• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Flight Mechanic

Aircraft Mechanic School Study Supplement for Future Aviation Maintenance Technicians




  • Home
  • AMT Training
    • Basic Aviation Maintenance
    • Airframes
    • Powerplants
  • AMT Schools
  • AMT Books
  • Tip Jar
You are here: Home / Basic Aviation Maintenance / Aircraft Materials Processes and Hardware / Metal Hardness Identification

Metal Hardness Identification

Filed Under: Aircraft Materials Processes and Hardware

Where used, the temper designation follows the alloy designation and is separated from it by a dash: i.e., 7075-T6, 2024-T4, and so forth. The temper designation consists of a letter indicating the basic temper which may be more specifically defined by the addition of one or more digits. These designations are as follows:

  • F — as fabricated
  • O — annealed, recrystallized (wrought products only)
  • H — strain hardened
  • H1 (plus one or more digits) — strain hardened only
  • H2 (plus one or more digits) — strain hardened and partially annealed
  • H3 (plus one or more digits) — strain hardened and stabilized

The digit following the designations H1, H2, and H3 indicates the degree of strain hardening, number 8 representing the ultimate tensile strength equal to that achieved by a cold reduction of approximately 75 percent following a full anneal, 0 representing the annealed state.

 

Flight Mechanic Recommends

Rod Machado's Private Pilot Handbook -Flight Literacy recommends Rod Machado's products because he takes what is normally dry and tedious and transforms it with his characteristic humor, helping to keep you engaged and to retain the information longer. (see all of Rod Machado's Products).
   
-->

Primary Sidebar

SEARCH FLIGHT MECHANIC

SEARCH FLIGHT MECHANIC

Aircraft Mechanic Training

Basic Aviation Maintenance

Powerplants

Airframes

Popular Posts

Aircraft Mechanic Salary

Aircraft Mechanic Schools

Aircraft Mechanic Requirements

Aircraft Flight Training

Contact Us | Terms of Use | Privacy Policy
Easy Campfire Recipes | Recipe Workbook



Copyright © 2022 Flight-Mechanic.com