General Description

Inconel 625, a nickel-chromium-molybdenum alloy contains 9% Moly, serves effectively as both a corrosion resistant and heat resistant material. The combination of high-temperature strength and resistance to halogen attack, oxidation, and carburization has made alloy 625 a popular choice for chemical and petrochemical process equipment exposed to hostile, hightemperature environments.

The high alloy content of Inconel 625 enables it to withstand a wide variety of corrosive environments. The alloy is almost completely resistant to mild environments such as the atmosphere, fresh water and seawater, neutral salts, and alkaline media. In more severe environments, the combination of nickel and chromium provides resistance to oxidizing chemicals, and the combination of nickel and molybdenum provides resistance to reducing conditions. The molybdenum content also makes Inconel 625 highly resistant to pitting and crevice corrosion. The columbium stabilizes the alloy against sensitization and prevents intergranular corrosion. The high nickel content provides freedom from chloride stress-corrosion cracking.

Inconel 625 made by NiWire is made into chemical processing equipment, aircraft engine and airframe components, ship and submarine parts, nuclear reactors.

Chemical Composition

Grade Ni% Cr% Mo% Nb+Ta% Fe% Al% Ti% C% Mn% Si% Cu% P% S%
Inconel 625 Min 58 20-23 8-10 3.15-4.15 Max 5 Max 0.4 Max 0.4 Max 0.1 Max 0.5 Max 0.5 Max 0.5 Max 0.015 Max 0.015

Specifications

Grade UNS Werkstoff Nr.
Inconel 625 N06625 2.4856

Physical Properties

Grade Density Melting Point
Inconel 625 8.4 g/cm3 1290°C-1350 °C

Mechanical Properties

Condition Tensile Strength Yield Strength σp0.2/MPa Elongation Brinell Hardness
Annealing Treatment (Grade 1) 850 Mpa 450 Mpa 30% ≤220
Solution Treatment (Grade 2) 700 Mpa 300 Mpa 30% ≤200

Inconel 625 Grade 2 is recommended for components that require optimum resistance to creep or rupture. Fine-grained (annealed) material may be advantageous at temperatures up to 1500°F with respect to fatigue strength, hardness, and tensile and yield strength.

Our Production Standard

Standard Bar Forging Pipe Sheet/Strip Fittings
ASTM ASTM B446 ASTM B564 ASTM B444/B704/B705 ASTM B443 ASTM B366

Welding of Inconel 625

Any traditional welding procedures can be used to weld Inconel 625 to similar alloys or other metals, such as gas tungsten arc welding(GTAW), plasma arc welding (PAW), metal inertia gas welding (MIG) and so on. Before welding, remove scale, grease, mark and imprint. And no heat treatment needed before and after welding. Recommend filler wire regarding welding Inconel 625: ERNiCrMo-3

Size Range

Inconel 625 wire, bar, rod, forging, plate, sheet, tube, fastener, pipe fittings and other standard forms are available.

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