Is this wrought iron?

[Jeremy Blohm 87]

I was in the junk yard the other day and seen a few of these old square headed bolts and they looked like wrought iron. So i brought one home to do the knick & break teast and im not 100% sure. It is different than some known wrought that i have. It didnt break though it did peal back like wrough but doesnt have the full string cheese look. Here is a picture.

This is a picture of some known wrought that i have.

  

 

[Jeremy Blohm 87]

[Jeremy Blohm 87]

Here is a more shallow nick. Could this be shear steel?

Edited June 12 by Jeremy Blohm

[Alan Longmire 869]

Spark it and see, but it looks like really clean wrought to me.

[Jeremy Blohm 87]

It had quite a bit more sparks than the other wrought i have.i will get a picture of the spark

[Jeremy Blohm 87]

Known wrought 

Unknown material at question 

1 hour ago, Alan Longmire said:

Spark it and see

Seems like it has a fair amount of carbon 

[Alan Longmire 869]

It does indeed.  Might be shear steel, might not.  The next step is see if it hardens.  Then etch to see if there's a pattern.

[Jeremy Blohm 87]

I plan on it. I am heading back to the scrap yard tomorrow to get the rest of the bolts. I also started making a vice mount for the receiver hitch for my truck so i can do the nick and break test at the yard.

[Jeremy Blohm 87]

I bet there would be good contrast between it and the other wrought i have.

[Jeremy Blohm 87]

I went back to the junk yard and i only found one more of these bolts. There was 3 more but i couldnt find the others. But on the upside the one bolt that was left is about 3/4x48 inches. Plus i found some other goodies