How do heat treatment and surface finishing processes contribute to the manufacturing of Incoloy 800 flanges?
Resistance to oxidation and pitting makes these piping components coveted by diverse industries. Incoloy 800 flanges have iron, nickel, and chromium and boast impressive mechanical properties like high tensile strength.
The standard heat treatment is annealing at 982°C after undergoing cold work. This material can also be solution annealed at approx. 980°C. As for typical finishes, these include pickled (hot rolled), hairline, sandblasted, and polished.
These treatments make an Incoloy flanges suitable for heat-treating equipment, nuclear plants, etc. But the flipside is they raise lead times and costs and constrict availability as mills need to undertake additional processes. Following the requisite temperature norms is crucial to avoid grain growth and other deformities during the processing.
Alloy 800H blind flanges manufacturer in India
Why is Alloy 800H blind flanges corrosion resistant?
The corrosion resistance of these flanges is enviable –Alloy 800H blind flangescan handle exposure to nitric acids, acetic acids,and chloride ions.These flanges resist oxidation, carburisation, nitriding, and sulfidation.
This property stems from its chemical profile. A Werkstoff nr. 1.4876 pipe flanges has a large amount of chromium and beneficial inclusions of copper and titanium. Molybdenum and aluminium also play vital roles.
Find a stockist of Alloy 800 flanges and Incoloy flange who provides MTC and ultrasonic testing certificates
Incoloy 800 flanges
Alloy 800 flanges
Incoloy flange
What are some of the disadvantages or limitations of using Alloy 800 flanges in piping systems?
From food processing to furnace equipment, multiple industries depend on these flanges. However, Alloy 800 flangespose some disadvantages:
- Expensive due to the higher production cost
- Complex and tough to machine
- Mandates careful storing
- Availability may be limited (it renders procurement difficult and delays project completion)
- Requires meticulous welding to avoid stress-related cracking
Incoloy 800HT slip on flanges and ASTM B564 UNS N08800 weld neck flange available in sizes ranging from 1/2″ (15 NB) to 48″ (1200NB)
Table of Content
Specifications of Incoloy 800 flanges
| Size | Pressure | Standard |
|---|---|---|
| 1/2 to 60 inch NB | PN6 to PN64 | ANSI/ASME B16.5, B16.47 Series A & B |
| Specification | Class | Face type |
| ASTM B564 | ASME SB564 | 150, 600, 300, 1500, 900, 2500 | RF, FF, RTJ |
Nickel 800H socket weld flange and Werkstoff nr. 1.4876 pipe flange with Ultrasonic (UT) nondestructive testing
Types of Alloy 800 flanges
Alloy 800H blind flanges
- Sizes: 1/2 to 60 inch NB
- Class: 150# to 2500#
Incoloy 800HT slip on flanges
- Face type: Ring Type Joint (RTJ), Raised Face (RF), Flat Face (FF)
ASTM B564 UNS N08800 weld neck flange
- Pressure: PN6 to PN64
- Standard: ASTM B564 | ASME SB564
Nickel 800H socket weld flange
- ASME standard: ANSI/ASME B16.5
- Types : Blind, Weld neck, Slip On, Reducing Flange
Werkstoff nr. 1.4876 pipe flange
- Application: Aerospace, Chemical Processing & Power Generation
ASME SB564 UNS N08811 raised face flanges
- Production technique: Forged, Heat treated and machined
ASME SB564 UNS N08811 raised face flanges and Incoloy 800 plate flanges types & standards as per ANSI/ASME B16.5, DIN, ISO, JIS etc
Chemical composition of Incoloy flange
| Grade | C | Mn | Si | Fe | S | Cr | Al-Ti | Ni | |
|---|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | min. | – | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| Incoloy 800H | min. | 0.05 | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| Incoloy 800HT | min. | 0.06 | – | – | 39.5 | – | 19.0 | 0.85/0.25 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 1.20/0.60 | 35.0 | |
Mechanical properties of ASTM B564 UNS N08800 blind flanges
| Grade | Tensile Strength (MPa) minimum | Yield Strength 0.2% Proof (MPa) minimum | Elongation (% in 50 milimeter) minimum | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) maximum | Brinell (HB) maximum | ||||
| 800-H-HT | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa –205 | 30 | – | – |
Equivalent of Incoloy 800HT slip on flanges
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ЭИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800H | 1.4958 / 1.4876 | N08810 | NCF 800H | NA 15(H) | ЭИ670 | Z8NC33-21 | X5NiCrAlTi31-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15(HT) | ЭИ670 | – | X8NiCrAlTi32-21 | XH32T |
How does the size of an Incoloy flange affect its performance under different pressures?
The size of the flanges – specifically, their thickness – determines performance under pressure. A thicker nickel 800H socket weld flanges can stand more pressure. It will have a higher flange rating and be heavier also.
You should adjudge the size in light of the heat dissipated while welding. A consistent stress distribution decreases the chance of leakage and performance problems.
It extends the lifespan of the flanges too – a substantial plus for pricey super-alloys like Incoloy!
Besides the size, the type decides the pressure-handling capability. For example, ASME SB564 UNS N08811 raised face flanges focus pressure on the gasket area and make the joint more capable of handling severity.
What is the purpose of using a tongue-and-groove face type for Incoloy 800HT slip on flanges?
This face type is favoured in high-pressure applications where safety is paramount. Incoloy 800HT slip on flanges of this type can work with inflammable or hazardous substances in oil and gas systems, water supply pipes, and structural applications also.
The basic structure involves a tongue and a grooved face (with the gasket). The former has a machined raised ring which mates with the corresponding depression in thelatter. The limited contact between the gasket and the media minimises the likelihood of corrosion. Also, since the gasket does not extrude, the compression areaand the necessary bolt force reduces.
What factors contribute to the price difference of ASTM B564 UNS N08800 weld neck flange between India and China?
These flanges are expensive since Incoloy has limited availability and face machining challenges. While procuring an ASTM B564 UNS N08800 weld neck flanges for your application, we advise comparing prices across suppliers.
China and India are among the top providers of these flanges. The prices of Incoloy 800 in India start from Rs. 1,200 a kilogram; Chinese suppliers’ prices are in the ballpark or lower
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Global market trends, the availability of raw materials, and regional manufacturing practices decide prices. Shipping of Incoloy 800 plate flanges accounts for some of the price differentials, and vendors with scalable logistical partners offer competitive rates.