17-7 PH® is a precipitation hardened (PH) stainless steel. It has the same easy-to-work characteristics of the 300 series alloys, yet it is capable of being hardened by a simple heat treatment. It has higher tensile strength/hardness compared to the 300 series when cold worked, and much higher tensile strength/hardness when heat treated. For miniature tubing, it’s typically sold in Condition “C” (cold worked) or “CH900”, (cold worked and then heat treated to 900F). Other conditions and heat treatments are available based on the desired properties.
*17-7 PH® is a registered trademark of AK Steel Corporation.
Possible Mechanical Properties
|Hardness||25 HRC||44 HRC||50 HRC|
|Tensile Strength||140 ksi||200 ksi||260 ksi|
|Density (annealed)||0.289 lb/in3|
|Elastic modulus||29,000 ksi|
|Shear modulus||11,200 ksi|
|Mean specific heat (0-100C)||0.120 Btu/lb/F|
|Mean CTE (70-200F)||8.5 x10-6 in/in/F|
|Electrical resistivity||80 micorohm-cm|
|Magnetic Permeability (Annealed)||1.4 – 3.6|
Additional tubing specification information can be found in K001-15a Standard Specification for Miniature Laser Welded and Drawn Stainless Steel and Nickel-Chromium Alloy Tubing for General Use.
K-Tube has the capability to make tubing with the wall thickness and outside diameter combinations in the table below. Tubing with an OD/Wall ratio lower than 20:1 can be drawn to the final dimensions. Tubing with an OD/Wall ratio between 20:1 and 40:1 must be centerless ground to the final dimensions. K-Tube's capabilities are constantly improving, please inquire if your dimensions are outside of the listed dimensions.
Download The 17-7PH K-Tube Technical Data Sheet
Download the 304-304L K-Tube Technical Data Sheet (PDF) to easily share all the details on this page with your team.