relaxation, plastic deformation, and structural deterioration.
• Comprehensive corrosion and oxidation resistance: The matrix is rich in chromium and molybdenum alloy elements, demonstrating stable antioxidant, anti-sulfidation, anti-pitting, and anti-cracking corrosion resistance in severe environments such as high-temperature oxidation, sulfidation, marine salt mist, humid atmosphere, and acidic media.
• Excellent processing and welding properties: exhibits excellent plasticity in the annealed state, supports forging, rolling, stamping and other forming processes, and has good machining properties. The alloy has good welding stability and is less prone to welding cracks.
• Comprehensive performance balance across ultra-wide temperature range: Effective service temperature range covers from ultra-low -253℃ to high 700℃, with no brittle fracture at low temperatures and no abrupt degradation at high temperatures, outstanding performance in resistance to low-temperature brittle fracture, radiation, and alternating fatigue.

Product Detailed Parameters

Application Scope

The Inconel 718 alloy is widely used in the following fields:

• Aerospace: Aviation engine, gas turbine core load-bearing components, rocket engine, high-temperature load-bearing structural components for spacecraft.
• Energy Power and Nuclear Power: Steam turbines, gas turbines, high-temperature rotors and hot-end components, nuclear reactor structural parts, seals, pipeline fittings.
• Petroleum & Chemical Industry: Deep well oil extraction equipment, high-temperature and high-pressure reactors, cracking unit components, oil and gas transmission pipelines, corrosion-resistant valve fittings.
• Power Machinery: High-end diesel and gas engine high-temperature load-bearing parts, turbocharger structural components, high-temperature sealing assemblies.
• General high-end industrial: precision high-temperature molds, heat treatment fixtures, high-temperature instrument accessories, marine engineering corrosion-resistant structural parts, high-end precision high-temperature mechanical components.

Frequently Asked Questions (FAQ)

• Q: What is the optimal long-term service temperature for Inconel 718 alloy? A: The optimal long-term service temperature for Inconel 718 alloy is ≤650°C.
• Q: How is the welding performance of Inconel 718 alloy? A: Inconel 718 alloy has good welding stability, is less prone to welding cracks, and its mechanical properties can be fully restored after standard aging heat treatment.
• Q: Where is Inconel 718 alloy widely used? A: Inconel 718 alloy is widely used in aerospace, nuclear power, petrochemicals, power machinery, and general high-end industries.