X-Mozilla-Keys:                                                                                 

jelkil@interaccess.com wrote:

RB offers their dual tip catback in both metals, but it costs $200 less in
409.  What's the difference between the 2 stainless steel alloys?

Tom Jelly, HSBC Futures at the CME  312-559-1057 7am-2pm.   773-348-6549
(H)  773-206-6764 (cell)

Price? :-)

Higher corrosion resistance as 304 is 18% chrome and
8% nickel.  409 is only 11% chrome. 409 is widely used in
stock catalytic converters according to Marks ME hand book.

Paul Lamar

Bill Freeman wrote:

The 300 series of stainless steels are non-magnetic and not
hardened by heat treatment, only be work hardened (permanent
deformation, like forging or swaging).  The 400 series are
magnetic and *are* heat treatable, like carbon steels.  Beyond
that, the specific alloys have somewhat different performances,
altho many of the specialized 300 series alloys are made to
deal with the poor welding behaviour of the 'ordinary' 300
alloys like 301 thru 304.  321 has added ingredients to make it
OK to weld.  Most 400 series weld OK.

Bill

 
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