Inconel 600 Flanges

Inconel 600 Flanges are forged from UNS N06600, a nickel-chromium alloy with around 72% nickel, 14 to 17% chromium, and 6 to 10% iron. The high nickel content makes it highly resistant to chloride stress corrosion cracking and a wide range of reducing environments. Chromium adds protection against oxidation and sulphur compounds at high temperatures. These flanges perform reliably from cryogenic service up to approximately 1093°C. They conform to ASTM B564 for material and ASME B16.5 for dimensions. Heat treatment, chemical processing, nuclear engineering, and aerospace are regular users.

Price of Inconel 600 Flanges

The approximate price of Inconel 600 Flanges per kg/unit, along with the factors affecting their price, is mentioned below in detail.

Approx Price Range

Flanges are made from forgings and bars, which are more expensive than the bar stock. In India, Inconel 600 Flanges are available at a cost of approximately between Rs 2500 and Rs 3500. Actual flange pricing will be higher and will be based on size, pressure class, facing type, and order volume.

Price Per Unit / Kg

Per-kg cost for ASTM B564 UNS N06600 flanges changes based on the pressure class. The price range for Inconel 600 flanges per piece in India is approximately ₹650 – ₹42,000 INR (about $8 – $620 USD), depending heavily on size, type, and specification. 

Factors Affecting Price

Nickel commodity rates, order quantity, forging size, pressure class, and delivery lead time all directly affect the per-kg price of Alloy 600 flanges.

Types of Inconel 600 Flanges

UNS N06600 flanges are available in several face and connection types. The correct choice depends on the pipe end preparation, joint design, and operating pressure of the system.

• Inconel 600 Weld Neck Flanges
• Inconel 600 Slip-On Flanges
• Inconel 600 Blind Flanges
• Inconel 600 Socket Weld Flanges
• Inconel 600 Threaded Flanges
•  Inconel 600 Lap Joint Flanges
• Inconel 600 Orifice Flanges

Alloy 600 Flanges Specifications

The following table covers the key standards, size range, grade, and parameters that apply to UNS N06600 flanges.

Chemical Properties of Inconel 600 Flanges

The alloy's corrosion and heat resistance come from its nickel-chromium balance. The relatively low carbon content limits carbide precipitation at grain boundaries during welding.

Mechanical Properties of UNS N06600 Flanges

N06600 derives its strength from solid solution hardening. No precipitation treatment is needed, which simplifies fabrication and welding.

Physical Properties of ASTM B564 Inconel 600 Flanges

These values define the behaviour of the material subject to thermal and physical conditions of interest to piping design and fabrication.

Dimension Chart of Inconel 600 Flanges

The table below shows standard raised face weld neck flange dimensions for common nominal pipe sizes in UNS N06600.

Size Chart of UNS N06600 Flanges

Inconel 600 flanges are available across a broad size range under two ASME standards, covering most industrial piping requirements.

Pressure Rating Chart of Alloy 600 Flanges

The pressure ratings below apply to Alloy 600 flanges at ambient temperature (38°C). Ratings drop at higher service temperatures.

Key Features of Inconel 600 Flanges

The 7 important features of Inconel 600 Flanges are mentioned below in detail.

• Outstanding resistance to oxidation and scaling at temperatures up to 1093°C.
• Highly resistant to chloride-induced stress corrosion cracking, where austenitic stainless steels typically fail.
• Good resistance to dry chlorine and hydrogen chloride gas at elevated temperatures, thus making it suitable for chlorination units.
• Resistant to corrosion from high-purity water used in nuclear reactor piping systems.
• Performs well in carburising and nitriding atmospheres found in heat treatment furnaces.
• Solid solution strengthened, so no post-weld heat treatment is required in most applications.
• Retains ductility and toughness from cryogenic temperatures to high-heat service conditions.

Applications of Inconel 600 Flanges

N06600 flanges are used in industries where high temperatures, oxidising atmospheres, or aggressive chemical environments rule out standard grades.

• Heat Treatment
• Chemical Processing
• Nuclear Engineering
• Aerospace
• Food Processing
• Pulp and Paper

How to Choose the Right Inconel 600 Flange Supplier?

To choose the right Inconel 600 Flange, follow the steps mentioned below.

Supplier Selection Criteria

Ask for EN 10204 3.1 mill test certificates for every heat of N06600 material used. The certificate should show both chemical analysis and mechanical test results, traceable to the heat number. Suppliers who cannot provide heat-traceable documentation should be avoided for any safety-critical application.

Technical Considerations

Confirm the pressure class and facing type before placing an order. For most applications, raised face (RF) is the standard, but ring-type joint (RTJ) facing is often specified for high-pressure systems. Inconel pipe schedules are different from carbon steel dimensions, so compare the bore size with your pipe schedule.

Quality & Certification Check

For nuclear or aerospace applications, look for third-party inspection under EN 10204 3.2, with witness testing by an approved body such as TUV, LRQA, or Bureau Veritas. Confirm NACE MR0175 / ISO 15156 compliance documentation if the flanges are going into sour gas service.

Procurement Tips for Bulk Orders

Alloy 600 is a speciality alloy. Not all sizes and pressure classes are held in stock. Raise your requirements early and confirm lead times before committing to a project schedule. For large orders, ask for a full traceability report linking each piece to its heat number and inspection record. Verify packaging requirements if the flanges are destined for offshore or export destinations.