ASME Case 1056-B FQ Material

[KLee777]

Has anyone ever heard of "ASME Case 1056-B FQ" material? I'm trying to evaluate some old Propane storage bullets and this is the material listed on the U-1 form for the hemispherical heads. (See attached U-1)

Does anyone know where I can find data for this material?

Thanks.

 

[TVP]

Looks like this was Grade 70 according to ASTM A212/ASME SA212, which has been made obsolete and replaced by ASTM A515:

http://www.astm.org/Standards/A212.htm

http://www.astm.org/Standards/A515.htm

 

[KLee777]

Thanks, but I was actually looking for info on the 1056-B material. The shell was constructed of SA212-B, but the heads were made of the 1056-B.

I see the tensile is 73,000 psi. Any clue as to the min yield for this material? Or the allowable stress? Someone has penciled in "18,300 Stress" so I assume that's what was used at some point. I just have no way to back any of this up.

 

[metengr]

Check with ASME.org, there should be a copy of the above code case 1056. You may have to pay for this. By the way, FQ stands for firebox quality steel.

 

[KLee777]

Thanks metengr. I will check with them. I'm used to seeing firebox quality steel written as "FBQ," but I figured this was the same notation. Just need more info on the yield stress.