Stainless Steel 321 and 321H are austenitic stainless steels known for their excellent corrosion resistance and high-temperature strength. These alloys are commonly used in applications where elevated temperatures and corrosive environments are prevalent, such as in the manufacturing of chemical processing equipment, heat exchangers, and aircraft components. To ensure the structural integrity of assemblies in such demanding conditions, the use of high-quality fasteners is crucial, and Stainless Steel 321/321H Fasteners emerge as a reliable solution.
Chemical Composition: Stainless Steel 321 is a stabilized austenitic stainless steel containing titanium, which provides enhanced resistance to intergranular corrosion. The main difference between 321 and 321H lies in their carbon content, with 321H having a higher carbon content for improved high-temperature strength.
Table Of Content
Key Features:
Corrosion Resistance: These fasteners exhibit excellent corrosion resistance,
making them suitable for use in aggressive chemical environments.
High-Temperature Strength: Stainless Steel 321/321H Fasteners maintain their
mechanical properties at elevated temperatures, offering reliable performance in heat-intensive
applications.
Stability: The titanium stabilization in 321 prevents sensitization during welding,
reducing the risk of intergranular corrosion.
Applications: Stainless Steel 321/321H Fasteners find applications
in various industries, including:
Chemical Processing: SS 321 Fasteners are Ideal for equipment subjected to
corrosive chemicals and high temperatures.
Aerospace: Stainless Steel 321H Fasteners are used in the construction of aircraft
components and engines due to their heat resistance.
Heat Exchangers: Stainless Steel 321 Fasteners are commonly employed in the
assembly of heat exchanger units for efficient heat transfer.
ASTM A193, A194 / ASME SA193, SA194
DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
M3 - M100 | 3/6″ - 4″ | Custom Sizes
DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
UNF, BSW, BSF, METRIC, UNC, or as required
ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Hex, Threading, Square, Round as per Gauge Etc.
Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| 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 % |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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