15-5PH Stainless Steel per BMS 7-240
BMS 7-240 15-5PH is a Boeing Material Specification for precipitation-hardening stainless steel UNS S15500 in sheet, strip, and plate form. BMS 7-240 15-5PH is similar to 17-4PH but offers enhanced through-thickness (short transverse) properties without compromising on strength and corrosion resistance.
Product Forms & Size Range of BMS 7-240
15-5PH per BMS 7-240 Plate Thickness ranges from 0.1875″ to 6.50″ Thick.
15-5PH per BMS 7-240 Sheet Thicknesses range from 0.002″ to .150″ Thick.
15-5PH Technical Information
15-5PH Stainless Steel was designed to have greater toughness than 17-4PH, especially in the through-thickness (short transverse) direction. This improved toughness is achieved by reduced delta ferrite content and control of inclusion size and shape.
The composition and processing of 15-5PH is carefully controlled to minimize its content of delta ferrite, which is present in 17-4PH material. Inclusion control is done by consumable electrode remelting using the electro-slag remelting (ESR) process.
15-5PH is martensitic in structure in the annealed condition and is further strengthened by a relatively low temperature heat treatment, which precipitates a copper containing phase in the alloy. Like 17-4PH, 15-5PH Stainless requires only a simple heat treatment; a one-step process conducted at a temperature in the range 900°F (482°C) to 1150°F (621°C) depending on the combination of strength and toughness desired. A wide range of properties can be produced by this one-step heat treatment.
APPLICATIONS OF 15-5PH STAINLESS STEEL
15-5PH stainless steel is often used for fasteners in the aerospace industry due to its high strength and corrosion resistance.
The high strength and good wear resistance of 15-5PH stainless steel make it a good choice for use in gears in the aerospace industry.
15-5PH stainless steel is also used for structural parts in the aerospace industry, such as fuselage frames and wing components.
15-5PH stainless steel is resistant to high temperatures and has good toughness, making it suitable for use in engine components such as turbine blades and exhaust systems.
These are tools that are used in the drilling and exploration of oil and gas wells. 15-5PH stainless steel is often used to make these tools due to its high strength and corrosion resistance. and corrosive environments.
Certified Material for Critical Service
15-5 PH stainless steel is supplied as certified material for critical applications, ensuring compliance with aerospace and industrial quality standards. Each batch comes with full traceability, mill test reports (MTRs), and certifications that confirm chemical composition, mechanical properties, and heat treatment compliance.
This certification ensures that 15-5 PH stainless steel can be safely used in high-reliability components, including aerospace fasteners, engine shafts, structural parts, and downhole tools. Manufacturers sourcing certified 15-5 PH are guaranteed material from approved sources with documented processes for heat treatment, hardness, and mechanical testing, meeting AMS 5659, AMS 5862, and BMS 7-240 standards.