Is that flange cast iron? Cast _____? What material do u think the piping is made of?

This is a stock downpipe from an older BMW. I'd like to weld to this flange but I'm not sure if it's that simple. Do I have to go through the "welding cast-iron" process? If it is cast iron, can I just weld to the pipes instead? They are currently stick welded on the inside from the factory.

 

looks a little too smooth for cast. I think you'll be fine just going for it

 

if its cast oh youll know when you try to weld it, if it is put it in oven and heat it up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snoochtodanooch &raquo;</TD></TR><TR><TD CLASS="quote">looks a little too smooth for cast. I think you'll be fine just going for it</TD></TR></TABLE>

it actually feels like cast iron. not smooth at all but i was hoping it might be cast steel or something of the sort

 

duh, i totally forgot about this diagnosis trick for cast iron. If you have grinder. grind on a little piece of it. Steel throws bright sparks that you are used to seeing. If it is cast iron, it will throw duller darker sparks than steel. Almost orangey red in color. You can google search it and find some more explainations i am sure, I found it once from somewhere on the internet.

 

I found some things for you to read, the last one is probably going to be the most helpful, but the others are valuable if you get lost somewhere.

http://www.aws.org/cgi-bin/mwf...28;hl=

http://en.wikipedia.org/wiki/Spark_testing_metals

http://shopswarf.orcon.net.nz/spark.html

I figured i would look it up to relearn it, and help you out in the process. These links should make determining whether it is cast iron or steel very easy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snoochtodanooch &raquo;</TD></TR><TR><TD CLASS="quote">duh, i totally forgot about this diagnosis trick for cast iron. If you have grinder. grind on a little piece of it. Steel throws bright sparks that you are used to seeing. If it is cast iron, it will throw duller darker sparks than steel. Almost orangey red in color. You can google search it and find some more explainations i am sure, I found it once from somewhere on the internet. </TD></TR></TABLE>

That's perfect. Exactly what I was lookin for. I'll give it a try when I get back home later. Thanks!