Stellite 25 L605 Sheet Plate | AMS 5537 | UNS R30605

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PM Industries manufactures, supplies, and stocks AMS 5537 Stellite 25 L605 Sheet Plate (UNS R30605). AMS 5537 is the aerospace material specification covering L-605 in sheet and strip form, establishing chemistry, mechanical property requirements, heat treatment condition, and surface quality standards for aerospace production. Stellite 25, Haynes 25, and L-605 are trade names for the same cobalt-chromium-nickel-tungsten alloy composition. Material certified to AMS 5537 satisfies procurement requirements under any of those designations.

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L-605 is a solid-solution strengthened cobalt superalloy. Tungsten and chromium are the primary strengthening and stability contributors. The high chromium content, approximately 20%, provides oxidation resistance and a stable protective oxide in combustion gas environments. Tungsten solid-solution strengthening gives the alloy its elevated temperature strength. Carbon contributes to strength through carbide formation. Together those elements produce a cobalt superalloy with good high-temperature strength, reliable oxidation resistance, and better fabricability than many nickel superalloys of comparable temperature capability.

High-temperature strength to approximately 980°C covers the operating range of combustor and hot-section structural sheet metal in aerospace gas turbines. At those temperatures, standard nickel alloys and austenitic stainless grades are well below their practical strength limits for structural use. L-605's cobalt base and tungsten solid-solution strengthening maintain adequate yield strength and creep resistance in that range, which is why it has been a standard sheet material in gas turbine combustors for decades.

Wear resistance at temperature is a practical advantage in components where surface contact or mechanical abrasion occurs alongside high heat. Cobalt-base alloys generally have better wear resistance than nickel-base alloys of comparable hardness, which is a relevant property for combustor hardware where metal-to-metal contact can occur at hot-section sliding joints, seals, and liner attachment features.

Fabricability in sheet form is better than most comparable-strength nickel superalloys in the same temperature capability class. L-605 in the solution-annealed condition can be formed, cut, and welded using standard shop practices with procedures appropriate for cobalt superalloys. That practical fabricability is part of why L-605 has remained in continuous production for aerospace combustor and hot-section sheet metal applications through multiple generations of engine programs.

The comparison to Haynes 188 is relevant for application engineers choosing between cobalt superalloy sheet options. Haynes 188 has better oxidation resistance at the highest temperatures due to its lanthanum addition, while L-605 generally has higher room-temperature and intermediate-temperature tensile strength. For combustor applications dominated by oxidation exposure, 188 is often preferred. For applications where higher structural strength is the priority, L-605 is the stronger specification.

Industries and typical applications:

• Aerospace gas turbines: combustor liners, transition ducts, flame holders, hot-section structural sheet metal, and afterburner components in certified aerospace engine programs
• Military aerospace: military gas turbine combustion hardware and hot-section sheet metal in high-performance aircraft engines
• Industrial gas turbines: combustion hardware and hot-section sheet metal in power generation turbines
• Orthopedic and medical: L-605 in sheet form is also used for certain surgical implant and medical device applications where its wear resistance, biocompatibility, and strength are all required
• Space propulsion: high-temperature structural sheet metal in launch vehicle propulsion hardware

Sheet and plate are available in the solution-annealed condition with full material certification to AMS 5537 and applicable specifications. Contact PM Industries for thickness, width, length, quantity, and pricing.

SpecificationStellite 25 L605 Sheet Plate | AMS 5537 | UNS R30605

Specifications	ASME SA 240/ASTM A 240
Standard Sizes	1000 x 2000 mm, 1220 x 2440 mm, 1500 x 3000 mm, 2000 x 2000 mm, 2000 x 4000 mm
Width	10-2500mm
Length	2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hairline, sand, blast, Brush, etching, etc
Thickness	0.1mm to 100 mm Thk
Hardness	Quarter Hard, Half Hard,Spring Hard, Soft, Hard
Stock available in form of	Shim Sheet, Rolls, Strip, Flats, Clad Plate, Plain Sheet, Plate, Sheet, Coils, Foils, Rolling Sheet, Rolling Plate, Flat Shim, Flat Sheet, Blank (Circle), soft annealed, sheared, annealed, tread plate,descaled, Checker Plate
Profiling	Plasma Plate Cutting
Value added services	Plasma cutting, Waterjet cutting, Laser cutting, welding, edge preparation, etc.
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

Available Types of Aluminium 1100 Sheet & Plate

Aluminum 1050 Sheets & Plates – Equivalent Grades

European Standard	BS (OLD)	USA (AA)	GERMANY (DIN)	ISO	IS	Canadian
EN AW-1050 A	1E	1050	Al99.5	Al99.5	19500, 19501	1 S

Aluminum 1050 Sheet & Plate – Chemical Composition

Alloy (ISS)		Equivalent alloy (A.A)	Copper		Magnesium		Silicon		Iron		Managanese Others* (Total)		Remarks
Old	New	U.S.A	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Max	Max.		Aluminum 99.0% Min.
1 B	19500	1050	—	0.05	—	—	—	0.30	0.4	—	0.05	0.1		Aluminum 99.5% Min.

Aluminum 1050 Sheets & Plates – Mechanical Properties

Alloy	Temper	UTS (Mpa)		Yield Strength (Mpa)		Elongation (%)
		Minimum	Maximum	Minimum	Maximum	A 50mm (Minimum)
EN AW-1050 A	F	60	–	20	–	23
	O	60	95	20	–	23