Semih Metals, located in Istanbul, Turkey, is a reliable manufacturer and supplier of Maraging Steel Bars and Rods. They specialize in high-strength alloy steel products that are designed for outstanding mechanical performance, toughness, and dimensional stability. Crafted with precision and under strict quality control, these bars and rods boast an excellent surface finish, precise dimensions, and dependable mechanical properties. Semih Metals guarantees that its Maraging Steel Bars and Rods fulfill the rigorous demands of industries like aerospace, defense, tooling, and high-performance engineering, where ultra-high strength, minimal distortion, and reliability in extreme conditions are crucial.
The composition of Maraging Steel Bars and Rods primarily includes iron, nickel (around 18%), cobalt (approximately 8–12%), molybdenum (about 3–5%), and titanium (roughly 0.2–0.5%), along with some trace elements. This distinctive blend enables the steel to achieve remarkable tensile strength and hardness after undergoing aging heat treatment, all while maintaining ductility. In terms of mechanics, maraging steel showcases impressive yield strength, tensile strength, toughness, and fatigue resistance, making it ideal for precision components that face high stress and dynamic loads.
| Standard : | AMS, AMS, API |
| Specification : | ASTM A538, AMS 6512, Mil-S-46850D, BS S162, DTD 5212, MSRR 6551, MAT 102, MIA 101 |
| Size : | 20mm x 1200 x 500 |
| Specialize Sheets : | Shim, Perforated Sheet, B. Q. Profile. |
| Finish : | Cold rolled sheet (CR), 2D, Hot rolled plate (HR), 2B, BA NO(8), SATIN (Met with Plastic Coated) |
| Hardness : | Quarter Hard, Soft, Hard, Half Hard, Spring Hard etc. |
| Grade : | Maraging Steel 250/ 300 / 350 (UNS-K92890, K93120, S35000) |
| Grade | C | Mn | Si | Co | Fe | Ni | Mo | Ti | Al |
| Maraging C250 | .03max max | .10max max | .10max max | 7.50 max | Bal | 18.50 min | 4.80 max | .40 max | .10 max |
| Maraging C300 | .03max max | .10max max | .10max max | 9.0 max | Bal | 18.50 min | 4.80 max | .60 max | .10 max |
| Maraging C350 | .03max max | .10max max | .10max max | 12.0 max | Bal | 18.50 min | 4.80 max | 1.40 max | .10 max |
| Grade | Density | Average Coefficient of Thermal Expansion | Modulus of Elasticity |
| Maraging 250 | .289 lbs./cu.in | 5.6 x 10-6 in./ in./ ºF | 5.6 x 10-6 in./ in./ ºF |
| Maraging 300 | .289 lbs./cu.in | .289 lbs./cu.in | 292 lbs./cu.in |
| Maraging 350 | .289 lbs./cu.in | 6.3 x 10-6 in./ in./ ºF | 29.0x 10-6 psi |
| STANDARD | UNS | Material No | AMS | ASTM | Mil-S | BS | DTD | MSRR |
| Maraging Steel | K92890, K93120, S35000 | – | 6512 | A538 | 46850D | S162 | 5212 | 6551 |
Maraging Steel Rods are typically available in sizes ranging from 0.125 inches (3.175 mm) to 12 inches (305 mm) in diameter, with lengths varying from 12 inches (300 mm) to 20 feet (6 meters).
Yes, Maraging steel bars can be welded, but they require careful control of heat input and pre/post-weld heat treatment to avoid compromising the material’s strength and toughness.
Maraging steel rods are typically available in diameters ranging from 0.25 inches to 8 inches. Common finishes include cold drawn, polished, or ground, with standard lengths between 12 and 24 feet.
These Maraging Steel Bars and Rods find extensive use in industries that demand ultra-high strength and dimensional stability. They’re commonly utilized in aerospace components, rocket motor casings, high-performance gears, shafts, and tooling for die casting and injection molding. Furthermore, they play a vital role in defense equipment, precision instruments, and high-load structural parts where strength, toughness, and fatigue resistance are essential. With their exceptional blend of mechanical strength, toughness, and reliability, Maraging Steel Bars and Rods deliver long-lasting performance in advanced engineering, aerospace, and defense applications.






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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