Full Transcript:

What’s up guys? This is Michael with Michael Talks Metal back for our 51st video in our 52nd week! Only 1 week off, Not bad for our first year out. I’ve never really mentioned my actual company or the location where much of my metal content resides and that’s michlinmetals.com. Take a peek over there for all kinds of info on metals. So 1 plug in 1 year. That’s an acceptable ratio for our first year. Now, those of you who haven’t subscribed. Please do so now, or if you like the video, how about clicking on the button that looks like this? Enough of this banter, let’s do this!

Our topic for today is another precipitation hardening type of stainless steel 15-5. The UNS designation for the chemical composition is UNS S15500.

Capable of high strength and toughness after heat treatment and with the corrosion and oxidation resistance typical of stainless steels, 15-5 finds applications in aircraft structural components as well as in chemical  processing equipment  or other corrosive environments.

For aerospace applications, the alloy is premium quality Consumable Electrode Melted  ( CEM ) or Consumable Electrode Vacuum Melted ( CEVM ).  Cleanliness requirements of AMS 2300 are applicable.

As in all of the precipitation hardening stainless grades, it receives a solution anneal that is followed by an aging treatment to develop final properties.

Typical solution anneal is at 1900 deg F and then rapidly cooled to room temperature.

Aging temperatures are specified by the condition description:

The H900 condition  is aged at 900  deg F,  H1100 is aged at  1100 deg F, etc.

Aging  requires one hour at temperature for H900 and 4 hours when aged to other conditions..  Cooling rate after aging is an air cool.


15-5 UNS S15500 Chemical Composition:
Carbon0.07 % Max
Manganese1.00 % Max
Silicon1.00 % Max
Phosphorus0.03 % Max
Sulfur0.015 % Max
Chromium14.00 – 15.50 %
Nickel3.50 – 5.50 %
Copper2.50 – 4.50 %
Columbium plus Tantalum0.15 – 0.45 %

Density  .280 lbs per cubic inch in the solution annealed condition

Minimum  Mechanical Properties:   H 900  condition –  Longitudinal

190,000 psi Tensile Strength

170,000 psi  Yield  Strength

10 % Elongation

35 % Reduction of Area

15-5 Specifications:
AMS 5659Bar and Forgings
ASTM A 564Bar and Forgings
ASME SA 564Bar and Forgings
AMS 5862Plate
ASTM A 693Plate
ASME SA 693Plate

But as we have told our viewers many times before, specifications and part requirements can add to or alter the information we have presented to you today. For the 51st time, I will remind you to CHECK THE SPECS. Oh and if you made it this far, please consider subscribing. If you have missed any of the previous videos, click here. Thanks for watching, this is Michael, with Michael Talks Metal, see you next Thursday, 10am. I’m OUT!