Home > Stainless Steel 321 / 321H Bolts
Request For Our Latest Prices On Stainless Steel 321 / 321H Bolts in Mumbai, India!
The Fasteners Mart, which is located in Mumbai, India, is a fastener manufacturing company and exporter that produces top-notch industrial fasteners designed to perform according to world standards. One of our premium products includes the Stainless Steel 321 / 321H Bolts, made from titanium-stabilized austenitic stainless steel. It comes in a standard hex or custom form with great resistance against high-temperature and intergranular corrosion. Grade 321 is intended for general high-temperature applications, whereas 321H with increased carbon content offers better creep strength, and both grades are appropriate for severe thermal and pressure applications.
Stainless Steel 321 / 321H Bolts consist mainly of chromium (17–19%), nickel (9–13%), titanium (≥5xC%), and carbon (≤0.08% in 321 and up to 0.10% in 321H). Other trace elements are manganese, silicon, and phosphorus. These bolts have tensile strength between 515–750 MPa and 205 MPa yield strength, with a hardness of 201 HB max. The density is about 7.93 g/cm³, and the melting point is between 1398°C to 1510°C, providing reliability in harsh temperature conditions.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 13.0 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347 | 515 | 205 | 40 | 95 | 201 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
321 / 321H Stainless Steel Bolts are best suited for high-temperature industrial usage in heat exchangers, boilers, exhaust systems, and chemical processing plant equipment. They are extensively employed in the petrochemical, aerospace, and marine industries for their superior resistance to oxidation and corrosion under thermal stress. Grade 321 bolts are ideal for intermittent heating applications, whereas 321H bolts are ideal for continuous exposure to high temperatures when more creep strength is needed. These bolts provide firm, stable fastening in extreme conditions.
The Fasteners Mart guarantees timely and secure delivery of Stainless Steel 321 / 321H Bolts around the world. Each bolt is carefully packed in moisture-resistant wrapping, bubble padding, and durable cartons or wooden crates to avoid damage during shipping. Proper labeling for handling and traceability is guaranteed with every shipment.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
©2024 The Fasteners Mart All Rights Reserved.
