At Adinox Overseas, we are proud to be a leading manufacturer and supplier of high-performance 15-5 PH Flanges, engineered for superior durability and precision across critical industrial applications. 15-5 PH is a martensitic precipitation-hardening stainless steel known for its outstanding strength, toughness, and corrosion resistance, making it an ideal choice for industries such as aerospace, petrochemical, marine, and nuclear energy. These flanges are manufactured in accordance with the universal specification ASTM A182 Grade 15-5PH, and are designated by the UNS S15500 material number.

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Our 15-5 PH Stainless Steel Flanges are carefully forged and machined to provide exceptional dimensional accuracy and performance under high stress and corrosive environments. These flanges offer superior transverse toughness, excellent resistance to oxidation, and retain their strength at elevated temperatures. The precipitation hardening process allows for a combination of high mechanical strength and moderate corrosion resistance, surpassing that of conventional martensitic stainless steels.

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At Adinox Overseas, we adhere to stringent international standards, ensuring our flanges are in full compliance with ASTM, ASME, ANSI, DIN, and EN norms. The UNS S15500 Flanges are commonly used in critical sectors where performance and reliability are paramount. We provide an extensive range including weld neck flanges, socket weld flanges, blind flanges, slip-on flanges, threaded flanges, lap joint flanges, and custom designs as per client specifications.

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Our ASTM A182 15-5 PH Flanges are well-suited for applications involving high pressure, temperature, and dynamic load conditions. Thanks to their improved transverse properties and weldability compared to 17-4 PH, they have become a preferred material in precision engineering and structural components. The reduced delta ferrite content in 15-5 PH enhances ductility and minimizes cracking risks during fabrication or thermal exposure.

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Specifications Of 15‐5 PH Flanges

Specifications	ASTM A182 / ASME SA 182
Standard	ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Pressure Rating	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Size	1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Flange EN	6Bar 10Bar 16Bar 25Bar 40Bar
Coating	Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
Common Types	Forged / Threaded / Screwed / Plate
Face Type	Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Test Certificates	EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report etc.

Chemical Composition for 15‐5 PH Flanges

Grade	C	Mn	Si	P	S	Cr	Mo
SS 15-5PH	0.07 max	1.0 max	1.0 max	.07 max	.03 max	17.5 - 15.0	.05

Mechanical Properties Of 15‐5 PH Flanges

Ultimate Tensile Strength, psi	Yield Strength, psi	Elongation	Rockwell Hardness
160,000	145,000	5%	C35

Application Of Industries

Power Plants

Aerospace

Refineries

Construction

Oil & Gas

Sugar

Chemical

Petrochemical

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