Incoloy 825(Ni – Cr – Mo)

1. Introduce

– Ni – Cr alloy with a small amount of Mo added

– Similar to Incoloy 800 with improved corrosion resistance and high temperature strength

– Used in a temperature range of approximately 871 to 1176°C

– UNS N08825

* UNS

1. Abbreviation for Unified Numbering Systems for Metals and Alloys
2. Unified numbering system for metals and alloys
3. A representative number that is compatible with metals and alloys defined in many material – related codes such as ASTM, AISI, ASME, AWS, etc.

* N : Nickel and Nickel Alloys

* 825 : N08825 : 08XXX : Fe – Cr (Incoloy, Haynes)
(The last two or three digits of the six UNS numbers are used as the alloy model number)

* Incoloy

1. Ni – Cr alloy designed to resist oxidation and carbonization at high temperatures
2. A Ni – based superalloy (Ni – Cr) typically with large additions of Fe and Cr
3. Alloy containing less than 50% Ni, with a higher content of Fe compared to Inconel (Ni – Cr – (Mo))

2. Property

– Excellent stress corrosion cracking resistance, crevice corrosion resistance, and oxidation resistance

(Excellent pitting and crevice corrosion resistance in the temperature range of 650 ~ 760℃)

– 1200 to 1400°C Severe intergranular corrosion may occur with prolonged exposure

[Incoloy 825 Chemical Composition (%)]

[Incoloy 825 Mechanical Properties]

[Incoloy 825 Physical Properties]

3. Standard & Specification

– Specifications : UNS N08825

4. Available Form

– Rod & Bar

– Wire

– Forgings

– Plate & Sheet & Strip

– Pipe & Tube

5. Application & Product

– Chemical, Oil & Gas

(1) Sulfuric acid tank vessel / (2) Pickling tank / (3) Oil and gas production facility / (4) Pipes for oil and gas industry