Introducing Andre Stainless, your go-to manufacturer and supplier of Stainless Steel 409 Nuts right here in Singapore, Pulau Ujong. We specialize in providing budget-friendly fastening solutions that excel in high-temperature and moderately corrosive settings. SS 409 is a ferritic stainless steel, perfect for automotive and thermal applications, known for its impressive oxidation resistance and solid mechanical properties. At Andre Stainless, we produce 409 nuts in a variety of thread types and sizes, all while meeting international standards like ASTM, DIN, and ISO. These nuts are a fantastic choice for systems that face elevated temperatures and light corrosion, making them popular in the automotive, HVAC, and industrial fields.
When it comes to composition and mechanical properties, Stainless Steel 409 Nuts are made up of 10.5–11.75% chromium, with low carbon content (≤0.08%), and are stabilized with titanium to minimize carbide precipitation and enhance weldability. SS 409 boasts a tensile strength of about 380–550 MPa and a yield strength ranging from 170–275 MPa. This material is magnetic and offers excellent resistance to oxidation and heat scaling, enduring temperatures up to 800–900°C. While its corrosion resistance isn’t as high as that of austenitic grades, it holds up well in mildly corrosive environments, especially where cost-effectiveness and thermal stability take precedence over chemical resistance.
| Material | Specification | Standards | Size | Length |
| Stainless Steel 409 Nut | ASTM, ASME and API | ASTM B 193 / ASME SB 193 | M02 to M30 | 3 mm To 200 mm |
| Element | Content |
|---|---|
| Carbon | 0.08 maximum |
| Manganese | 1.00 maximum |
| Phosphorus, maximum | 0.045 maximum |
| Sulfur, maximum | 0.045 maximum |
| Silicon | 1.00 maximum |
| Nickel | 0.5 |
| Chromium | 11.75 |
| Molybdenum | – |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 450 |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 240 |
| Elongation in 4D (El) | 25% min |
| Reduction | – |
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Stainless steel 409 nuts are ideal for high temperature applications. Available in sizes from M6 to M36, they are commonly used in automotive exhaust systems, heat exchanger systems and furnace components to provide durability and moderate corrosion resistance.
The stainless steel 409 coupling nuts are designed to connect the threaded rods in a high temperature environment. Sizes range from M6 to M36, making them perfect for use in automotive and industrial systems that require a combination of durable and durable components.
Featuring a nylon insert for a secure fastening, stainless steel 409 nylon insert nuts are available in sizes from M6 to M24. They offer high strength and moderate corrosion resistance, suitable for automotive and industrial applications.
Stainless steel 409 flange hex nuts for enhanced weight distribution with integrated flange. Available in sizes from M6 to M24, they are ideal for heavy duty vehicles and industrial applications that require durability.
Heavy duty stainless steel 409 heavy hex nuts are designed for high stress environments. Available in sizes from M6 to M36, these nuts are used in industrial machinery and automotive systems requiring high strength and moderate corrosion resistance.
Stainless steel 409 square nuts provide large surface area for efficient torque application. Sizes range from M6 to M24, making them suitable for secure bonding in industrial environments with corrosive softness.
We take great care in packing and shipping our Stainless Steel 409 Nuts securely. Usually, a wooden box with strips is used to secure the nuts, which are packaged in waterproof material. For easy transport, they also feature a lifting point. The documents must be a commercial invoice, certificate of origin, fumigation certificate, heat treatment chart, quality assurance plan, and material testing certificates. In fact, our goal is to get these products into our customers in perfect condition and on time, which guarantees full satisfaction on their part.
Stainless Steel 409 Nuts find their primary use in automotive exhaust systems, mufflers, manifolds, and heat shields, where high-temperature resilience is crucial. They’re also utilized in HVAC equipment, industrial furnaces, flue gas systems, and light-duty structural assemblies that experience thermal stress. These nuts are perfect for bolted joints in settings where oxidation and scaling are concerns, but extreme corrosion resistance isn’t a must. Andre Stainless offers SS 409 nuts in both standard and custom sizes, catering to the needs of automotive manufacturers, mechanical engineers, and fabricators with reliable fastening solutions.
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