Inconel 625 Forged Ring: The Superalloy for Extreme Industrial
ASTM B564 / UNS N06625 forged rings are the culmination of
materials science and manufacturing processes. Their composite
properties of "corrosion resistance + toughness + high temperature
stability" make them a "core backbone" in high-end fields such as
aerospace, energy and chemical engineering, and marine engineering.
As a nickel-chromium-molybdenum-niobium superalloy, its composition
is engineered to address the pain points of extreme environments:
Nickel (Ni ≥58%): Serves as the base element, endowing the material with excellent
ductility, corrosion resistance, and wide-temperature stability
(maintaining performance from -196℃ cryogenic conditions to 1000℃
high temperatures).
Chromium (Cr 20-23%): Forms a dense oxide film, significantly enhancing oxidation and
pitting resistance—especially outstanding in high-temperature
oxidative environments such as aero-engine combustion chambers.
Molybdenum (Mo 8-10%): Strengthens resistance to reducing acids (e.g., sulfuric acid,
phosphoric acid) and chloride-induced stress corrosion, acting as a
"corrosion protection weapon" for marine engineering and chemical
equipment.
Niobium (Nb 3.15-4.15%): Forms stable carbides with carbon, refining grain structure and
improving creep strength (resistance to deformation under long-term
high-temperature loads), ensuring long-term reliability in gas
turbines and nuclear power components.
ASTM B564 forged rings achieve performance leaps through precision forging technology:
Hot forging + ring rolling technology: Alloy ingots are heated to 1150-1200℃ and shaped by presses or
ring rolling equipment, aligning grains along the stress direction
to drastically improve strength and toughness (fatigue life can be
increased by over 30% compared to cast or ordinary rolled parts).
Solution heat treatment: Undergoes solution annealing at 980-1038℃ followed by water
quenching, ensuring uniform solid solution of alloying elements and
maximizing the synergy between corrosion resistance and mechanical
properties.
Full coverage of non-destructive testing (NDT): During production, ultrasonic testing (UT), liquid penetrant
testing (LPT), and other methods are required to ensure no internal
cracks, pores, or other defects, meeting the strict "zero-defect"
requirements of ASTM B564.
Its performance advantages are directly translated into solutions
for industrial scenarios:
Corrosion resistance: Fully resistant to corrosive media such as sulfuric acid,
hydrochloric acid, seawater, and high-temperature oxidation,
enabling maintenance-free service life of over 20 years in chemical
reactors and subsea pipelines.
Mechanical properties: Tensile strength ≥760MPa, yield strength ≥345MPa, elongation ≥30%,
combining high strength and high plasticity to withstand impact
loads (e.g., aero-engine rotor components).
High-temperature stability: Maintains excellent creep strength and oxidation resistance below
980℃, making it the preferred material for hot-end components of
gas turbines (e.g., combustion chamber liners).
Processing adaptability: Possesses good weldability and machinability, and can be
integrated into complex systems through welding, forging,
machining, etc., reducing the process difficulty of downstream
applications.
