What are Stainless Steel 309 Fasteners?

Stainless Steel 309 fasteners is a group of high temperature resistant fastener elements made of UNS S30900 stainless steel alloy, offering the properties such as 1093°C (2000°F) oxidizing resistant, good corroding resistant, remarkable mechanical strength, with types of SS 309 Bolts, SS 309 Nuts, SS 309 Screws, SS 309 Washers, rivet nuts, hex head bolt applied in furnaces, heat exchangers, petro-chemical plants, power generation equipment and processing industries etc.

Stainless Steel 309 Fasteners Manufacturer, Supplier & Exporter

Manufacturer, supplier, exporter of top quality Stainless Steel 309 Fasteners intended to serve severe conditions of both high temperature and corrosive environments in industries, which we offer in large variety including the standard SS 309 bolts, SS 309 nuts, SS 309 screws, SS 309 washers, rivet nuts, captive nuts, spring washers, tab washers and custom made fastening products conforming to various international standards ASTM, ASME, DIN, ISO.

Stainless Steel 309 fasteners are composed of the austenitic chromium-nickel alloys with improved percentage of chromium and nickel as compared to standard stainless steel grades. This allows these SS 309 Fasteners a good corrosion resistant, oxidation resistant, mechanical and temperature resistant property to cope with the requirements of high temperatures.

ASTM A193 Stainless Steel 309 Fasteners are used widely across various industries such as power generation, petrochemical plants, refineries, furnace construction, and heat treatment facilities, cement industries, marine engineering, and various industrial processing units etc.

Why Choose Stainless Steel 309 Fasteners?

The right selection of fastener material is of crucial importance to ensure safe operation and long service life of your equipment. Standard grades of stainless steel do not meet requirements under extreme temperature or corrosive oxidizing environments; that is when SS 309 fasteners would be your best bet.

Salient features of SS 309 Fasteners:

  • Resistant to oxidation at high temperatures
  • Excellent corrosion resistance to environments such as acid and alkalis
  • High tensile and yield strength
  • Excellent creep resistance
  • Outstanding weldability and fabrication properties
  • Good resistance to thermal cycling
  • Long service life with minimal maintenance
  • Reliable performance in high-temperature industrial applications

All the above qualities makes Stainless Steel 309 Fasteners highly acceptable for several critical industrial fastening jobs.

Stainless Steel 309 Fasteners

Types of Stainless Steel 309 Fasteners We Supply

Our comprehensive inventory includes a wide variety of Stainless Steel 309 Fasteners manufactured to international specifications.

➤ Stainless Steel 309 Bolts

We supply premium-quality Stainless Steel 309 Bolts in multiple configurations including:

  • DIN 1.4828 Bolts
  • 309 SS Hex Head Bolts
  • 309 SS Countersunk Bolts
  • Heavy Hex Bolts
  • Stud Bolts
  • Anchor Bolts
  • Flange Bolts
  • Eye Bolts

These bolts provide exceptional strength and durability in high-temperature service conditions.

➤ Stainless Steel 309 Nuts

Our range of Stainless Steel 309 Nuts includes:

  • ASME SA193 SS 309 Hex Nuts
  • Heavy Hex Nuts
  • Lock Nuts
  • Jam Nuts
  • Wing Nuts
  • Coupling Nuts
  • Square Nuts
  • Slotted Nuts

These nuts are precision manufactured to ensure proper fitment and secure fastening performance.

➤ Stainless Steel 309 Screws

We offer a complete range of Stainless Steel 309 Screws including:

  • Machine Screws
  • Self-Tapping Screws
  • Socket Head Cap Screws
  • Set Screws
  • Stainless Steel 309 Pocket Hole Screws
  • Phillips Head Screws
  • Hex Socket Screws

Our screws are widely used in industrial fabrication and equipment assembly.

➤ Stainless Steel 309 Washers

Our inventory includes:

  • Stainless Steel 309 Washers
  • UNS S30900 Plain Washer
  • SS 309 Spring Washer
  • DIN 1.4828 Tab Washer
  • DIN 1.4828 Star Washer
  • Fender Washers
  • Lock Washers

These washers help distribute loads evenly and prevent loosening under vibration and thermal expansion.

➤ Specialty Fasteners

We also supply:

  • 309 SS Rivet Nuts
  • UNS S30900 Captive-Nuts
  • Threaded Inserts
  • U-Bolts
  • Studs
  • Pins
  • Retaining Rings

Our engineering team can also manufacture custom fasteners according to project-specific drawings and requirements.

Chemical Composition of Stainless Steel 309 Fasteners

The chemical composition of Stainless Steel 309 contributes significantly to its excellent performance in high-temperature environments.

Element Percentage (%)
Carbon (C) 0.20 Max
Chromium (Cr) 22.0 – 24.0
Nickel (Ni) 12.0 – 15.0
Manganese (Mn) 2.00 Max
Silicon (Si) 1.00 Max
Phosphorus (P) 0.045 Max
Sulfur (S) 0.030 Max
Iron (Fe) Balance

Mechanical Properties of Stainless Steel 309 Fasteners

The alloy delivers excellent mechanical performance even under elevated temperature conditions.

Property Value
Tensile Strength 515 MPa Min
Yield Strength 205 MPa Min
Elongation 40% Min
Hardness 95 HRB Max
Density 7.89 g/cm³
Melting Range 1399 – 1454°C

Stainless Steel 309 Fasteners Specifications

Specification Details
Grade Stainless Steel 309
UNS Number UNS S30900
Werkstoff Number DIN 1.4828
ASTM Standards ASTM A193, ASTM A194
ASME Standards ASME SA193
Thread Standards Metric, UNC, UNF, BSW, BSF
Size Range M3 to M100
Length Custom & Standard Lengths
Surface Finish Plain, Passivated, Polished

Applications of ASTM A193 Stainless Steel 309 Fasteners

Because of their high strength in high temperature conditions and their excellent resistance to oxidation, the ASTM A193 Stainless Steel 309 fasteners are ideal for use in:

  • Petrochemical Industries: Reactors, pressure vessels, pipelines, process vessels and processing equipment operating under extreme temperature.
  • Furnace and Heat Treatment Equipment: Furnace assemblies, burners, heat exchangers and heat treatment systems.
  • Power generation plants: Boilers, turbines, power plant structure, exhaust system.
  • Cement industries: High temperature kiln, material handling equipment.
  • Marine and offshore engineering: Corrosive environments and seawater service, offshore equipment.
  • Chemical process industries: Processing equipment and processing plants where aggressive chemical and elevated temperature service is involved.

Reasons for Purchasing Our Stainless Steel 309 Fasteners

We endeavor to provide a quality that surpasses the global standard, with each and every lot subjected to several stages of strict inspection procedures to maintain dimension accuracy, material traceability and performance integrity.

Our Strength:
  • Large stock of SS 309 Fasteners readily available for delivery
  • Unbeatable prices offered to customers
  • Full set of material test certificates provided
  • Third party inspection can be supported on client request
  • Worldwide exportability of our products
  • Delivery timelines that are as per the requirements
  • Tailored manufacturing facilities on request
  • Technical support rendered by knowledgeable professionals

We are known as a Stainless Steel 309 Fasteners Supplier, which means strict quality checks maintained during production and inspection stages.

Stainless Steel 309 Fasteners Exporter in Texas, USA and Global Markets

We export SS 309 pocket hole screws, DIN 1.4828 SS 309 bolts, ASME SA193 SS 309 hex nuts, UNS S30900 plain washer, SS 309 spring washer, captive nut, rivet nut, and special fastening solutions to customers all over the world.

Our export network covers:

  • Texas, USA
  • United States
  • Canada
  • Germany
  • Netherlands
  • United Kingdom
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Singapore
  • Australia
  • South Africa

Each shipment is carefully packed to ensure safe transportation and timely delivery.

Related Stainless Steel Fasteners

We also supply:

Frequently Asked Questions (FAQ)

Yes. Stainless Steel 309 offers excellent oxidation resistance and can withstand temperatures up to approximately 1093°C (2000°F), making it ideal for furnace and heat-treatment applications.
The UNS designation for Stainless Steel 309 is UNS S30900.
The DIN/Werkstoff equivalent is DIN 1.4828.
Available products include Stainless Steel 309 Bolts, Stainless Steel 309 Nuts, Stainless Steel 309 Screws, Stainless Steel 309 Washers, captive nuts, rivet nuts, tab washers, spring washers, and custom-engineered fasteners.
Yes. They offer excellent resistance to oxidation, scaling, and various corrosive environments, especially when combined with elevated temperatures.

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