15-5PH Stainless Steel Bar (AMS 5659)
Arch Metals supplies 15-5PH stainless steel bar from Dallas, Texas, for aerospace, defense and industrial customers across Texas and the surrounding states. 15-5PH is a martensitic precipitation-hardening stainless steel that combines high strength with good corrosion resistance and better transverse toughness than 17-4PH. We supply 15-5PH bar to AMS 5659 and ASTM A564 Type XM-12 with certified material and saw cutting to length. Request a quote and we’ll confirm sizes and availability.
15-5PH Stainless Steel Forms
- Round bar, Condition A (solution treated)
- Bar aged to H900 through H1150 on request
- Flat and hex bar on request
Size availability changes with mill supply. Send us your sizes through our quote request form and we’ll confirm stock, lead time and pricing.
15-5PH Stainless Steel Conditions and Specifications
- Condition A bar (AMS 5659, ASTM A564 XM-12): solution treated and ready to machine. Parts are aged after machining with a simple low-temperature treatment.
- Aged conditions H900 to H1150 (AMS 5659): aging temperature sets the balance of strength and toughness. H900 gives the highest strength, while H1025 and H1150 trade strength for toughness and stress-corrosion resistance.
- Melting practice (CEVM): 15-5PH is usually consumable-electrode vacuum melted for cleanliness and uniform properties in aerospace parts.
Not sure which condition or specification your drawing calls for? Send us the print requirements and we’ll match the material.
Typical Properties of 15-5PH Stainless Steel (H1025)
- Ultimate tensile strength: about 155 ksi (1069 MPa)
- Yield strength: about 145 ksi (1000 MPa)
- Elongation: about 12%
- Hardness: about 35 HRC
- Density: 0.282 lb/in³ (7.80 g/cm³)
- Chemistry: about 15% chromium, 4.5% nickel and 3.5% copper, with niobium
These are typical values for 15-5PH in the H1025 condition. Guaranteed minimums vary by specification, condition and size, so check the governing spec or your mill cert for design values.
Why Engineers Choose 15-5PH Stainless Steel
15-5PH is a refined version of 17-4PH stainless steel with less delta ferrite, which gives it better toughness in the transverse direction and in large sections. It machines in Condition A and hardens with a single low-temperature aging step, so distortion is minimal. For even higher strength, see 13-8Mo stainless bar. Common uses for 15-5PH include:
- Aircraft structural fittings and actuator parts
- Valve, pump and gear components
- Fasteners and shafts
- Nuclear and chemical processing parts
15-5PH Stainless Steel FAQs
What is the difference between 15-5PH and 17-4PH?
Both are precipitation-hardening stainless steels with similar strength. 15-5PH has less delta ferrite, so it has better transverse toughness and ductility, especially in larger sections. 17-4PH is more widely used and usually costs less.
What does H1025 mean?
It means the material was aged at 1025°F after solution treatment. Lower aging temperatures such as H900 give higher strength; higher ones such as H1150 give more toughness.
Can 15-5PH be machined?
Yes. It is usually machined in Condition A and then aged, because aging causes only a small, predictable dimensional change.
Cut-to-Size 15-5PH Stainless Steel With Delivery Across Texas
We ship 15-5PH stainless steel throughout Texas, Oklahoma, Louisiana, New Mexico and Arizona, and we saw bar and plate to the size you need. See our processing services for cutting options, or browse all the metals we supply. We also supply 17-4PH and 13-8Mo stainless bar.
To get pricing, send us the grade, condition, form, size, length and quantity through our quote request form, or call (888) 444-6061.