Aerospace and defense programs can't afford a bar supplier who can't certify to spec or ship on schedule. When a program calls for 15-5 PH and the supplier only carries limited sizes, can't produce full material certs, or takes weeks to quote, the whole production timeline slips. Altemp Alloys solves that problem directly. As a 15-5 PH stainless steel bar supplier since 1979, we stock 15-5 PH bar certified to AMS 5659 and UNS S15500, backed by full material traceability and fast quote turnaround for aerospace, defense, oil & gas, chemical processing, and food processing buyers.
What Is 15-5 PH Stainless Steel Bar?
15-5 PH is a martensitic, precipitation-hardening stainless steel developed as a variant of 17-4 PH, engineered specifically for improved toughness in the through-thickness, or short-transverse, direction. In bar form, 15-5 PH offers high strength, high hardness, and good ductility, with corrosion resistance that outperforms Types 410 and 431 and roughly matches 17-4 PH. It's ferrite-free, resists distortion during heat treatment, and holds up in corrosive, high-pressure service environments where lesser alloys fail.
The chemical composition includes elevated levels of chromium, nickel, and copper, with controlled trace amounts of carbon, manganese, phosphorus, sulfur, silicon, and columbium plus tantalum. That composition is what gives 15-5 PH its combination of strength and toughness without sacrificing corrosion resistance.
Specifications We Certify To
As a 15-5 PH Bar Supplier (AMS 5659), Altemp Alloys stocks and certifies bar to the following specifications:
● AMS 5659
● ASTM A-484
● ASTM A-564
● UNS S15500
Every order ships with full material certifications, so procurement and quality teams have the documentation they need for aerospace and defense traceability requirements without chasing down paperwork after the fact.
15-5 PH SS Bar Shapes and Available Conditions
Altemp Alloys stocks 15-5 PH bar in round, flat, hex, and square profiles to match whatever the drawing calls for. Bar can be supplied in standard mill condition or heat treated to any of the eight recognized 15-5 PH tempers:
● H900
● H925
● H1025
● H1075
● H1100
● H1150
● H1150-M
Heat treating 15-5 PH follows a three-step process: conditioning using austenite, air cooling to convert the austenite to martensite, and precipitation hardening to the specified condition. Bar in the fully hardened condition can be further heat-treated to improve resistance to stress corrosion cracking in high-temperature applications. Fabrication after heat treatment is recommended to minimize distortion and residual stress.
Applications
15-5 PH stainless steel bar is machined into components that demand high transverse strength, fatigue resistance, and corrosion resistance in demanding service conditions, including:
● Shafts
● Valves
● Fittings
● Fasteners
● Gears
● Aerospace structural components
● Nuclear reactor components
Industries We Serve
Buyers turn to 15-5 PH bar stock across a range of industries where spec compliance and material availability aren't optional:
● Defense
● Oil & gas
● Chemical processing
● Petrochemical
● Food processing
Why Source 15-5 PH Bar From Altemp Alloys
Altemp Alloys has supplied high-temperature and exotic alloys to the aerospace, aircraft, and defense industries since 1979. Beyond raw bar stock, our value-added services include cutting to length and custom processing so parts arrive ready for the next step in production. Check our current inventory for in-stock 15-5 PH bar sizes, or browse our full 15-5 PH stainless steel product line, including 15-5 PH plate and 15-5 PH sheet, if your program spans multiple forms.
Our team quotes fast because we know a slow quote costs you a slot in the production schedule. Get a quote on 15-5 PH stainless steel bar today, or call 800-227-8103 to speak with our team directly.