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Smith Fittings is a top-notch manufacturer and supplier located in Canberra, Australia, specializing in high-quality **4340 Steel Sheets and Plates** that are celebrated for their remarkable strength, toughness, and resistance to fatigue. Designed to meet stringent industry standards, these steel sheets and plates deliver reliable performance in tough structural and mechanical applications. With a commitment to precision manufacturing and rigorous quality control, Smith Fittings provides products that blend durability with consistent mechanical properties. Catering to sectors like aerospace, automotive, heavy engineering, and defense, the company offers trustworthy **4340 Steel Sheets and Plates** that shine in high-stress, high-load, and critical engineering environments.
**4340 Steel Sheets and Plates** are alloy steels primarily made up of iron, nickel, chromium, and molybdenum, with trace amounts of carbon, manganese, and silicon to boost strength and toughness. They boast a tensile strength of around 745–1080 MPa and a yield strength between 470–670 MPa. This alloy is known for its excellent fatigue resistance, impact toughness, and hardenability, along with good weldability and machinability. **4340 Steel Sheets and Plates** are perfect for applications that demand high strength, durability, and resistance to dynamic and cyclic loading.
| Specification | ASTM A829 / ASTM A6, SAE J404, AMS 6359/ 2252/2301 |
| Grade | AISI 4340/ EN24 |
| Value Added Services |
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| Silicon | 0.15/0.35 |
| Chromium | 0.70/0.90 |
| Molybdenum | 0.20/0.30 |
| Carbon | 0.38/0.43 |
| Manganese | 0.65/0.85 |
| Phosphorus | 0.025 max. |
| Sulfur | 0.025 max. |
| Nickel | 1.65/2.00 |
| Copper | 0.35 max. |
| Alloy | Thickness Range | Condition/ Temper | Specification | Tensile Strength Ksi | Yield Strength Ksi |
AISI 4340 | 3/8 Inch to 8-1/8 Inch | STRESS RELIEVED | ASTM A829 / ASTM A6 SAE J404 | – | – |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
4340 steel sheet and plate offers many advantages including superior hardness, strength, and resistance to fatigue and fatigue. This compound is known for its high tensile strength and excellent performance in harsh conditions. It is highly weldable, allowing versatility in design and manufacturing. Also, 4340 steel exhibits good strength, which improves the performance of the heat treated product. These properties make it ideal for use in the aerospace, automotive, and heavy machinery industries, where durability and reliability are essential.
These **4340 Steel Sheets and Plates** find extensive use in industries that require high-performance structural and mechanical components. In aerospace, they are commonly used for landing gear, aircraft structural parts, and engine components. In the automotive and heavy machinery sectors, they serve as crankshafts, gears, shafts, and axles. Additionally, this steel is employed in defense applications for armor plates and military gear, thanks to its outstanding toughness and fatigue resistance. **4340 Steel Sheets and Plates** are ideal for components that face high stress, cyclic loads, and challenging operational conditions, ensuring long-lasting reliability and safety.
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