Nascent Fittings Inc.·Alloy Steel
Alloy Steel Flanges
Weld neck, slip-on, blind, socket weld & lap joint flanges in SS, CS, alloy, duplex & nickel. ASME B16.5/B16.47, Class 150–2500, MTCs & export.

- Material
- Alloy Steel
- Grades
- F1, F5, F9 +
- Corrosion
- Moderate
About
Alloy Steel Flanges
Product overview combined with Alloy Steel material context for project selection.
Our integrated facilities include facilities for cutting, forging, ring rolling and machines with CNC lathes, CNC drilling, high capacity forging press and mobile manipulator for making big diameter forged round bars. We also have an in-house heat treatment shop and well equipped laboratory facilities for ensuring the quality of our products.
Manufacturing note
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. We, Nascentfit Piping Stainless Steel Flanges Manufacturers in India. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.
Typical applications
- Power Generation
- Thermal Power Plants
- Refineries
- Petrochemical Plants
- Oil & Gas
- Pressure Vessels
Technical data
Specifications
Specifications
| Flanges | Specification |
|---|---|
| Type of Flanges | Weld Neck, Socket Weld, Slip-on, Blind, Screwed/Threaded, Long Weld Neck, Lap Joint, Spectacle Blind |
| Size | 15NB To 1200NB, ANSI B 16.5 |
| Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Stainless Steel | ASTM A182 F-304/304H/304L/316/316H/316/316Ti, 309, 310, 317L, 321, 347, 904L |
| Duplex and Super-Duplex Steel | ASTM A 182-F51, F53, F55 |
| Nickel | ASTM B 564 N02200, N02201 |
| Inconel | ASTM B 564 N06600, N06601, N06617, ASTM B 564 N07718, ASTM B 564 N06625 |
| Incoloy | ASTM B 564 N08800, N08810, ASTM B 564 N08825, ASTM B 564 N08020 |
| Hastelloy | ASTM B 564 N10276, N06022, ASTM B 564 N10665, ASTM B 564 N06455 |
| Titanium-Commercially | ASTM B 861, 862, 338 Gr.1 R 56250(CP4) |
| Titanium-Pure | Gr.2 R 50400(CP3) Gr.3 R 50550(CP2) Gr.4 R 50700(CP1) Gr.7 R 52400 Gr.11 R 52250 |
| Titanium-Alloys | ASTM B 861, 862, 338 Gr.5 R 56400(6AI-4V) Gr.23 R 56401(6AI-4V-ELI) Gr.12 R 53400 |
| Cupro Nickel | ASTM B 171 C70600(90:10), ASTM B 171 C71500(70:30) |
| Monel | ASTM B 564 N04400 DIN N05500 |
| Carbon Steel | ASTM A 234 WPB, IS 1239 PART II |
| Alloys Steel | ASTM A 234 WPB WP5, WP9, WP11, WP12, WP91 |
| Low Temp. CS | ASTM A-420 WPL6 |
| Other Service | Hot Dip Galvanizing, Sand Blasting |
| Test Certificate | Manufacturer Test Certification En 3.1 and 3.2, IBR Test Certificate |
| Specializing In:Large Diameter CS Pipes and Duplex Steel | Inconel®, Incoloy®, Monel®, Hastelloy®, Duplex® are Registered Trade Marks of their Respective Owners. |
Alloy Steel grades
Available grades for Flanges
Drawn from the Alloy Steel catalog and this product’s material specification.
F1
Low alloy steel with improved temperature resistance.
Best for · Moderate temperature service
F5
5% chromium alloy steel with improved oxidation resistance.
Best for · High temperature applications
F9
9% chromium alloy steel with superior heat resistance.
Best for · Elevated temperature service
F11
Chrome moly alloy steel offering excellent creep resistance.
Best for · High-pressure steam service
F22
2.25% chromium and 1% molybdenum alloy steel.
Best for · High temperature pressure systems
F91
Premium 9Cr-1Mo-V alloy steel with exceptional creep resistance.
Best for · Ultra-supercritical power plants
WP12 / F12
1.25Cr-0.5Mo alloy steel buttweld grade related to ASTM A234 WP12 / A182 F12 for elevated temperature service.
Best for · Chrome-moly buttweld fittings
Also available in
Other materials for this product
View Flanges in another material grade family.
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Material
Duplex Steel
F51
View
Material
Cupro Nickel
Cu-Ni 90/10 (C70600) · Cu-Ni 70/30 (C71500)
View
Material
Monel
Monel 400 · Monel K500
View
Material
Nickel Alloy
Nickel 200 · Nickel 201
View
Material
Hastelloy
Hastelloy C-276 · Hastelloy C-22
View
Material
Titanium
Grade 1 · Grade 2
View
Material
Stainless Steel
F304 · F304H
View
Material
Carbon Steel
ASTM A234 WPB
View
Material
Low Temperature Carbon Steel
ASTM A420 WPL6
View
Material
Copper
C11000 (ETP) · C12200 (DHP)
View
Material
Copper Alloy
UNS C70600 (Cu-Ni 90/10) · UNS C71500 (Cu-Ni 70/30)
ViewConfigurations
Alloy Steel Flanges types
Open a type for drawings-aligned specifications.

Alloy Steel ASTM A182 SS 304 Flanges

Alloy Steel ASTM A182 SS 304h Flanges

Alloy Steel ASTM A182 SS 304l Flanges

Alloy Steel ASTM A182 SS 310 Flanges

Alloy Steel ASTM A182 SS 310s Flanges

Alloy Steel ASTM A182 SS 310H Flanges

Alloy Steel ASTM A182 SS 316 Flanges

Alloy Steel ASTM A182 SS 316l Flanges

Alloy Steel ASTM A182 SS 316Ti Flanges

Alloy Steel ASTM A182 SS 317 Flanges

Alloy Steel ASTM A182 SS 317l Flanges

Alloy Steel ASTM A182 SS 321 Flanges

Alloy Steel ASTM A182 SS 321h Flanges

Alloy Steel ASTM A182 SS 347 Flanges

Alloy Steel ASTM A182 SS 347h Flanges

Alloy Steel ASTM A182 SS 410 Flanges

Alloy Steel ASTM A182 SS 446 Flanges

Alloy Steel ASTM A182 SS 904l Flanges
Compliance
Standards & certificates
Specifications and documentation support typically referenced for this product line.
Standards
14- 01ASME A182
- 02DIN Flanges
- 03ANSI B 16.5
- 04ASTM A182
- 05ASTM A 182-F51
- 06ASTM B 564
- 07ASTM B 861
- 08ASTM B 171
- 09ASTM A 234
- 10ASTM A-420
- 11En 3
- 12IS 1239 PART II
- 13DIN N05500
- 14ASME SA182
Certificates
5- EN 10204 3.1
- ISO 9001
- PED
- IBR
- NACE MR0175
Manufacturing
Crafted with care
Workshop and production views for Alloy Steel Flanges — the same craftsmanship photos from our plant archives, shown in webp.
4 photos




People also ask
Questions about Flanges
Nascent Fittings Inc. answers common buyer questions for this line.
Does Nascent Fittings Inc. manufacture Flanges?+
Yes. Nascent Fittings Inc. manufactures and supplies Flanges for industrial piping projects, with material grades and sizes aligned to project specifications.
Can Nascent Fittings Inc. export Flanges worldwide?+
Yes. We export Flanges globally with standard export packaging, material test certificates, and documentation support for international shipments.
What materials are available for Flanges?+
Flanges is available in carbon steel, alloy steel, stainless steel, duplex, nickel alloys, copper alloys, aluminium, titanium and other project-specific materials as required.
Need pricing for Alloy Steel Flanges?
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