15 5 PH Stainless 15 5 PH Stainless Steel Supplier 15-5 PH steel is a high-strength, martensitic stainless steel that is free of ferrite. It is ideal for use in aerospace, chemical, petrochemical, food processing, paper, and general metalworking applications. With exceptional mechanical properties and corrosion resistance, it can withstand temperatures up to 600 degrees and has strong toughness in both longitudinal and transverse directions. Features of 15 5 PH Chemical – 15 5 draws its strength from its mostly Iron content. Therefore, with 75% Iron, it withstands a lot of force while also being machineable at high temperatures. The 14.5% Chromium does wonders for corrosion resistance. Machining – This steel is easily machinable. It’s best to form the alloy in overaged conditions before welding it with standard methods. Optimal treatment and annealing occur at 1900 degrees, and cold-working improves strength. Whereas nickel, Copper, Manganese, Silicon, and other metals comprise the majority of the steel’s chemical composition, enhancing chemical resistance and reinforcing the steel. Common Uses and Applications – As stated previously, this material works optimally with the following trades: Aerospace Chemical Petrochemical Food Processing Paper General Metalworking It works well under these conditions primarily due to its high strength and accessibility. While not being a very specialized steel, it does have the versatility of working well with everything except for marine or aquatic work. Not Sure What You’re Looking for? Stainless Shapes is an experienced 15 5 PH Stainless Steel supplier. If you would like to know more about our company, the steel we offer, or would like to speak to a sales representative who can help you find the steel you’re looking for, contact us or give us a call today at (800) 748-9811! Furthermore, for a prompt and accurate quote, call us today. Call - 800-748-9811 Frequently Asked Questions Is 15-5 PH stainless steel better than 304 stainless steel? + 15-5 PH (UNS S15500) is a martensitic precipitation-hardening stainless steel containing 14-15.5% chromium, 3.5-5.5% nickel, and 2.5-4.5% copper, with a niobium addition. It is produced by vacuum arc remelting (VAR) to achieve uniform through-thickness properties, making it the preferred grade over 17-4 PH for thick bar, plate, and forging applications. What is the highest quality grade of stainless steel? + 15-5 PH and 17-4 PH share nearly identical nominal composition and aging treatment systems (H900 through H1150 conditions), but 15-5 PH is produced to tighter control with remelting, resulting in improved transverse and through-thickness toughness. 15-5 PH is favored in aerospace for thick sections where 17-4 PH can have directional properties. What material is equivalent to 15-5 PH? + 15-5 PH offers very high strength (H900: 190 ksi tensile, 170 ksi yield), improved through-thickness toughness versus 17-4 PH, good corrosion resistance in mild environments, excellent machinability in Condition A, and ability to be heat-treated to a range of strength levels. It meets AMS 5659 and related aerospace specifications. What is the best stainless steel to avoid rust? + 15-5 PH is used in aerospace structural components (bulkheads, fittings, brackets), oil and gas valve and pump bodies, nuclear reactor internals, food processing equipment requiring high strength, and precision mechanical parts in defense and industrial applications. Is there a better stainless steel than 304? + H900 condition: approximately 190 ksi tensile, 170 ksi yield, 35-45 HRC. H1025: approximately 155 ksi tensile, 145 ksi yield. H1075: approximately 145 ksi, 125 ksi yield. H1150: approximately 125 ksi, 115 ksi yield. Each step-up in aging temperature reduces strength and hardness while improving ductility and toughness. Which type of stainless steel is the strongest? + Yes, 15-5 PH is readily machinable, especially in Condition A (solution-annealed, softest state). After aging to H900-H1025, carbide tooling handles it well. Parts are typically rough-machined in Condition A, then finish-machined and inspected after aging to final condition. What are the disadvantages of 304 stainless steel? + Yes, 15-5 PH can be welded using TIG with ERNi-1 or AWS ER630 filler. Post-weld solution anneal and re-aging is recommended to restore full mechanical properties across the weld and HAZ. Is 409 or 304 stainless better? + Standard aging conditions are H900 (900 F/482 C for 1 hr), H1025 (1025 F/552 C for 4 hrs), H1075 (1075 F/579 C for 4 hrs), H1100 (1100 F/593 C for 4 hrs), and H1150 (1150 F/621 C for 4 hrs). H900 gives maximum hardness; H1150 gives best toughness. Which grade is better for stainless steel? + Stainless Shapes distributes 15-5 PH bar and plate per AMS 5659. Full material certifications (CMTRs) confirm chemistry, mechanical properties, and heat number traceability. Contact Stainless Shapes at 800-748-9811 for current inventory and quoting. How can I tell if my stainless steel is 304 or 316? + 15-5 PH has moderate corrosion resistance -- generally similar to 304 stainless in mild and moderate environments. It is not recommended for sustained exposure to seawater or high-chloride environments. For applications combining high strength and aggressive corrosion resistance, duplex or higher nickel alloys should be evaluated.
