Inconel 625 Alloy N06625
Inconel 625 is a nickel chromium molybdenum alloy with a niobium addition that hardens the alloy together with aluminium, so it reaches high strength without a separate heat treatment or strengthening step. It resists a…
What This Product Is For
Inconel 625 is a nickel chromium molybdenum alloy with a niobium addition that hardens the alloy together with aluminium, so it reaches high strength without a separate heat treatment or strengthening step. It resists a wide range of harsh corrosive environments, and it is particularly strong against pitting and crevice corrosion. Typical uses are chemical plant, aviation and marine engineering, pollution control equipment and nuclear reactors.
Key Benefits
- High strength straight from the mill without a separate ageing or strengthening treatment
- Niobium and aluminium hardening keeps the alloy stable through fabrication
- Particularly resistant to pitting and crevice corrosion in chloride bearing media
- Proven across chemical, aviation, marine, pollution control and nuclear equipment
- Supplied across the product forms needed for a complete assembly
Who It Is For
- Aerospace and marine equipment manufacturers
- Chemical plant engineers specifying nickel chromium molybdenum alloys
- Pollution control equipment builders
- Buyers working to UNS N06625
Problems It Solves
- Stainless components that pit in seawater and chloride service
- Parts that lose strength when a post fabrication heat treatment is not practical
- Crevice corrosion under gaskets and lap joints
- Material substitution risk on nuclear and aviation specifications
Application Scenarios
- Marine engineering components exposed to seawater and salt spray
- Aviation hot section and exhaust hardware
- Pollution control and flue gas equipment
- Nuclear reactor components and chemical process internals
Specifications
Every value below is taken from the published product data. Where a figure is not published it is left out rather than estimated.
| Grade | Inconel 625, UNS N06625 |
|---|---|
| Alloy Family | Nickel chromium molybdenum alloy with niobium |
| Strengthening | Niobium with aluminium, no separate heat treatment required |
| Key Resistance | Pitting and crevice corrosion |
| Typical Sectors | Chemical, aviation, marine engineering, pollution control, nuclear reactors |
Technical Features
- Nickel chromium molybdenum alloy with a niobium addition
- Hardened by niobium together with aluminium rather than by heat treatment
- Designation UNS N06625
- High resistance to pitting and crevice corrosion
- Suited to chemical, aviation, marine, pollution control and nuclear service
Materials
- Nickel chromium molybdenum niobium alloy 625
Manufacturing Process
- Hot working
- Cold working
- Welding
- Machining
Quality Control
- Chemistry verified against the UNS N06625 composition
- Mechanical properties confirmed in the as supplied condition
- Dimensional inspection on each product form
- Certificate issued naming the grade and condition
Customisation Options
- Product form and size cut to your drawing
- Tube, pipe and bar supplied against the same grade
- Export packing to your specification
Use Guide
- Specify UNS N06625 on the order so the correct nickel chromium molybdenum chemistry is supplied
- No post fabrication strengthening treatment is needed to reach the alloy strength
- Use a matching nickel chromium molybdenum filler for welded joints
- Check crevice geometry at gaskets and lap joints even with this alloy
How It Compares With the Alternatives
| Inconel 600 | Alloy 625 adds molybdenum and niobium, which lifts strength and pitting resistance well above alloy 600 |
|---|---|
| Hastelloy C-276 | C-276 carries more molybdenum and tungsten for wet chlorine duty, while 625 offers higher strength for structural and aerospace parts |
| 316L stainless steel | 625 is in a different class for chloride pitting and for strength at temperature, which is why it is used in marine and nuclear hardware |
Related Products
Nickel 200 Seamless Pipe
Nickel 200 seamless pipe is commercially pure wrought nickel supplied to ASTM B161 under UNS N02200. It is the standard choice for…
View specifications →
Nickel Alloy 625 Exhaust Tubing
Nickel alloy 625 exhaust tubing is cold worked seamless tube covered by ASTM B444 under UNS N06625, also carried as BS 3074 NA21…
View specifications →
SS316 Equal Angle Bar 75 x 75 x 6 mm x 6 m
This is a 316 stainless equal angle bar in 75 x 75 x 6 mm section at 6 m length, produced to JIS, AISI and ASTM chemical…
View specifications →
Monel Alloy K500
Monel Alloy K500 is a nickel copper superalloy with high strength and strong corrosion resistance in marine environments. It is…
View specifications →Inconel 625 Alloy N06625 Questions
What is the UNS designation
Does the alloy need heat treatment to reach its strength
What corrosion is it best at resisting
Which industries use this grade
Can you supply pipe and bar in the same grade
How does it compare with Inconel 600
Quote Inconel 625 Alloy N06625
Send the size, wall or thickness, quantity and destination port. Certificates, packing and lead time are confirmed on the quotation.