Incoloy Alloy 25-6HN (UNS N08367) -- Itroduction & Supplier / Manufacturer in China (2025)

UNS N08367

UNS N08367

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Incoloy Alloy 25-6HN (UNS N08367) -- Itroduction & Supplier / Manufacturer in China (1)

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Introduction

Main Standards

Chemical Composition

Data Sheet

Applications

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Incoloy 25-6HN Introduction

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Solid Solution
Strengthened Alloy

Iron

Nickel

Chromium

Molybdenum

Nitrogen

Corrosion
Resistance

73

Mechanical
Behavior

69

Purity

94

Corrosion Resistance

Sulfuric
Acid

Hydrochloric
Acid

Hydrofluoric
Acid

Phosphoric
Acid

Nitric
Acid

Organic
Acids

Alkalies
and Salts

Seawater

Overview

As a leading supplier & manufacturer in China, AEETHER supply cost-effective Incoloy 25-6HN Products.

INCOLOY alloy 25-6HN is a super-austenitic stainless steel containing 6% molybdenum. The alloy’s properties are enhanced by its content of nitrogen. Its high content of nickel results in thermal stability and resistance to stress corrosion cracking. Designated as UNS N08367, alloy 25-6HN directly competes with similar super-austenitic stainless steels. Alloy 25-6HN is a new addition to Special Metals existing line of high performance, super-austenitic stainless steels, INCOLOY alloys 25-6MO and 27-7MO.

Alloy 25-6HN offers significantly improved strength and corrosion resistance in most environments over conventional austenitic stainless steels such as AISI 304 and 316L. Typical applications include welded tubes for heat exchangers for chemical processing and marine applications and for desalination systems, plate and sheet for flue gas desulfurization equipment for coal-fired power plants and plate for reaction vessels for pharmaceutical production.

Corrosion Resistance

INCOLOY alloy 25-6HN offers resistance to many modes of attack in a variety of aggressive environments. It is especially resistant to localized attack (crevice and pitting corrosion) in acid / halide media. Alloy 25-6HN also resists microbially-induced corrosion. With 25% nickel, the alloy is much more resistant to chlorideinduced stress corrosion cracking than austenitic stainless steels (AISI 300 grades).

The values for CPT and CCT of welded alloys are strongly influenced by the choice of filler material. While alloy 25 -6HN is normally joined with INCONEL filler metal 625, higher CPT values can be obtained with the moreresistant INCO-WELD 686CPT filler metal. Annealing after fabrication can also have a positive influence on the corrosion resistance of welded components.

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Incoloy 25-6HN Standards

ASTM B675

Welded Pipe

ASTM B804

Welded Pipe

ASTM B676

Welded Tube

ASTM B366

Welded Fittings

ASTM B462

Forged Flange & Fittings

ASTM B691

Rod, Bar, and Wire

ASTM B564

Forgings

ASTM B472

Forging Stock, Billet

ASTM B688

Plate, Sheet and Strip

ASTM A240

Plate, Sheet and Strip

Incoloy 25-6HN Chemical Composition

Data Sheet

Physical Properties

Density g/cm3 8.02
lb/in.3 0.290
Melting Range °F 2470 - 2560
Magnetic Permeability 200 Oersteds at RT 1.003
Coefficient of Thermal Expansion 68-212°F 8.49 in/in•°F x 10-6

Mechanical Properties

Temp. (°F) Property 25-6HN
77 Yield Strength (ksi) 55
Tensile Strength (ksi) 107
Elongation (%) 48
300 Yield Strength (ksi) 49
Tensile Strength (ksi) 93
Elongation (%) 47
400 Yield Strength (ksi) 46
Tensile Strength (ksi) 89
Elongation (%) 47
500 Yield Strength (ksi) 46
Tensile Strength (ksi) 86
Elongation (%) 47
600 Yield Strength (ksi) 43
Tensile Strength (ksi) 87
Elongation (%) 46
800 Yield Strength (ksi) 40
Tensile Strength (ksi) 84
Elongation (%) 45
1000 Yield Strength (ksi) 43
Tensile Strength (ksi) 80
Elongation (%) 48

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Incoloy 25-6HN Applications

Chemical ProcessingMarine

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More Incoloy Grades +

800 Si C Mn Al Ti Cu Fe Cr Ni 800H Si C Mn Al Ti Cu Fe Cr Ni 800HT Si C Mn Al Ti Cu Fe Cr Ni 803 Si C Mn Al Ti Cu Fe Cr Ni 825 Si Mn Al Ti Cu Mo Fe Cr Ni 832 Si Ti Cu Fe Cr Ni 864 Si C Mn Ti Cu Mo Fe Cr Ni 890 Si C Mn Ti Cu Nb Mo Fe Cr Ni 903 Al Ti Co Nb Fe Ni 907 Si Al Ti Co Nb Fe Ni 908 Si Mn Al Ti Cu Co Nb Fe Cr Ni 909 Si Mn Al Ti Cu Co Nb Fe Cr Ni 925 Si Mn Al Ti Cu Nb Mo Fe Cr Ni 926 Si Mn N Cu Mo Fe Cr Ni 945 Si Mn Al Ti Cu Nb Mo Fe Cr Ni 945X Si Mn Al Ti Cu Nb Mo Fe Cr Ni MA956 C Al Ti Fe Cr A-286 Si C Mn Al Ti V Mo Fe Cr Ni 020 Si C Mn Cu Mo Fe Cr Ni 028 Si Mn Cu Mo Fe Cr Ni DS Si C Mn Cu Co Fe Cr Ni 330 Si C Mn Cu Fe Cr Ni 25-6HN Si Mn N Cu Mo Fe Cr Ni 27-7MO Si Mn N Cu Mo Fe Cr Ni
Incoloy Alloy 25-6HN (UNS N08367) -- Itroduction & Supplier / Manufacturer in China (2025)
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