INCONEL® 625 Alloy

  • N06625
  • 2.4856

Key properties

(in annealed condition)
Tensile strength: 120.00–140.00
Yield strength: 60.00–75.00
Elongation: 55.00–30.00%
Hardness: 145.00–220.00

Composition

Ni

58.00% min

Cr

20.00-23.00%

Mo

8.00-10.00%

Fe

5.00% max

Nb+Ta

3.15-4.15%

Co

1.00% max

Si

0.50% max

Mn

0.50% max

Ti

0.40% max

Ag

0.40% max

C

0.10% max

S

0.01% max

P

0.01% max

INCONEL® 625 alloy is used for its high strength, excellent fabricability (including joining), and outstanding corrosion resistance. It has become a standard material of construction in a wide variety of industrial applications, which is unusual for an alloy. Alloy 625 is valuable in that it is versatile and able to solve a wide variety of design and application problems.

INCONEL® 625 alloy consists of a solid solution alloy of nickel, chromium and molybdenum alloy with niobium added. When this combines with molybdenum it distorts the alloy’s atomic matrix, thus providing particularly high strength in the annealed condition without a deliberate strengthening heat treatment.This combination of elements creates superior resistance to a wide range of corrosive environments of unusual severity.

Alloy 625 is generally supplied in the annealed condition, to provide utmost stability during fabrication and subsequent service. INCONEL® 625 alloy has found to have a resistance to potable and salt or brackish water, where Chloride ions cause pitting and crevice corrosion to become established. As a result, pipelines for gathering sour gas have been built with solid (or clad)  INCONEL® 625 alloy and used in

seawater heat exchangers in refineries, power plants, and offshore topside services that often need this material.

Additionally, the alloy's properties make it an excellent choice for sea-water applications, including freedom from local attack (pitting and crevice corrosion), high corrosion-fatigue strength, high tensile strength, and resistance to chloride-ion stress-corrosion cracking.

The outstanding and versatile corrosion resistance of INCONEL 625 alloy under a wide range of temperatures and pressures is a primary reason for its wide acceptance in the chemical processing field. Because of its ease of fabrication, it is made into a variety of components for plant equipment.

INCONEL® 625 alloy is also used extensively in the aerospace, automobile, oil extraction, oil refining, marine, waste treatment, pulp & paper and power industries. Recent developments have led to INCONEL® 625 alloy being used as weld overlaid or co-extruded product for superheater tubing and is playing  a major role in the worldwide growth of Municipal Waste To Energy and bio fuel production.

Welding consumables

Welding electrodes: INCONEL 112
Fillers: INCONEL filler metal 625, INCOLOY 82