Alloy 25 (L605) is a solid-solution-strengthened cobalt-chromium-tungsten-nickel alloy engineered for exceptional high-temperature strength and oxidation resistance up to 1093°C (2000°F). With a nominal composition of 20% chromium, 15% tungsten, and 10% nickel in a cobalt base, it combines outstanding elevated-temperature mechanical properties with excellent fabricability. This alloy is extensively used in gas turbine combustion chambers, afterburner components, and industrial furnace hardware .

1. Product Specifications & Physical Data

ZYTC Alloy supplies UNS R30605 in comprehensive mill forms for aerospace, power generation, and industrial applications requiring verified high-temperature properties and complete material traceability.

• Available Forms: Bar (rounds), rod, wire, welding wire, sheet, strip, foil, billet, and forging stock .

• Specifications: AMS 5537 (sheet/strip), AMS 5759 (bar/forgings), AMS 5796 (welding wire), ASTM F90, UNS R30605 .

2. Fabrication & Material Comparison

Alloy 25 offers good fabricability with proper techniques, though its cobalt base requires specific processing parameters.

• Annealing: 1177-1232°C (2150-2250°F) × rapid cool; 1204°C (2200°F) typical .

• Stress Relieving: 482°C (900°F) × 4 hours, air cool; provides slight additional hardening .

• Hot Working: 1177-1232°C (2150-2250°F); reheat as necessary .

• Cold Working: Rapid work-hardening rate; intermediate anneals required for severe deformation .

• Machining: Carbide tools suitable; high-speed steel tools recommended for milling, drilling, and tapping. Requires rigid setups and adequate coolant .

• Welding: Readily welded using GTAW (TIG), GMAW, and shielded metal-arc processes. Surface must be clean and free of contaminants .

• Material Comparison:

  • vs. Haynes 188: Similar cobalt base; L605 higher tungsten, lower lanthanum; both excellent for high-temperature service .

  • vs. Inconel 625: Higher temperature capability; higher density; different strengthening mechanism .

  • vs. Stellite 6B: Wrought vs. cast form; L605 offers better fabricability for sheet metal components .

  • vs. MP35N: L605 optimized for high-temperature service; MP35N for ultra-high-strength at lower temperatures .

3. Applications

• Aerospace & Gas Turbines: Combustion chambers, flame holders, afterburner components, turbine seals, transition ducts, exhaust nozzles

• Industrial Furnaces: Furnace liners, muffles, radiant tubes, heat treatment fixtures, baskets

• Medical: Prosthetic devices, surgical instruments, orthopedic implants

• Power Generation: Land-based gas turbine components, high-temperature hardware

• Electronics: High-temperature electronic components, vacuum tube parts

Contact ZYTC Alloy for certified Alloy 25 / L605 materials with complete traceability, AMS/ASTM specifications, technical datasheets, and competitive pricing on standard sizes or custom-fabricated components.

Email: daisy@zytcsteel.com

WhatsApp/WeChat: +86 17335753350