Harsh Metalloys is a reputable manufacturer and supplier of Stainless Steel 253 MA Fasteners, based in Mumbai, India. This particular grade, 253 MA (UNS S30815), is a high-temperature austenitic stainless steel known for its outstanding oxidation resistance and strength at elevated temperatures, reaching up to 1150°C. These fasteners are designed to withstand extreme conditions, offering a perfect blend of heat resistance, toughness, and durability. Harsh Metalloys provides a variety of 253 MA fasteners—including bolts, nuts, washers, studs, and screws—in different sizes and threading options, all adhering to ASTM, DIN, and ISO standards. They are particularly well-suited for use in furnaces, heat treatment processes, petrochemical plants, and power generation systems.
Stainless Steel 253 MA Fasteners are mainly made up of 20–22% chromium and 10–12% nickel, with small amounts of cerium (~0.05%) and nitrogen (~0.15%) added to boost their high-temperature strength and oxidation resistance. These fasteners boast a tensile strength of about 600 MPa, a yield strength of 310 MPa, and an elongation of 40%, along with impressive creep resistance. The alloy develops a stable oxide layer at high temperatures, ensuring long-lasting durability. 253 MA fasteners maintain their mechanical integrity even under thermal cycling and oxidizing conditions, making them an excellent choice for high-temperature structural applications.
| Specifications | ASTM A193 ASME SA193 / ASTM F593, F594, F1554 / ASME SF593, F594, F1554 |
| Standard | DIN, ASTM, BS and all International Standards |
| Bolts Size | 3 mm to 200 mm | Custom Sizes |
| Nut Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Screw Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Machine Screws Size | M1.6 – M12 | Custom Sizes |
| Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Fasteners Type | Nut, Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw, Pan Head Screw, Socket Head Cap Screw, Wing Screw, T-Head Bolts, Foundation Bolts,Screw, Studs, Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts,Eye Bolt,Structural Bolts, Bolts, Nuts, Sockets, Screws, Allen Cap screw |
| Grade | C | Mn | Si | S | Ce | Ni | Cr | P |
| 253 MA | 0.05 – 0.10 | 0.80 max | 1.40 – 2 | 0.030 max | 0.03 – 0.08 | 10 – 12 | 20 – 22 | 0.040 max |
|
Tensile Str (MPa) min |
Yield Str 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
|
Rockwell B (HR B) max |
Brinell (HB) max |
|||
|
600 |
310 |
40 |
95 |
217 |
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Stainless Steel 253 MA nuts offer exceptional corrosion resistance, especially in high-temperature environments. Common sizes range from M6 to M64, with varying dimensions according to industry standards. These nuts are ideal for applications requiring resistance to oxidative and carburizing environments.
Stainless Steel 253 MA stud bolts provide excellent corrosion resistance and high-temperature stability. They are typically available in sizes ranging from M6 to M30 and lengths from 50 mm to 300 mm. They are used in high-stress, high-temperature applications where durability is crucial.
Stainless Steel 253 MA bolts resist corrosion and maintain strength at elevated temperatures. They are commonly available in sizes from M6 to M100, with lengths varying from 20 mm to 200 mm. It is ideal for high-temperature and corrosive environments.
Stainless Steel 253 MA threaded rods offer superior corrosion resistance and high-temperature performance. Standard sizes include diameters from M6 to M30 and lengths up to 1000 mm. Suitable for heavy-duty applications where reliable performance is essential.
Stainless Steel 253 MA screws provide robust corrosion resistance, particularly in harsh environments. Sizes typically range from M4 to M20, with lengths from 10 mm to 150 mm. They are used in applications requiring high-temperature strength and durability.
Stainless Steel 253 MA washers exhibit excellent corrosion resistance and high-temperature endurance. They are generally available in diameters from 6 mm to 100 mm, varying thicknesses according to specific requirements. It is essential for providing a reliable sealing surface and load distribution.
Stainless Steel 253 MA Fasteners are a go-to choice in various high-demand settings like industrial furnaces, kilns, heat exchangers, combustion chambers, and radiant tubes, where it’s crucial to maintain performance at high temperatures. They’re also perfect for use in refineries, petrochemical plants, cement kilns, and boiler components, thanks to their impressive oxidation resistance and strength when things heat up. These fasteners handle the challenges of thermal cycling and exposure to carburizing or oxidizing gases with ease. In the power and metallurgical sectors, SS 253 MA fasteners provide a long service life and maintain their shape, even in the harshest conditions, making them essential for high-performance thermal and structural assemblies.
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