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Aaron Sheets & Plates is a leading manufacturer and supplier of high-quality sheet and plate products, specializing in 4340 steel. Known for exceptional precision and durability, their 4340 steel sheets and plates are ideal for heavy-duty applications across the aerospace, automotive, and construction industries. With a strong commitment to excellence, Aaron Sheets & Plates consistently delivers reliable, high-performance solutions that meet the highest standards of quality.
4340 steel is a high-strength alloy steel renowned for its exceptional strength, toughness, and fatigue resistance. Its composition primarily includes carbon (0.38–0.43%), chromium (0.70–0.90%), nickel (1.65–2.00%), and molybdenum (0.20–0.30%), along with smaller amounts of manganese, silicon, sulfur, and other elements. This alloy exhibits impressive mechanical properties, including a tensile strength of 745–850 MPa, yield strength of 415–725 MPa, and elongation of 18–22%. After heat treatment, its hardness typically ranges from 28 to 34 HRC. These characteristics make 4340 steel an excellent choice for demanding applications such as aircraft components, gear shafts, and other high-stress mechanical parts.
| 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.
4340 steel sheet and plate is widely utilized in high-pressure and high-stress applications due to its exceptional hardness, strength, and wear resistance. Commonly found in the aerospace, automotive, and oil and gas industries, 4340 steel is ideal for manufacturing gears, shafts, crankshafts, and components for heavy machinery. Its superior mechanical properties also make it well-suited for high-performance construction parts, pressure vessels, and equipment that require outstanding strength, fatigue resistance, and shock tolerance. Typically heat treated to achieve optimal hardness and durability, 4340 steel is a preferred material for demanding engineering applications.
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