Latrobe,Marvac 300 VIM-VAR ; RCS High Strength Maraging Steel Seamless tube

Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Seamless tube Product Information -:- For detailed product information, please contact sales. -: Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Seamless tube Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** Latrobe Marvac 300 VIM-VAR ; 5 RCS **Product Form:** Premium Vacuum Melted Rounds (5-inch RCS - Round Cornered Square, or as specified) **Material Type:** Ultra-High-Strength Maraging Steel --- ### **1. Overview** Latrobe Marvac 300 VIM-VAR in a 5 RCS form is a premium-grade, ultra-high-strength maraging steel produced via a dual vacuum melting process: Vacuum Induction Melting (VIM) followed by Vacuum Arc Remelting (VAR). This stringent melting regimen guarantees exceptional metal purity, minimal non-metallic inclusions, and superior structural homogeneity. Designed to achieve a nominal yield strength of 300 ksi (2068 MPa) after aging, it offers an outstanding combination of strength, toughness, and good fabrication characteristics, making it ideal for the most demanding aerospace, defense, and high-performance applications. ### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Element | Content (%) | |---------|------------|---------|------------| | **Iron (Fe)** | Balance | **Cobalt (Co)** | 8.0 - 9.0 | | **Nickel (Ni)**| 18.0 - 19.0 | **Molybdenum (Mo)**| 4.0 - 5.0 | | **Titanium (Ti)**| 0.5 - 0.8 | **Aluminum (Al)**| 0.05 - 0.15 | | **Carbon (C)** | ≤ 0.03 | **Manganese (Mn)**| ≤ 0.10 | | **Silicon (Si)**| ≤ 0.10 | **Sulfur (S)** | ≤ 0.01 | | **Phosphorus (P)**| ≤ 0.01 | **Boron (B)** | ≤ 0.003 | | **Zirconium (Zr)**| ≤ 0.01 | **Calcium (Ca)** | ≤ 0.05 | **Note:** The composition is meticulously controlled to optimize the aging response and maximize hardenability while ensuring excellent ductility and toughness. ### **3. Physical & Mechanical Properties** *Typical values for material in the peak-aged condition (aged at 480°C / 900°F for 3-5 hours).* - **Tensile Strength:** 300 - 310 ksi (2068 - 2137 MPa) - **Yield Strength (0.2% Offset):** 290 - 300 ksi (1999 - 2068 MPa) - **Elongation:** 10 - 12% - **Reduction in Area:** 50 - 55% - **Hardness:** 52 - 54 HRC - **Fracture Toughness (K_IC):** > 80 ksi√in (typical) - **Modulus of Elasticity:** ~ 28.5 x 10⁶ psi (196 GPa) - **Density:** 0.290 lb/in³ (8.03 g/cm³) - **Melting Point:** Approximately 1440°C (2625°F) ### **4. Key Characteristics** - **Unmatched Strength & Toughness Combination:** Delivers ultra-high strength without compromising fracture toughness. - **Superior Metallurgical Purity:** VIM-VAR processing drastically reduces gas content (O₂, H₂, N₂) and inclusions, leading to enhanced fatigue performance and reliability. - **Excellent Fabricability:** Easily machined, formed, and welded in the soft, solution-annealed condition (typically 28-32 HRC), then simply aged to achieve full strength with minimal distortion. - **Good Dimensional Stability:** Exhibits minimal volume change or warping during the low-temperature aging process. - **High Stress-Corrosion Cracking Resistance:** Superior to many other ultra-high-strength steels. ### **5. Product Applications** This high-integrity material is specified for critical, performance-driven components where failure is not an option: - **Aerospace:** Primary airframe structures, landing gear components (axles, pistons), rocket motor cases, helicopter rotor hubs, and missile airframes. - **Defense:** Armor-piercing penetrators, torpedo components, lightweight armored vehicle parts, and critical fasteners for military platforms. - **High-Performance Motorsports:** Formula One connecting rods, transmission gears, and suspension components where weight savings and strength are paramount. - **Tooling:** High-pressure die-casting cores and inserts, plastic injection molds requiring high hardness and thermal fatigue resistance. - **Specialty Engineering:** High-load pins, shafts, and actuators in oil & gas, and racing sailboat components. ### **6. International Standards & Specifications** This product complies with leading international aerospace and material standards: - **AMS (Aerospace Material Specification):** AMS 6512 ("Maraging Steel, 18.5Ni-9.0Co-4.9Mo-0.60Ti, Vacuum Melted, 300 ksi (2068 MPa) Yield Strength") - **ASTM (American Society for Testing and Materials):** ASTM A579 (Standard Specification for Superstrength Alloy Steel Forgings) - **U.S. Military Standard:** MIL-DTL-46850 (Maraging Steel, 18 Percent Nickel Alloy) - **European Standards:** Can be supplied to equivalent specifications such as proprietary requirements from **Airbus, Boeing, Rolls-Royce**, or in accordance with **EN (EuroNorm)** guidelines for similar grades. ### **7. Available Forms & Processing** - **Form:** 5-inch RCS (Round Cornered Square) – a square cross-section with rounded corners, often preferred for forging stock or specific machining applications. Other sizes and forms (rounds, billets) are available. - **Standard Condition:** Supplied in the **solution annealed** condition (815-830°C / 1500-1525°F, air cool), ready for machining. - **Final Heat Treatment:** After fabrication, components are aged at **480°C (900°F) for 3-5 hours** to achieve the full ultra-high-strength properties. ### **8. Why Choose Latrobe Marvac 300 VIM-VAR?** As a product of **Latrobe Specialty Metals**, a world leader in premium melt technology, this material guarantees batch-to-batch consistency and traceability. The VIM-VAR process is key to achieving the superior **transverse ductility and toughness** essential for highly stressed, critical rotating or structural components. Choosing this grade ensures performance, safety, and reliability in the most extreme operating environments. --- **Disclaimer:** The information provided is for general reference. Final material properties are dependent on the specific heat treatment cycle and processing history. For design and procurement, always consult the latest official material datasheets and certify against the required purchase specification. -:- For detailed product information, please contact sales. -: Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7379 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Seamless tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Seamless tube -:- For detailed product information, please contact sales. -:

Packing of Latrobe Marvac 300 VIM-VAR ; 5 RCS High Strength Maraging Steel Seamless tube -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Seamless tube drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3850 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition