Full Transcript:

What’s up guys?!?!? Michael back and guess what? I’m talkin Metal. Today, our video is another alloy of the 300 series of stainless steels found in  aerospace applications 310 and 310S.  These alloys differ only in the maximum carbon content permitted. 310 is  point 25% max C and 310S is restricted to point 08% max.

Both 310 and 310S are austenitic stainless steels that have excellent oxidation resistance at higher temperatures. 310S is the more commonly produced version of the basic alloy and it also exhibits improved corrosion resistance as compared to 304 due to its higher Chromium and Nickel content. Typically used in the annealed  condition  aka Cond A. Annealing temperature is from 1900 to 2100 deg F. followed  by rapid cooling for maximum corrosion resistance.

Either version is used for the high temperature oxidation resistance. The lower carbon 310S is preferred where the enhanced corrosion resistance of the alloy is required.

310 and 310S are considered non – magnetic in the annealed condition.

310           SAE 30310        UNS S31000

310S         SAE 30310S     UNS S31008

Density:      point 29 lbs per cubic inch

Mean Coefficient of Thermal Expansion from 32 -212 deg F:

8.8 microinch per inch per deg F

Machinability rating: 36 %   (of 1212)

Chemical Composition   310S      UNS S31008

Carbon            0.08 % Max *

Manganese      2.00 % Max

Silicon              1.00 % Max

Phosphorus      0.04 % Max

Sulfur                0.03 % Max

Chromium        24.00 – 26.00 %

Nickel               19.00 – 22.00 %

Molybdenum     0.75 % Max

Copper              0.75 % Max

* 310    UNS 31000   .25% max C

Typical  minimum mechanical properties for 310 in the solution annealed condition:

Yield Strength                30,000 psi

Tensile Strength             75,000 psi

Elongation                       35 %

Reduction of Area            50 %

Aerospace specifications for solution annealed condition:

AMS 5572 Seamless Tubing

AMS 5577  Welded Tubing

AMS 5651: Bars, Forgings, Mechanical Tubing and Rings

AMS 5521: Sheet, Strip, and Plate

AMS-QQ-S-763  Bars, Shapes, and Forgings

The ASTM and ASME standards for commercial applications are too numerous to detail here.

Refer to our website for more information and videos on stainless steels. Additional specifications and part requirements can alter what we have shown you here today. SO CHECK THE SPECS !!!!!!!!!!!

Check out the earlier videos on stainless steels, and Michlin Metals is a distributor and supplier of 310 and 310S. visit us at our website www.michlinmetals.com. If you missed the previous week’s video click here, haven’t subscribed but you are still here? You should….Click here. This is Michael with Michael Talks Metal, see you next Thursday 10am. I’m out!