マレージング350
Maraging 350 offers the highest strength of the 18% nickel maraging steel family. It is an ultra-high-strength steel that contains Cobalt and Molybdenum, and higher Titanium content than the 300 grade. It provides a nominal yield strength of 350,000 psi (2415 MPa).
- 一般的なフォーム： Round Bar, Forged Billet.
- 主な特徴 Extreme Yield Strength (350 ksi).
- Hardness: Up to 57-60 HRC after aging.
- Compromise: Lower toughness than 250 or 300 grades.
Select Maraging 350 when your design demands the absolute maximum tensile and yield strength available in a maraging alloy. While it sacrifices some fracture toughness compared to the 300 grade, its ability to withstand massive centrifugal forces and compressive loads makes it indispensable for specialized high-performance equipment.
エクストリーム・ストレングス
Achieves yield strengths of 350,000 psi, making it one of the strongest structural metals available.
High Hardness
Can be age-hardened to approximately 57-60 Rockwell C, providing excellent resistance to surface wear and deformation.
Heat Resistance
Maintains substantial strength up to 800°F (427°C), allowing it to perform in high-stress, high-temperature environments.
| エレメント | コンテンツ（%） |
|---|---|
| ニッケル（Ni） | 18.0 - 19.0 |
| コバルト | 11.5 - 12.5 |
| モリブデン (Mo) | 4.6 - 5.2 |
| チタン（Ti） | 1.3 - 1.6 |
| アルミニウム（Al） | 0.05 - 0.15 |
| 鉄（Fe） | バランス |
*Note: The significantly higher Titanium and Cobalt levels drive the strength increase over Grade 300.
| 製品形態 | Standards (AMS / ASTM / MIL) |
|---|---|
| 棒材、鍛造品 | AMS 6515 |
| Military Spec | MIL-S-46850 Type IV |
| Chemical Comp | ASTM A538 (Grade C) |
| プロパティ | 代表値（室温） |
|---|---|
| 降伏強さ（0.2%オフセット） | 340 - 360 ksi (2344 - 2482 MPa) |
| Ultimate Tensile Strength | 350 - 370 ksi (2415 - 2550 MPa) |
| 伸び | 6 - 8 % |
| 面積の縮小 | 30 - 40 % |
| 硬度（ロックウェルC） | 57 - 60 HRC |
| Fracture Toughness (KIC) | ~40 ksi√in |
*Note: Properties achieved after aging at 900-925°F for 6-12 hours.
Gas Centrifuges
Ultra-high-speed rotors for isotope separation requiring extreme tensile strength and balance.
Rocketry
Solid propellant motor cases and structural components where weight savings are critical.
Tooling & Dies
Core pins and extrusion dies for aluminum and zinc casting that require high hot hardness.
Flywheels
Kinetic energy storage systems operating at extreme RPMs.
Need Maraging 350 Steel?
We supply high-quality Maraging 350 bar and billet. Due to the critical nature of this material, full mill certification is provided.
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