Stainless Steel 321 Fasteners

Stainless Steel 321 Square Neck Bolts Suppling at Jordan, SS UNS S32100 Stud Bolts, Stainless Steel 321 Spring Washers, SS 321 Self Tapping Screw, Stainless Steel 321 T-Head Bolts Suppling at Poland, SS 321 Threaded Rods Manufacturing at France, SS 321 Fasteners Supplier & Exporter in Mumbai India.

Alpha Overseas manufactures and trades SS 321 Fasteners, where maximum stabilization is accomplished by annealing between 1750 Degree F and 1850 Degree F. Alloy 321 Fasteners is the grade of choice for applications in the temperature range of up to about 900 Degree C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion. While Grade 321 Fasteners continues to be employed for prolonged service in the 800 Degree F to 1500 Degree F temperature range, Type 304L has supplanted this stabilized grade for applications involving only welding or short time heating. Type 321 Fasteners displays good oxidation resistance at elevated temperatures has excellent resistance to intergranular corrosion and has excellent weldability. Even more effective way against carbide precipitation is addition of Titanium (Ti) to AISI 321 Nuts Bolts to “stabilize it”. 321 Stainless Steel Fasteners is used primarily in applications involving continuous and intermittent service temperatures within the carbide precipitation range of 427 Degree C – 816 Degree C.

SS 321 Fasteners
SS 321 Fasteners
Stainless Steel 321 Fasteners
Stainless Steel 321 Fasteners

Stainless Steel 321 Hex Nut Suppling at Germany, SS DIN 1.4541 Allen Cap Screw Suppling at Indonesia, ASTM A193 SS Threaded Stud Manufacturer, Stainless Steel 321 Hexagon Nut, SS 321 Hex Domed Cap Nuts Manufacturing at Tunisia, Stainless Steel 321 Hex Head Screw Manufacturer & Stockist in Mumbai, India.

Stainless Steel 321 Nuts is not subject to weld decay (intergranular corrosion) when exposed to mildly corrosive environments. Stainless Steel 321 Bolts is similar to type 304 stainless but with a titanium addition of at least five times the carbon content.

Stainless Steel 321 Washers is also advantageous for high temperature service because of its good mechanical properties. The carbon in Stainless Steel 321 Screws is more attracted to the Titanium (Ti) and therefore it leaves the chromium alone.


ASTM A193, ASTM A194 SS Fasteners Specification :

Specifications : ASTM A193 / A193, ASME SA193 / SA194

Standards : DIN, ASTM, BS and all International Standards

Length : 3 mm to 200 mm

Size : M02 to M33

Nuts Size : M3 - M56 | 3/6" to 2" | Custom Sizes

Bolt / Screw Size : M3 - M56 | 3/6" to 2" | Custom Sizes

Machine Screws Size : M1.6 - M12

Washers Size : M3 - M56 | 3/6" to 2" | Custom Sizes


SS 321 Fasteners Equivalent Grades

SS 321 1.4541 S32100


Stainless Steel 321 Fasteners Chemical Composition

Element Ni C Mn P S Si Cr
SS 321 9.00 – 12.00 0.08 2.00 0.045 0.030 1.00 17.0-19.0


SS Fasteners Mechanical & Physical Properties

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
SS 321 8.0 g/cm3 1454 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 40 %

Testings (Destructive, Non Destructive):
  • Positive Material Identification - PMI Testing
  • Chemical Analysis - Spectro Analysis
  • Mechanical Testing Such as Tensile, Elongation
  • Micro Test
  • Macro Test
  • Hardness Test
  • Pitting Resistance Test
  • Intergranular Corrosion (IGC) Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • Radiography Test
  • Dye Penetrant Test (DP Test)
  • Ultra Sonic Test (UT)
  • Eddy Current Testing
  • Impact Test
  • Bend Test


  • We understand the importance of packaging specially in case of international shipments as the consignment has to go through a number of channels to reach the final destination, thus we take proper care of packing.
  • We pack our goods in a various ways depending on the products. The different ways in which our products are packed are:
    • Shrink-wrapped
    • Wooden Boxes
    • Wooden Pallets
    • Wooden Crates
    • Carton boxes


  • All our products will have complete marking details which are co-related to the test certificates we supply.
  • In case of orders for cut piece of Pipes, Sheets or Round Bars, the marking is transferred from the product from which it is cut. In such cases we provide Letter confirming the marking transfer and picture of the product from which it is cut.


Delivery Time:
  • If the items are available in stock, we take 2 days from the date of receipt of advance payment to clear the shipment and send it to port.
  • And in-case the items are not availabe in stock, the time taken for manufacturing depends on the size, quantity and grade.
  • However we can claim the fact that we can compete with anyone in India on Delivery time and most of the time our production time is the least.
  • We have tied up with strong logistic partners in India which can undertake any type of shipping activites and make sure that there is no delay in shipment.


  • We welcome stage wise inspection, final stage inspection from any of your representative or third party inspection agencies.
  • We regularly have inspections ongoing at our premises from internationally acclaimed Inspection Agencies such as TUV, Llyods, BVIS, SGS, DNV etc.


  • Furnaces (piping, doors, burners, fans and recuperators)
  • Components (Cryogenic)
  • Industries processing food
  • Bed Furnaces (Fluidized) suc as grids, wind boxes, piping, coal combustors
  • Stainless Steel 321 is used in smelter and steel melting equipment, continuous casting equipment in Steel Plants and Ore Processing Plants
  • Petroleum and Petrochemical refineries for catalytic recovery systems, flares, recuperators, tube hangers
  • Stainless Steel 321 is used in Power Generation for coal gasifier internals, pulverized coal burners, tube hangers
  • Sintering/Cement Plants – burner shields, burners, wind boxes feeding and discharging systems
  • Thermal Process Plants for annealing covers and boxes, burner grids, doors, fans, muffles and retorts, recuperators, walking beams

Other Types Of SS Fasteners
  • SS 321 Fasteners
  • Stainless Steel 321 Mushroom Head Square Neck Bolts
  • SS DIN 1.4541 Hex Head Screw Suppliers
  • SS UNS S32100 Threaded Stud
  • 321 Stainless Steel Hex Domed Cap Nuts Suppliers at Slovakia
  • 321 Stainless Steel Marine Anchors
  • SS 321 Eye Bolts
  • 321 SS Spring Washers Exporter
  • 321 SS Pan Head Screw
  • Stainless Steel 321 T-Head Bolts
  • SS 321 Wing Screw Exporter
  • Stainless Steel 321 Structural Bolts
  • Stainless Steel 321 Fasteners
  • SS 321 Bolts Stockist
  • Stainless Steel 321 Screw
  • Stainless UNS S32100 Nuts
  • SS 321 Washers Exporter
  • ASTM A193 SS 321 Allen Cap Screw
  • ASME A194 Stainless Steel Machine Screws Suppliers
  • SS 321 Hexagon Nuts Stockist
  • SS 321 U Bolts Manufacturer
  • 321 SS Spring Washers Dealers
  • Stainless Steel DIN 1.4541 Foundation Bolts
  • Stainless Steel 321 J Bolts

Approved manufacturer of
Sabic approved Stainless Steel 321 Bolts
KNPC approved SS 321 Nuts
Williamson approved SS 321 Steel Screw
MARAFIQ approved Stainless Steel 321 Washers
Magnetrol approved 321 Threaded Stud
QATARGAS approved 321 Stainless Steel Allen Cap Screw
ONGC approved Stainless Steel 321 Machine Screws
FW approved Stainless Steel 321 Hexagon Nuts
IBR approved SS 321 Hex Domed Cap Nuts
Alba approved Stainless Steel 321 Stud
Kuwait Oil Company approved 321 U Bolts
Egyptian General Petroleum Corporation approved Stainless Steel 321 Spring Washers
Industry We Serve
Stainless Steel 321 Foundation Bolts in Petrochemical Industry
Structural Bolts in Oil & Gas Industry
ASTM A182 Stainless Steel 321 Anchors in Power Plant
ASTM A276 Stainless Steel 321 Pan Head Screw in Pharmaceuticals Industry
321 SS Hexagonal J Bolts in Chemicals Industry at Oman
SS 321 Hex Domed Cap Nuts in Defence Industry
321 Stainless Steel Square Nut in Food and Beverages Industry
SS 321 Stud Bolts in Sugar Industry
Stainless Steel 321 Head Bolts in Paper Industry
321 Stainless T-Head Bolts in Cement Industry
321 Eye Bolt Dairy Industry
Fasteners in Mining Industry

We Supply Our Stainless Steel 321 Fasteners in Countries like


We are Exports in Exporting SS 321 Fasteners worldwide

We are Exporter of Stainless Steel 321 Fasteners in Worldwide Such as Gambia, Mexico, Nigeria, Greece, Qatar, Belarus, Australia, Sri Lanka, Estonia, Morocco, New Zealand, Argentina, Mongolia, Hungary, Malaysia, Romania, Belgium, Kuwait, United States, Afghanistan, Tibet, Nepal, Canada, Saudi Arabia, Namibia, Norway, Zimbabwe, Chile, Iran, Poland, Kenya, Brazil, Macau, South Korea, Croatia, Egypt, Philippines, Thailand, South Africa, Germany, Libya, Puerto Rico, United Kingdom, Russia, Chile, Sweden, Bulgaria, Indonesia, Israel, Azerbaijan, Bangladesh, Angola, Italy, Finland, Denmark, Peru, Trinidad & Tobago,Tunisia, United Arab Emirates, Iraq, Gabon, Ecuador, Lebanon, Serbia, Bahrain, Colombia, Oman, Yemen, Netherlands, Bhutan, Slovakia, Lithuania, Vietnam, Algeria, Bolivia, Poland, Czech Republic, Spain, Singapore, Nigeria, Switzerland, Costa Rica, Austria, Pakistan, Jordan, Portugal, Japan, France, Ireland, Taiwan, Iran, China, Turkey, Kazakhstan, Mexico, Venezuela, India, Ghana, Hong Kong, Ukraine.

We have supplied of SS 321 Fasteners to following places

We are Suppliers of Stainless Steel 321 Fasteners in India Such as Geoje-si, Rajkot, Ahmedabad, Dallas, Calgary, Lahore, Ulsan, Ernakulam, Kuwait City, Sydney, Nashik, Cairo, Istanbul, Santiago, Madrid, New York, Pimpri-Chinchwad, Howrah, Navi Mumbai, Mexico City, Brisbane, Toronto, Hyderabad, Abu Dhabi, Muscat, Al Jubail, Dubai, La Victoria, Indore, Bengaluru, Perth, Visakhapatnam, Ahvaz, Tehran, Thane, Courbevoie, Milan, Ludhiana, Dammam, Ho Chi Minh City, New Delhi, Bhopal, Noida, Secunderabad, Hong Kong, Al Khobar, Surat, Los Angeles, Granada, Jeddah, Nagpur, Hanoi, Seoul, Port-of-Spain, Houston, Atyrau, Faridabad, Ranchi, London, Petaling Jaya, Chiyoda, Gurgaon, Bogota, Singapore, Chandigarh, Lagos, Baroda, Gimhae-si, Ankara, Thiruvananthapuram, Kuala Lumpur, Moscow, Karachi, Jakarta, Kanpur, Doha, Edmonton, Jaipur, Busan, Colombo, Rio de Janeiro, Pune, Vung Tau, Haryana, Chennai, Montreal, Coimbatore, Aberdeen, Kolkata, Manama, Bangkok, Melbourne, Vadodara, Jamshedpur, Caracas, Sharjah, Algiers, Mumbai, Riyadh.