Harsh Metalloys, based in Mumbai, India, has built a solid reputation as a manufacturer and supplier of Stainless Steel 440C Fasteners. These fasteners are celebrated for their remarkable hardness, wear resistance, and decent corrosion resistance. Grade 440C is a high-carbon martensitic stainless steel that can be heat-treated, making it a go-to choice for applications where strength and durability are paramount. Our range includes bolts, nuts, screws, washers, and studs, all available in various sizes and configurations to comply with ASTM and international standards. SS 440C fasteners find extensive use in the aerospace, automotive, tooling, and bearing industries, ensuring reliable performance in high-stress mechanical assemblies and precision equipment.
Stainless Steel 440C Fasteners are made up of 16–18% Chromium and 0.95–1.20% Carbon, which grants them exceptional hardness and strength after heat treatment. They also include trace amounts of Manganese, Silicon, and Molybdenum. With a tensile strength that can exceed 760 MPa and a Rockwell hardness of up to 58 HRC, these fasteners are tough. While they may not be as corrosion-resistant as austenitic grades, they still perform well in mildly corrosive environments. Their impressive wear resistance and mechanical strength make them perfect for applications that demand precision and durability, especially in situations involving heavy loads, impacts, and abrasives.
Specification : ASTM A193 / ASME SA193
Dimensions : ASME B18.2.1, ASME B18.3, DIN 931, DIN 933, DIN 934, DIN 7991, DIN 976
Standard : DIN, GB, BS, ISO, IS, JIS, ASTM, ASME, EN, etc.
Size : M02 to M33
Length : 3 mm to 200 mm
Threads : ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Types : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts.
| Grade | C | Mn | Si | P | S | Cr | |
| 440C | min. | 0.95 – 1.20 | – | – | – | – | 16.0 |
| max. | 0.12 | 1.0 | 1.00 | 0.04 | 0.030 | 18.0 | |
| 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 | ||||
| 440C | 758 | 448 | 14 | 95 | – |
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These nuts offer high corrosion resistance and excellent strength due to the high carbon content in 440c stainless steel. They are available in sizes ranging from M3 to M48 and meet various industrial standards for dimensions and tolerances.
440c Stud Bolts provide exceptional corrosion resistance and high tensile strength. They come in diameters from M6 to M30 and lengths from 50mm to 1000mm, suitable for demanding applications requiring precision and durability.
440c Bolts are ideal for harsh environments and offer superior corrosion resistance and high strength. They are available sizes from M5 to M36, with varying lengths and thread specifications to meet diverse application needs.
These threaded rods are known for their excellent corrosion resistance and high tensile strength. They are typically available in diameters from M6 to M30 and lengths up to 3000mm, suitable for use in various industrial settings.
440c screws provide robust corrosion resistance and high strength. Commonly available in sizes from M3 to M20, lengths varying based on application needs, they are ideal for precision and heavy-duty fastening tasks.
440C washers offer outstanding corrosion resistance and durability, making them ideal for distributing loads and protecting surfaces. They are available in sizes from M3 to M36 and come in various thicknesses to meet specific application needs. Their robust properties ensure reliable performance in demanding environments.
At Harsh Metalloys we ensure that our Stainless Steel 440C Fasteners undergo rigorous quality tests, including Hardness Test, PMI Testing, Chemical Analysis, and IGC Test, to guarantee excellence. We provide detailed documentation such as invoices with HS codes, packaging lists, Certificates of Origin, and Guarantee Letters. Additionally, Third-Party Inspection Certificates ensure complete client satisfaction and reliability.
Stainless Steel 440C Fasteners are widely used in applications demanding high wear resistance, strength, and dimensional stability. Common industries include aerospace, automotive, surgical instruments, and high-performance tooling. These fasteners are ideal for use in bearings, valve components, pump parts, gears, and dies where mechanical stress and friction are intense. They are also found in marine hardware and instrumentation where hardness is prioritized over corrosion resistance. Their ability to retain sharp edges and resist deformation under load makes them perfect for critical applications in both industrial and high-precision environments.
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