ASTM A193 / A194 Stainless Steel 321 / 321H Studs

When it comes to fasteners, studs hold a lot of importance. The quality of the stud determines the strength of the entire structure. Stainless steel is a popular material that is used in the production of fasteners. Stainless Steel 321 is a popular material used in exhaust systems, aircraft applications, and other high-temperature environments where corrosion resistance and strength are important. Stainless Steel 321 Stud is a fastener made from this high-quality material. These studs are highly resistant to corrosion and oxidation in high-temperature environments, making them the ideal solution for various industrial applications.

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Stainless Steel 321H Stud is another popular type of fastener made from Stainless Steel 321H, an enhanced version of Stainless Steel 321. These studs are used in high-temperature applications where extreme strength is required. They are also used in power generation, oil and gas, and chemical processing industries. Stainless Steel 321H Studs can handle extreme temperatures due to their high carbon content, which helps to improve their overall strength.
Stainless Steel 321 Stud and Stainless Steel 321H Stud have several benefits that make them the ideal choice for industrial applications. Firstly, both studs are highly resistant to corrosion and oxidation, making them perfect for use in high-temperature environments. Secondly, these studs offer excellent strength and can withstand extreme temperatures. Lastly, their unique properties make them easy to manufacture, which results in lower costs.

Stainless Steel 321 stud and Stainless Steel 321H Stud are made using the same stainless steel 321. However, the difference between them lies in the carbon content. The stainless Steel 321H stud has a higher carbon content than Stainless Steel 321 stud, which makes it stronger and more resistant to high-temperature environments. It’s often used in applications that require more strength and durability.
Stainless Steel 321 Stud and Stainless Steel 321H Stud are two fasteners essential in industrial applications. Both studs are highly resistant to corrosion and oxidation, offer excellent strength, and can withstand extreme temperatures. The major difference is the carbon content, with Stainless Steel 321H stud being stronger and more durable.


Stainless Steel 321 Studs are commonly used in applications that require high-temperature strength & corrosion resistance. They are widely used in aerospace, chemical, power generation & thermal processing. Typical applications include fastening components in exhaust systems, furnace equipment, and high-temperature process piping.

Stainless Steel 321H Studs can withstand temperatures up to approximately 900°C (1650°F). They maintain good mechanical properties & oxidation resistance at high temperatures, making them suitable for applications in heat-intensive environments.

The carbon content is the main difference between Stainless Steel 321 and 321H Studs. Stainless Steel 321H contains a higher carbon content compared to 321. This higher carbon content provides improved high-temperature strength and creep resistance, making it suitable for applications that require enhanced performance at elevated temperatures.

Specification of Stainless Steel 321 / 321H Stud

Spec bag
Spec Stud
Specifications: ASTM A193,A194 / ASME SA193,SA194
Standard: DIN, ASTM, BS and all International Standards
Length: Upto 1 Meters
Stud Size: M3 - M56 | 3/6" to 2" | Custom Sizes
Heat Treatment: Annealing, Stress Relieving, Case Hardening, Quenching and Tempering.

Types of Stainless Steel 321 / 321H Studs

Stainless Steel 321 / 321H Threaded Studs

Stainless Steel 321/ 321H Threaded Stud

  • - ASTM A193 SS 321 Threaded Stud
  • - S32100/S32109 Threaded Stud
  • - 1.4541 / 1.4878 Full Threaded Stud
  • - 321H SS Heavy Threaded Studs
  • - ASME SA194 SS 321H Threaded Stud
  • - SS 321 Half Threaded Studs Supplier
  • - SS 321H Threaded Studs Manufacturer
Stainless Steel 321 / 321H Single End Studs

Stainless Steel 321/ 321H Single End Stud

  • - ASTM A193 SS 321 Single End Stud
  • - S32100/S32109 Single End Stud
  • - 1.4541 / 1.4878 Single End Stud
  • - 321H SS Single End Studs
  • - ASME SA194 SS 321H Single End Stud
  • - SS 321 Single End Studs Supplier
  • - SS 321H Single End Studs Manufacturer
Stainless Steel 321 / 321H Tap End Studs

Stainless Steel 321/ 321H Tap End Stud

  • - ASTM A193 SS 321 Tap End Stud
  • - S32100/S32109 Tap End Stud
  • - 1.4541 / 1.4878 Tap End Stud
  • - 321H SS Tap End Studs
  • - ASME SA194 SS 321H Tap End Stud
  • - SS 321 Tap End Studs Supplier
  • - SS 321H Tap End Studs Manufacturer
Stainless Steel 321 / 321H Double Ended Studs

Stainless Steel 321/ 321H Double Ended Stud

  • - ASTM A193 SS 321 Double Ended Stud
  • - S32100/S32109 Double Ended Stud
  • - 1.4541 / 1.4878 Double Ended Stud
  • - 321H SS Double Ended Studs
  • - ASME SA194 SS 321H Double Ended Stud
  • - SS 321 Double Ended Studs Supplier
  • - SS 321H Double Ended Studs Manufacturer

Equivalent Grades for Stainless Steel 321 / 321H Stud

STANDARD UNS WERKSTOFF NR. EN JIS
321 S32100 1.4541 X6CrNiTi18-10 SUS 321
321H S32109 1.4878 X12CrNiTi18-9 SUS 321H

Stainless Steel 321 / 321H Stud Chemical Composition

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 2.0 1.0 0.045 0.030 17.0 - 19.0 0.10 9.0 - 12.0 5(C+N) – 0.70
SS 321H 0.04 – 0.10 2.0 1.0 0.045 0.030 17.0 - 19.0 0.10 9.0 – 12.0 4(C+N) – 0.70

Mechanical Properties of Stainless Steel 321 / 321H Studs

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Application Industries

  • Refineries
  • Petrochemicals Industry
  • Oil & Gas Industry
  • Mining
  • Construction
  • Pharmaceuticals
  • Automobile