Stainless Steel Quality

JoeC · Post by **JoeC** » Thu Sep 20, 2007 3:48 pm

I need to replace the exhaust downpipes on a non-BMW bike and am a little confused over the different grades of stainless steel. What does the grading mean and what is a good quality grade for the downpipes.

Cheers

Boxadog 2000 · Post by **Boxadog 2000** » Thu Sep 20, 2007 6:17 pm

A2 is bog standard quality
A4 is marine quality

However just about all downpipes are made of cheapo ductile stainless steel and will be average.

Be prepared to polish on a regular basis.

Bob

JoeC · Post by **JoeC** » Fri Sep 21, 2007 10:03 am

Somebody is selling A2/304 grade. Any ideas on what the 304 is as I have also seen 300, 301 and I think 302.

Blackal · Post by **Blackal** » Fri Sep 21, 2007 11:15 am

304 is good enough for exhausts - there are very few that will be made from 316L (high quality - marine).

304 will be good enough for bolts on a bike, I would have thought

Al

(edited cos I got mixed up with 308 dissimilar rods and 304)

Dog Tyred · Post by **Dog Tyred** » Fri Sep 21, 2007 2:00 pm

Joe

Everything you ever wanted to know about stainless steel is here

http://www.bssa.org.uk/

Greg