ATI Allvac® VascoMax® C-300 Specialty Steel Flange

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ATI Allvac® VascoMax® C-300 Specialty Steel Flange, Heat Treatment: 927°C (1700°F) + Age Product Information -:- For detailed product information, please contact sales. -: ATI Allvac® VascoMax® C-300 Specialty Steel Flange, Heat Treatment: 927°C (1700°F) + Age Synonyms -:- For detailed product information, please contact sales. -:

ATI Allvac® VascoMax® C-300 Specialty Steel, Heat Treatment: 927°C (1700°F) + Age Product Information -:- For detailed product information, please contact sales. -: # ATI Allvac® VascoMax® C-300 Specialty Steel ## Premium Ultra-High-Strength Cobalt-Nickel Maraging Steel | Heat Treated to 927°C + Aged --- ### **Product Overview** ATI Allvac® VascoMax® C-300 (commonly designated as **C-300 or C300**) is a **high-cobalt, nickel-maraging steel** representing the **upper echelon of commercially available ultra-high-strength alloy steels**. Engineered to achieve a nominal yield strength of **300 ksi (≈2068 MPa)**, this grade delivers the **highest practical combination of strength and toughness** in the standard maraging steel hierarchy. The specified heat treatment of **austenitizing at 927°C (1700°F) followed by precipitation aging** develops its exceptional properties, making it the material of choice for the most demanding aerospace, defense, and space applications where **absolute maximum strength-to-weight ratio is required alongside critical reliability and damage tolerance**. --- ### **Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Typical (%) | Metallurgical Function | |---------|---------|---------|-------------|------------------------| | **Nickel (Ni)** | 18.0 | 19.0 | 18.5 | Forms the tough, ductile lath martensitic matrix; essential for fracture toughness. | | **Cobalt (Co)** | **11.5** | **12.5** | **12.0** | **Critical Driver.** Reduces solubility of Mo in martensite, dramatically increasing the thermodynamic driving force for precipitation hardening, enabling strength > 300 ksi UTS. | | **Molybdenum (Mo)** | 4.6 | 5.2 | 4.9 | Primary precipitation hardener; forms fine, coherent Ni₃Mo intermetallic particles. | | **Titanium (Ti)** | **1.2** | **1.45** | **1.35** | **Key Strengthener.** Substantially increased vs. C-250 grade. Forms abundant Ni₃Ti precipitates, contributing massively to the target 300 ksi strength. | | **Aluminum (Al)** | 0.05 | 0.15 | 0.10 | Deoxidizer; contributes to grain refinement. | | **Carbon (C)** | — | 0.03 | ≤0.01 | Ultra-low to maximize toughness and weldability. | | **Manganese (Mn)** | — | 0.10 | 0.05 | Residual element. | | **Silicon (Si)** | — | 0.10 | 0.05 | Residual element. | | **Boron (B)** | — | 0.005 | 0.003 | Enhances hardenability and grain boundary strength. | | **Zirconium (Zr)** | — | 0.02 | 0.01 | Grain refiner; improves toughness. | | **Sulfur (S)** | — | 0.010 | ≤0.005 | Impurity control. | | **Phosphorus (P)** | — | 0.010 | ≤0.005 | Impurity control. | | **Iron (Fe)** | Balance | — | — | Base element. | **Core Identity:** This is the direct commercial equivalent to **AISI 18Ni(300) / Maraging 300** (UNS K92890). The "C" prefix denotes ATI's proprietary production and quality control. The chemistry is optimized to achieve the **300 ksi (2068 MPa) Ultimate Tensile Strength** benchmark. --- ### **Recommended Heat Treatment** 1. **Austenitizing (Solution Treatment):** * **Temperature:** **927°C (1700°F)** ± 15°C * **Time:** 1 hour per inch of thickness (minimum 1 hour), then **Air Cool**. * **Purpose:** Produces a uniform, soft, low-carbon lath martensite with all alloying elements in solid solution. Hardness: ~30-34 HRC. 2. **Aging (Precipitation Hardening):** * **Temperature:** **482°C (900°F)** ± 5°C * **Time:** 3-6 hours (typically 3-4 hours for sections < 50mm), then **Air Cool**. * **Phenomenon:** Induces the uniform precipitation of fine, coherent intermetallic compounds (Ni₃Mo, Ni₃Ti) within the martensite matrix, increasing strength by over 100% with minimal dimensional change (~0.05% growth). --- ### **Mechanical Properties (After 927°C Austenitize + Aged)** *Typical minimum guaranteed values in peak-aged condition (Longitudinal direction).* | Property | Minimum Guaranteed | Typical Achieved | Test Standard | |----------|-------------------|------------------|---------------| | **Ultimate Tensile Strength (UTS)** | **2000 MPa (290 ksi)** | 2060 - 2140 MPa (299 - 310 ksi) | ASTM E8 | | **0.2% Yield Strength (YS)** | **1900 MPa (276 ksi)** | 1960 - 2050 MPa (284 - 297 ksi) | ASTM E8 | | **Elongation (in 50 mm)** | 8% | 10 - 12% | ASTM E8 | | **Reduction of Area (RA)** | 45% | 50 - 60% | ASTM E8 | | **Hardness** | 50 HRC | 52 - 54 HRC | ASTM E18 | | **Fracture Toughness (K_IC)** | **70 MPa√m** | 75 - 90 MPa√m | ASTM E399 | | **Modulus of Elasticity** | 180 GPa (26.1 x 10⁶ psi) | 185 - 190 GPa | ASTM E111 | | **Fatigue Strength (10⁷ cycles, R=0.1)** | Report | 600 - 700 MPa | ASTM E466 | **Key Performance Balance:** The **~2000 MPa UTS combined with ~80 MPa√m K_IC** represents the optimal balance for most ultra-high-strength applications, offering a superior **strength-toughness product** that is the hallmark of this grade. --- ### **Physical Properties (Aged Condition, 20°C)** | Property | Value | |----------|-------| | **Density** | 8.01 - 8.03 g/cm³ (0.289 lb/in³) | | **Melting Range** | 1410 - 1440°C (2570 - 2625°F) | | **Thermal Conductivity** | 19 - 20 W/m·K | | **Coefficient of Thermal Expansion** | 10.5 x 10⁻⁶ /°C (20-100°C) | | **Specific Heat** | 460 J/kg·K | | **Electrical Resistivity** | 0.60 - 0.65 μΩ·m | | **Magnetic Properties** | Ferromagnetic (Martensitic) | --- ### **Key Characteristics & Advantages** * **Unmatched Strength-Toughness Synergy:** Provides the best overall balance of ultra-high strength and fracture toughness in its class. * **Excellent Fabricability (Annealed State):** Can be easily machined, formed, and welded in the solution-annealed condition (~30 HRC). * **Simple, Low-Distortion Aging:** The final aging process requires no quenching, minimizes distortion, and allows for precise dimensional control. * **Superior Damage Tolerance:** High fracture toughness enables damage-tolerant design principles, providing a safety margin against unforeseen flaws. * **Good Stress Corrosion Cracking (SCC) Resistance:** Inherently more resistant to SCC than many other ultra-high-strength steels. * **Proven Reliability:** Extensive history in critical aerospace applications with well-documented performance. --- ### **International Standards & Designations** This is one of the most standardized and widely specified ultra-high-strength steels. | Standard/System | Designation | Title / Notes | |----------------|-------------|---------------| | **Aerospace Material Spec (AMS)** | **AMS 6521** | *Steel Bars, Forgings, and Tubing 18.5Ni-9.0Co-4.9Mo-0.65Ti (Maraging 300)*. This is the **primary governing specification**. The "300" denotes 300 ksi UTS. | | **ASTM International** | **ASTM A538 Grade B** | *Precipitation-Hardening Alloy Steel Bar, Forging, and Forging Stock for High-Strength Service.* Commonly references this strength level. | | **Proprietary/Trade Name** | **ATI Allvac VascoMax C-300**, **Marval M18-300** | Leading commercial names. | | **Unified Numbering System (UNS)** | **K92890** | Standard designation for 18Ni maraging steels. | | **Military Standard** | **MIL-S-46850** | Covers maraging steels including this grade. | | **European** | **X2NiCoMo18-9-5** (similar) | Rough equivalent in material designation system. | --- ### **Primary Applications** VascoMax C-300 is the **benchmark material** for critical, weight-sensitive structural components across advanced industries. 1. **Aerospace & Defense (Primary Use):** * **Rocket and Missile Motor Casings:** For space launch vehicles, ICBMs, and tactical missiles. * **Aircraft Landing Gear:** Critical forgings for main struts, trucks, and pistons in fighter jets, commercial aircraft, and UAVs. * **Helicopter Rotor Hubs, Flexbeams, and Drive Shafts.** * **Satellite and Spacecraft Structures:** Booms, fittings, deployment mechanisms, and fuel tanks. 2. **Tooling & High-Pressure Equipment:** * **Extrusion Dies and Mandrels** for titanium and nickel superalloys. * **Die Inserts for High-Pressure Die Casting.** * **Components for Isostatic Pressing (HIP) Tooling.** * **Precision Shafts and Spindles** in high-load machinery. 3. **High-Performance Automotive & Racing:** * **Formula 1 and Top-Fuel Connecting Rods, Gears, and Suspension Components.** * **High-Strength Fasteners** for safety-critical assemblies. --- ### **Fabrication & Processing Guidelines** * **Machining:** Perform all heavy machining in the **solution-annealed** condition. Machining aged material is difficult; use CBN or premium carbide tooling with high-pressure coolant. * **Forming:** All significant forming must be done in the annealed state. * **Welding:** Use GTAW (TIG) with a **matching filler metal** (e.g., ER18Ni). **Post-Weld Heat Treatment (PWHT)** is **mandatory** for critical applications: full re-solution anneal (927°C) followed by aging. * **Heat Treatment:** Precise temperature control (±5°C) during aging is critical for consistent properties. * **Corrosion Protection:** **Not stainless.** Requires protective coatings: **electroless nickel, cadmium-titanium plating, or specialized paint systems.** **Post-plate baking** is essential to prevent hydrogen embrittlement. --- ### **Comparison with Other Grades** | Feature | VascoMax C-300 (300 ksi UTS) | VascoMax C-250 (250 ksi UTS) | 4340M (260-280 ksi UTS) | |---------|-------------------------------|-------------------------------|-------------------------| | **Strengthening** | Precipitation (Intermetallic) | Precipitation (Intermetallic) | Quench & Temper (Carbides) | | **Typical YS** | ~1960-2050 MPa | ~1725-1790 MPa | ~1790-1930 MPa | | **Toughness (KIC)** | **Excellent (75-90 MPa√m)** | **Very Good (55-75 MPa√m)** | Moderate (50-65 MPa√m) | | **Aging Distortion** | Very Low | Very Low | High (Quench Cracks/Distortion) | | **Weldability** | Good (with PWHT) | Good (with PWHT) | Poor | | **Key Advantage** | **Best Overall Balance** | **Higher Toughness at 250 ksi** | **Lower Cost** | --- ### **Summary** **ATI Allvac® VascoMax® C-300**, processed via the industry-standard **927°C (1700°F) austenitize and 482°C (900°F) age** cycle, is the **definitive ultra-high-strength maraging steel**. It delivers an unparalleled and proven combination of **extreme strength, exceptional toughness, and reliable manufacturability**. Its status as the material of record in countless aerospace and defense standards (like AMS 6521) underscores its reliability and performance. For engineers designing structures where failure is not an option and every gram of mass is critical, C-300 remains the **first and most trusted choice**, successfully bridging the gap between theoretical material limits and practical, mission-critical engineering reality. -:- For detailed product information, please contact sales. -: ATI Allvac® VascoMax® C-300 Specialty Steel, Heat Treatment: 927°C (1700°F) + Age Specification Dimensions Size： Diameter 20-1000 mm Length <7362 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. -: ATI Allvac® VascoMax® C-300 Specialty Steel, Heat Treatment: 927°C (1700°F) + Age Properties -:- For detailed product information, please contact sales. -:

Applications of ATI Allvac® VascoMax® C-300 Specialty Steel Flange, Heat Treatment: 927°C (1700°F) + Age -:- For detailed product information, please contact sales. -: Chemical Identifiers ATI Allvac® VascoMax® C-300 Specialty Steel Flange, Heat Treatment: 927°C (1700°F) + Age -:- For detailed product information, please contact sales. -:

Packing of ATI Allvac® VascoMax® C-300 Specialty Steel Flange, Heat Treatment: 927°C (1700°F) + Age -:- 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 Flange 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 3833 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