15-5 stainless steel is a martensitic, precipitation-hardening material with chromium, nickel and copper. It is often a first choice in the aerospace industry for fasteners and structural components. Its unique structure provides increased toughness and better corrosion resistance than its predecessor, 17-4 PH. Both inclusion control and a minimized amount of delta ferrite as compared to 17-4 stainless steel contribute to the greater toughness of 15-5. The alloy is further strengthened by a low temperature heat treatment which precipitates a copper containing phase in the alloy. 15-5 PH is able to meet the stringent mechanical properties required in the aerospace and nuclear industries. It is also widely used in food processing, paper, and general metalworking industries.

Chemical Formula
Carbon 0.070%, Chromium 14.0-15.50%, Columbian + Tantalum 0.15-0.45%
Copper 2.50-4.50%, Manganese 1.00%, Nickel 3.5-5.5%, Phosphorus 0.040%, Silicon 1.00%, Sulfur 0.30%

Inventory
15-5 Stainless Steel Plate, 15-5 Stainless Steel Sheet, 15-5 SS Round Bar

Common Trade names
15-5 Stainless, 15-5 Stainless Steel

Features
Corrosion Resistance: 15-5 stainless stands up excellently in a range of atmospheric environments even when exposed to corrosive elements.
Heat Resistance: 15-5 alloy being a martensitic steel hardening precipitation works well for high temperatures.
Excellent strength and toughness in high temperatures.

Applications
This alloy exhibits excellent corrosion resistance and transverse properties which make it well suited for a wide variety applications including valves, aircraft parts, gears, and pump parts.