결혼 300
Maraging 300 is the most widely used grade in the maraging family. It provides an exceptional nominal yield strength of 300,000 psi (2068 MPa) while maintaining sufficient ductility for complex aerospace applications. It is an 18% nickel, cobalt-molybdenum steel.
- 공통 양식: Round Bar, Forged Billet, Plate.
- 주요 기능: Ideal balance of extreme strength and functional ductility.
- Heat Treatment: Low-temperature aging with minimal distortion.
- 순도: Typically supplied as Double Melted (VIM-VAR).
Maraging 300 is the "Gold Standard" for ultra-high-strength applications. While harder than Maraging 250, it retains enough fracture toughness to be used in critical rotating components and structural aerospace parts. Its unique chemistry allows it to be machined in the annealed condition and then hardened with virtually no dimensional change.
Ultra-High Strength
Achieves tensile strengths exceeding 300 ksi, significantly higher than conventional high-strength steels like 4340 or 300M.
Dimensional Stability
The aging process (900°F) causes negligible size change, allowing parts to be finished to tolerance before heat treatment.
Nitriding Capability
Can be nitrided to achieving high surface hardness for wear resistance, useful in gear and transmission applications.
| 요소 | 콘텐츠(%) |
|---|---|
| 니켈(Ni) | 18.0 - 19.0 |
| 코발트 (Co) | 8.5 - 9.5 |
| 몰리브덴(Mo) | 4.6 - 5.2 |
| 티타늄(Ti) | 0.5 - 0.8 |
| 알루미늄(Al) | 0.05 - 0.15 |
| 철(Fe) | 잔액 |
*Note: Increased Titanium content vs. Maraging 250 provides the higher strength levels.
| 제품 양식 | 표준(AMS / ASTM / MIL) |
|---|---|
| 바, 단조품 | AMS 6514 |
| 플레이트, 시트, 스트립 | AMS 6521 |
| 군용 사양 | MIL-S-46850 유형 IV |
| 화학 컴포넌트 | ASTM A538 (Grade B) |
| 속성 | 일반값(실내 온도) |
|---|---|
| 항복 강도(0.2% 오프셋) | 290 - 300 ksi (2000 - 2068 MPa) |
| 궁극의 인장 강도 | 300 - 315 ksi (2068 - 2172 MPa) |
| 신장 | 7 - 10 % |
| 면적 감소 | 40 - 50 % |
| 경도(로크웰 C) | 53 - 55 HRC |
| 골절 인성(KIC) | ~60 ksi√in |
*Note: Properties achieved after aging at 900°F (482°C) for 3-6 hours.
Aerospace Structural Components
Landing gear components, flexure shafts, and structural members requiring high strength-to-weight ratios.
모터스포츠
High-performance racing crankshafts, gears, and connecting rods subjected to extreme cyclic loading.
High Speed Rotors
Industrial gas centrifuges and flywheel energy storage systems requiring dimensional integrity at high RPMs.
Rocket Motor Cases
Pressure vessels and casings for solid-fuel propulsion systems.
Need Maraging 300?
We supply premium quality Maraging 300 (VIM-VAR) in a wide range of bar sizes and plates. Material is fully certified to AMS and MIL specifications.
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