Alloy: 15-5 | Material: Stainless Steel | Shape: Bar-Hex | Production Method: Cold Finish | Across Flats: 1.0625 Inches | Item Length: 48 Inches Stainless Hex Bar 15-5 offers high strength than most stainless alloys and good corrosion resistance. At higher temperatures, the corrosion resistance of 15-5 is lower than other stainless alloys. It is widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries. Stainless steel is an iron alloy with resistance to staining and rusting in many environments where steel would typically degrade. The chemical composition of each grade creates a grain structure that falls into one of five classes: austenitic, duplex, ferritic, martensitic, and precipitation hardening. The austenitic class contains the most formable, weldable, and corrosion-resistant stainless-steel grades, but they cannot be heat treated. The duplex class offers high resistance to pitting and chloride stress corrosion cracking. Duplex grades are heat treatable and roughly twice as strong as austenitic grades. The ferritic class contains moderately formable and corrosion-resistant grades compared to other stainless steel classes, but they cannot be heat treated. The martensitic class includes some of the hardest and strongest stainless-steel grades that also offer mild corrosion resistance, high hardness, and good formability. Martensitic grades can be heat treated. The precipitation-hardening (PH) class can be heat treated after fabrication to achieve some of the highest hardness ratings in stainless steel. UNS S15500, 15-5 PH, 15-5PH This product weighs 13.31 pounds and meets the following specs: AMS-2300, AMS-5659, ASTM-A484, ASTM-A564