Stainless Steel 321 Flanges

Stainless Steel 321 Flanges Stainless Steel 321 Flanges – Leading Manufacturer & Supplier in India

What are Stainless Steel 321 Flanges?

Stainless Steel 321 Flanges are high-performance flanges made from stabilized austenitic stainless steel that contains titanium (Ti) for enhanced resistance to intergranular corrosion. The addition of titanium prevents carbide precipitation during welding, making SS 321 an ideal choice for high-temperature applications in industries such as aerospace, chemical processing, power generation, and heat exchangers.

Compared to SS 304 and SS 316, SS 321 flanges offer superior performance in environments with high thermal conditions due to their oxidation resistance up to 900°C (1652°F).

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Applications of Stainless Steel 321 Flanges

Stainless Steel 321 Flanges are widely used in various industries due to their high-temperature resistance, corrosion resistance, and durability. These flanges play a crucial role in connecting, supporting, and sealing pipelines in different environments. Some of the key application areas include:

Aerospace & Jet Engine Components
SS 321 flanges are used in aircraft exhaust manifolds, jet engine components, and heat exchangers due to their ability to withstand extreme temperatures and resist oxidation.

Chemical & Petrochemical Industry
The corrosion resistance and titanium stabilization of SS 321 make it ideal for use in chemical reactors, pressure vessels, and pipelines handling acidic or aggressive fluids.

Power Generation Plants
These flanges are used in boilers, heat exchangers, and steam turbines in power plants where high thermal resistance and mechanical strength are essential.

Oil & Gas Industry
SS 321 flanges are commonly found in offshore drilling platforms, refineries, and gas processing plants, as they resist chloride-induced stress corrosion cracking.

Food Processing & Pharmaceutical Industry
Due to their non-reactive nature and ability to withstand sterilization processes, SS 321 flanges are used in sanitary piping, beverage production, and pharmaceutical manufacturing.

Automotive & Exhaust Systems
The heat resistance and durability of SS 321 make it an excellent material for automobile exhaust manifolds, catalytic converters, and muffler systems.

Marine & Shipbuilding Industry
These flanges are widely used in shipbuilding, desalination plants, and marine pipelines, where they resist saltwater corrosion and harsh environmental conditions.

Why Choose Mahadev Dairy Pharma Fitting For Stainless Steel 321 Flanges?

  1. Superior High-Temperature Resistance

SS 321 Flanges withstand oxidation and scaling up to 900°C, making them perfect for heat exchangers, furnaces, and exhaust systems.

  1. Excellent Corrosion Resistance

Due to titanium stabilization, SS 321 flanges resist intergranular corrosion, preventing sensitization and weld decay in welding applications.

  1. Enhanced Durability & Strength

With its high tensile and yield strength, SS 321 provides excellent mechanical properties for use in high-pressure and thermal stress conditions.

  1. Extended Service Life in Harsh Environments

SS 321 flanges exhibit resistance to acids, chemicals, and oxidation, ensuring longevity and reliability in chemical plants, refineries, and marine environments.

Stainless Steel 321 Flanges Manufacturer in India

As a leading Stainless Steel 321 Flanges Manufacturer in India, we specialize in producing precision-engineered SS 321 flanges that conform to international quality standards such as ASTM, ASME, ANSI, DIN, and EN.

Our key offerings include:
Premium quality SS 321 flanges in various sizes & pressure ratings.
Custom fabrication based on industry-specific needs.
Third-party testing & certification for guaranteed quality.
Global exports and timely deliveries.

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Specifications of Stainless Steel 321 Flanges

Specification

Details

Material Grade

Stainless Steel 321 (Titanium Stabilized Austenitic)

Standard

ASTM A182 / ASME SA182

Size Range

½” to 48” (DN15 to DN1200)

Pressure Ratings

150#, 300#, 600#, 900#, 1500#, 2500#

Face Type

RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint)

Types

Slip-On, Weld Neck, Blind, Threaded, Socket Weld, Lap Joint, Orifice, Expander, Reducing

Connection Type

Bolted, Welded, Threaded

Temperature Resistance

Suitable for high & low temperature applications

Corrosion Resistance

Superior resistance to oxidation, pitting, and crevice corrosion

Chemical Composition of Stainless Steel 321 Flanges

Element

Composition (%)

Carbon (C)

0.08 max

Manganese (Mn)

2.00 max

Phosphorus (P)

0.045 max

Sulfur (S)

0.030 max

Silicon (Si)

1.00 max

Chromium (Cr)

17.0 – 19.0

Nickel (Ni)

9.0 – 12.0

Titanium (Ti)

5x(C+N) min, 0.70 max

Nitrogen (N)

0.10 max

Mechanical Properties of Stainless Steel 321 Flanges

Property

Value

Tensile Strength

515 MPa (min)

Yield Strength

205 MPa (min)

Elongation

40% (min)

Hardness (Brinell)

217 max

Hardness (Rockwell B)

95 max

Stainless Steel 321 Flanges Export Destinations

Region

Countries

Middle East

Saudi Arabia, Iran, Iraq, UAE, Qatar, Bahrain, Oman, Kuwait, Turkey, Yemen, Syria, Israel, Jordan, Cyprus

Asia

Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia

South America

Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay

North America

United States, Canada, Mexico, Panama, Costa Rica, Puerto Rico, Trinidad and Tobago, Jamaica, Bahamas

Europe

Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherlands, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta

Africa

Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, Republic of Congo, Gabon

Continental Supply

Europe, Africa, Asia, North America, South America, Middle East, Far East

Stainless Steel 321 Flanges Supply in Indian States & Cities

State

Major Cities

Andhra Pradesh

Vishakhapatnam, Vijayawada

Gujarat

Ahmedabad, Surat, Rajkot, Vadodara

Karnataka

Bengaluru

Kerala

Cochin

Maharashtra

Mumbai, Navi Mumbai, Pune, Nashik, Nagpur, Solapur, Kolhapur, Ambernath, Ahmednagar, Latur

Tamil Nadu

Chennai

Telangana

Hyderabad

Uttar Pradesh

Kanpur, Ghaziabad, Noida

West Bengal

Kolkata, Durgapur

Union Territories

Delhi, New Delhi, Chandigarh

Order High-Quality Stainless Steel 321 Flanges Today!

If you’re looking for top-quality SS 321 Flanges, we offer a wide range of standard and custom-manufactured flanges that guarantee strength, corrosion resistance, and durability. Contact us today for competitive pricing and bulk orders!

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Frequently Asked Questions - Stainless Steel 316 Flanges

SS 321 flanges contain titanium, which stabilizes the alloy and prevents carbide precipitation at high temperatures (up to 900°C / 1652°F). This makes them ideal for heat exchangers, exhaust systems, and furnace parts.

Popular types include:

  • Weld Neck Flange (for high-stress applications)
  • Slip-On Flange (easy installation)
  • Blind Flange (for sealing pipe ends)
  • Socket Weld Flange (for small-diameter pipes)
  • Threaded Flange (for non-welded connections)

Both SS 321 and SS 347 are stabilized stainless steels, but:

  • SS 321 is stabilized with titanium (Ti), making it ideal for moderate temperature applications.
  • SS 347 is stabilized with niobium (Nb), offering better high-temperature performance and oxidation resistance.

These flanges are widely used in:

  • Aerospace & Jet Engine Components
  • Refineries & Petrochemical Plants
  • Marine & Shipbuilding Industry
  • Power Plants & Heat Exchangers
  • Pharmaceutical & Food Processing Equipment

The price depends on:

  • Raw material costs (Nickel & Titanium content)
  • Flange type, size, and pressure rating
  • Manufacturing standards (ASTM, ASME, ANSI, etc.)
  • Market demand & supply chain conditions

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