A563 to F1554-55

Date 06-25-2008 18:08

Yes - ASTM 1554 - Supplementary requirements S1 lists what the requirements are for welding. You already know your .5 CE is too high, low alloy .45% max CE or carbon steel .40% max CE. That would be the least of the problems the nut is much stronger and a higher CE than the bolt.

I have welded the two only with the knowledge and blessing of the Engineer. He had us preheat to 150 degrees and weld two sides of a 1 inch rod/nut not welding all around with E71T-1. He did not tell me his intent......
I have also used a lower grade nut combination.
What did your engineer have to say about it?

By hogan

Date 06-25-2008 18:37

I have not yet talked to the engineer. I was trying to get some info first, or at least a place to research it. What the dwg calls for is a 2 1/2" bar with the nut a 1/4" fillet three side. Additionally, the 1554 has an A572-50 1/2" plate plate with 3/8" fillets on both sides. This is the first time I've dealt with the welding of 1554 or 563 to D1.1, the pqr should be fun.

By waynekoe (**)

Date 07-22-2008 03:35

Speaking of 1554, I've got a project where the Engineer would like to have some grade 55 welded to some A432 gr60 rebar. My issue is that ASMT withdrew the standard in 1968 and didn't replace it. In stead, they issued what is now A615 with its three grades. If anyone out there has any info on its analysis, I would appreciate the input. Thanks in advance-Wayne

By swnorris (****)

Date 07-22-2008 13:39

Wayne,

As far as the three grades, 60 is the most common, so availibility shouldn't be an issue. The carbon equivalent of 615 is not controlled and must be determined through the chemical analysis shown on the actual MTR. The carbon equivalent usually falls between 0.6 and 0.7, so preheat is almost always required for welding. After calculating the C.E. of the rebar, refer to the Minimum Preheat and Interpass Temperature Table in D1.4 for preheat requirements, which is based on the C.E.and rebar size. The formula used to calculate the C.E. is also shown in D1.4.

By waynekoe (**)

Date 07-22-2008 15:15

Thanks for the reply, Scott. Since this bar has been in the floor since '63/'64, I believe the actual MTR won't be readily available, so, in this case, I think they'll have to go with the high value from note d in the table. Again, Thanks for the input.-Wayne

By swnorris (****)

Date 07-22-2008 15:29

Sorry Wayne. I didn't take a few extra seconds to digest your post.

By waynekoe (**)

Date 07-22-2008 16:15

That quite all right. Just don't ever let it happen again!!!!!!!!!