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!