15-5PH Stainless Steel – Complete Technical Datasheet, Properties, Applications & Comparison with 17-4PH

ZYTC Alloy is proud to announce the successful completion and delivery of a recent export order of 15-5PH stainless steel Plate to Russia. The order consisted of 15-5PH duplex stainless steel plate manufactured to ASTM A693 standards, with specifications of 5*1000*2000mm in solution annealed delivery condition.

As part of our commitment to standardized, process-driven, and specialized production and inspection procedures, our quality control team detected that certain areas at the four corners of the 15-5PH plates did not fully meet the required thickness tolerances. After consultation and confirmation with the customer, the non-conforming sections were precisely removed, resulting in final dimensions of 5*930*1930mm. This ensured that the delivered 15-5PH stainless steel fully complied with all dimensional requirements while maintaining the superior material properties that define 15-5PH alloy.

What is 15-5PH Stainless Steel?

15-5PH (UNS S15500 / XM-12 / 1.4545) is a martensitic precipitation-hardening stainless steel containing approximately 15% Chromium and 5% Nickel. This 15-5PH stainless steel achieves its exceptional strength through a precipitation hardening heat treatment process, combining high strength and hardness with moderate corrosion resistance.

Developed as an improvement over the older 17-4PH, 15-5PH was specifically designed to offer greater toughness, particularly in the through-thickness (short transverse) direction. This makes 15-5PH an ideal choice for applications requiring high transverse strength and toughness.

Chemical Composition of 15-5PH

The carefully balanced chemistry of 15-5PH stainless steel is what gives this precipitation-hardening alloy its unique combination of properties. Below is the chemical composition of 15-5PH per ASTM A693 and AMS 5862/5659 specifications:

Composition per AMS 5862 (Sheet/Plate) and AMS 5659 (Bar/Forgings)

Mechanical Properties of 15-5PH

15-5PH stainless steel offers outstanding mechanical properties that can be tailored through different heat treatment conditions (H900, H925, H1025, H1075, H1100, H1150). The mechanical properties of 15-5PH vary depending on the aging temperature and condition chosen:

Mechanical properties per AMS 5862 (Sheet/Plate) and AMS 5659 (Bar)

The solution annealed (Cond A) condition of 15-5PH provides maximum formability and machinability, with hardness up to 38 HRC. Subsequent precipitation hardening heat treatments dramatically increase the strength of 15-5PH stainless steel while maintaining good ductility.

Applications of 15-5PH

15-5PH stainless steel is widely used across demanding industries due to its exceptional combination of strength, toughness, and corrosion resistance. Key applications of 15-5PH include:

• Aerospace Industry: Aircraft components, helicopter parts, landing gear components, fasteners, engine parts, structural components, and marine gas turbine compressor sections

• Oil & Gas Production: Valves, pumps, couplings, and highly stressed machine parts

• Nuclear Reactor Components: Where high transverse strength and toughness are critical

• Medical and Biomedical Equipment: Surgical instruments, tools, valves, and fittings

• Chemical Processing Equipment: Industrial processing equipment with corrosion resistance requirements

• Military Structural Components: Defense applications requiring reliable performance

• Tooling and Mechanical Systems: Shafts, bolts, precision components, injection molds, and extrusion dies

15-5PH vs. 17-4PH – Key Differences

While 15-5PH and 17-4PH are both precipitation-hardening stainless steels, 15-5PH was developed as an improved variant of the older 17-4PH with several distinct advantages:

The key advantages of 15-5PH over 17-4PH include:

• Higher transverse ductility and toughness

• Superior mechanical properties in larger cross-sections

• Better forgeability and weldability

• Reliable magnetic particle inspection capability

• Ferrite-free microstructure ensuring consistent properties

For critical cryogenic applications, 15-5PH should be given preference over 17-4PH because its impact toughness is generally higher.

Production Standards & Capabilities

ZYTC Alloy strictly adheres to internationally recognized standards in the production of 15-5PH and related products. Our 15-5PH stainless steel is manufactured in compliance with:

• ASTM A693 (Sheet/Plate – Grade XM-12)

• ASTM A564 (Bar – Grade XM-12)

• ASTM A705 (Forgings – Grade XM-12)

• AMS 5659 (Bar & Forgings)

• AMS 5862 (Sheet/Plate)

• ASME SA564 / SA693

• BMS 7-240 (Boeing Specification)

• UNS S15500 / XM-12

• DIN 1.4545 / EN X5CrNiCuNb15-5-4

We can produce 15-5PH in a wide range of forms including:

• 15-5PH Plate & Sheet

• 15-5PH Bar (Round, Flat, Square, Hexagon)

• 15-5PH Strip & Coil

• 15-5PH Wire

• 15-5PH Pipe & Tube

• 15-5PH Forgings

• 15-5PH Custom Components

We welcome drawing-based custom orders and strictly execute production in accordance with ASTM, AISI, ISO, JIS, AMS, and other international standards. Our commitment to quality, fast delivery, and competitive pricing has made ZYTC Alloy a trusted supplier of 15-5PH stainless steel worldwide.

Why Choose ZYTC Alloy for 15-5PH?

• Standardized Production: Every batch of 15-5PH follows rigorous, documented procedures

• Process-Driven Quality Control: Systematic inspection at every stage of 15-5PH manufacturing

• Specialized Expertise: Deep knowledge of 15-5PH precipitation-hardening stainless steel

• Fast Delivery: Quick turnaround on 15-5PH orders

• Competitive Pricing: Value without compromising 15-5PH quality

• Custom Manufacturing: 15-5PH products tailored to your specifications

For all your 15-5PH stainless steel requirements – whether plate, sheet, bar, wire, pipe, forgings, or custom components – contact ZYTC Alloy today.