Semih Metals, located in Istanbul, Turkey, has built a solid reputation as a reliable manufacturer and supplier of top-notch Alloy Steel AISI 4340 Bars and Rods. They cater to a wide range of industrial needs across the globe. These bars are celebrated for their durability, precision, and outstanding metallurgical properties, making them a go-to choice for high-performance applications in tough environments. With cutting-edge facilities and a strong commitment to international quality standards, Semih Metals guarantees that their AISI 4340 Bars and Rods provide exceptional strength, toughness, and reliability. They serve various sectors, including automotive, aerospace, oil and gas, and heavy machinery, supplying materials that meet rigorous engineering and application specifications.
The Alloy Steel AISI 4340 Bars and Rods are primarily made up of nickel, chromium, and molybdenum, with carbon content that boosts their hardness and strength. This unique blend results in remarkable toughness, high tensile strength, and excellent wear resistance. They also showcase impressive fatigue resistance, impact strength, and hardenability, making them ideal for heat treatment processes. Their mechanical properties include a tensile strength of up to 1080 MPa, yield strength around 850 MPa, and good elongation. The perfect balance of toughness and strength makes AISI 4340 one of the most dependable alloy steels for heavy-duty applications.
| Sizes | 2-100mm A/F |
|---|---|
| Tolerance | H9, H8, H10, K12, H13K9, K10, H11, H12, K11 |
| Round bar Sizes | Diameter: 3-~800mm |
| Technique | Hot Rolled, Cold Drawn, Cold Rolled, Forged, Rod |
| Processing | Bar cutting to 650mm |
| Surface | Bright, Hot Rolled Pickled, Sand Blasting Finished, Hairline, Cold Drawn, Polished suppliers |
| Condition | Hardened and tempered, annealed |
| Form | Precision Square, Ingot, T-Bar, Rod, Round, Welding Rod, I/H Bar, Flat Bar, Blocks, Rings, Rectangle, Hex (A/F), Hollow, Threaded, Profiles, Ground Bar, Channel Bar, Billet, Triangle, Round Rod, Half Round Bar, Forging etc. |
| Square bar Sizes | 4 to 100mm |
| Finish | Hot rolled annealed, Bright, smooth turned, Polish, Rough Turned, Cold (bright) drawn, centreless ground, Grinding, peeled, hot rolled, slit rolled edge, Centreless Ground & Black. |
| Flat bar Sizes | Width: 10 – 500 millimeter Thick.: 2 to 100 millimeter |
| Element | Composition |
|---|---|
| C% | 0.38/0.43 |
| Mn% | 0.60/0.80 |
| P% | 0.035 max |
| S% | 0.040 max |
| Si% | 0.20/0.35 |
| Ni% | 1.65/2.00 |
| Cr% | 0.70/0.90 |
| Mo% | 0.20/0.30 |
| Property | Value |
|---|---|
| Tensile Strength | 850-1000 N/mm 2 |
| Elongation | 13% |
| Hardness | 250-350 HB |
Alloy Steel AISI 4340 is commonly used in aerospace, automotive, and heavy machinery applications due to its excellent strength, toughness, and fatigue resistance. It's ideal for manufacturing shafts, gears, and structural components.
AISI 4340 offers high tensile strength, excellent toughness, and good wear resistance. It is known for its ability to withstand high-stress and high-impact conditions.
Yes, AISI 4340 can be heat-treated to enhance its hardness and strength, making it highly adaptable for different engineering requirements.
These Alloy Steel AISI 4340 Bars and Rods are widely utilized in industries that demand high-strength materials with exceptional fatigue resistance. Typical applications include aircraft landing gear, automotive parts, crankshafts, shafts, axles, gears, and connecting rods. In the oil and gas sector, they are essential for drill collars, tool joints, and other heavy-duty equipment that endure extreme pressure. Their reliability and performance also make them suitable for power generation, defense, and marine engineering. With their versatility, toughness, and stress resistance, they are crucial for critical components in challenging engineering environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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