17-4PH Stainless Steel: Aging Condition and Precision Fits

17-4 PH is a precipitation-hardening stainless steel. Material reference.

Aging Condition and Precision Fits

Specify the aging condition rather than ordering a part to a strength number copied from an unspecified datasheet. A precision shaft may be machined before or after aging; agree the sequence around the fit, distortion allowance and machining cost. Do not treat all aging conditions as interchangeable.

Manufacturing and acceptance checks

Request the full product specification, starting condition and final heat-treatment record. Place hardness and dimensional checks after the last relevant treatment. If toughness or corrosion performance is critical, specify the applicable acceptance tests and environment instead of accepting a generic stainless-steel description.

Compare related options

• SUS410
• SUS316

Reference and scope

ATI: 17-4 precipitation-hardening stainless steel provides material or specification background. The checks above are purchasing guidance; final acceptance values must come from the agreed grade, product specification and condition.

Send a drawing and material requirements for review. Include quantity, critical dimensions and the inspection evidence required with delivery.