Product Overview

Inconel 625 (domestic equivalent grades: GH625/GH3625, old national standard grade NS3306, UNS N06625, standards: AMS 5599, AMS 5666, AMS 5581, ASTM B443/B444/B446/B564, GB/T 14992) is a mainstream international solid solution strengthened nickel-based deformed superalloy in the chromium-molybdenum-niobium series, belonging to a highly versatile high-end heat and corrosion-resistant structural material.

Main Product Features

Wide temperature range and high strength, stable mechanical properties at high and low temperatures: Maintains stable tensile strength, yield strength, and impact toughness within the ultra-low temperature liquid nitrogen environment at -253℃ to the high temperature range of 815℃.

2. Wide-spectrum corrosion resistance across all media, suitable for severe operating conditions: The alloy surface can form a dense, strongly adherent, self-healing stable passivation film, with comprehensive wide-spectrum anti-corrosion capability.

3. Excellent process performance with top-notch forming and welding reliability: mature and stable cold and hot processing techniques, superior forging, rolling, stamping, bending, and deep processing capabilities, and alloy welding performance as the industry benchmark.

4. Stable microstructure and long service life at high temperatures: After standard solution heat treatment, the alloy exhibits a uniform and single-phase austenitic microstructure. Under continuous high-temperature service conditions up to 815°C, it demonstrates excellent anti-oxidation and anti-thermal erosion properties.

Product Detailed Parameters

Basic Physical Parameters: Density 8.44g/cm³, Melting Point 1290～1350℃

Standard Chemical Composition (ASTM B443): Ni≥58.0%, Cr 20.0～23.0%, Mo 8.0～10.0%, Nb+Ta 3.15～4.15%, Fe≤5.0%, Mn≤0.5%, Si≤0.5%, C≤0.10%

Solution annealed room temperature mechanical properties (ASTM B443 minimum): Tensile strength ≥827MPa, Yield strength ≥414MPa, Elongation after break ≥30%

Application Scope

High-temperature, high-pressure, strong corrosion, and alternating load severe composite working conditions in aerospace, offshore oil and gas, petrochemical industry, nuclear new energy, and high-end military industries.

Frequently Asked Questions (FAQ)

A: How is the welding performance of Inconel 625 alloy?

A: Inconel 625 alloy exhibits excellent welding properties, supporting conventional welding processes such as gas tungsten arc welding and fusion welding for similar and dissimilar steel grades. After welding, no solid solution heat treatment is required to retain the base material's strength and corrosion resistance fully.

Q: How does the Inconel 625 alloy perform at high temperatures?

A: Inconel 625 alloy exhibits excellent anti-oxidation and anti-erosion resistance under continuous high-temperature service conditions up to 815°C, with a dense and firm chromium-based oxidation protective layer formed on the surface.

A: What is the temperature range suitable for Inconel 625 alloy?

A: The long-term safe continuous service temperature of Inconel 625 alloy is -253℃ to 815℃, with the optimal stable service range ≤700℃, and the short-term ultimate耐受 temperature can reach 980℃.