SA285-C vs SA516-70
SA285-C vs SA516-70
(OP)
Have previously used SA285 Grade C plate for the construction of miniature boilers. A quantity of SA516 Grade 70 plate has been made available to me for the construction of another miniature boiler. Would a list member please advise if there are any welding considerations to be taken into account when using SA516-70 vs. SA285-C?





RE: SA285-C vs SA516-70
RE: SA285-C vs SA516-70
Or at least that's what I believe to be true.
RE: SA285-C vs SA516-70
Yes, you are correct. The ultimate tensile strength for the SA 285 Grade C plate material varies from 55Ksi up to 75 Ksi. However, Section II will only credit the 55ksi for design purposes. I doubt that one would use an AWS 5.1 E6010 weld rod to qualify for a full penetration groove weld, but you never know. I would expect that the OP's WPS would have been qualified using E7018 for the SA 285 Grade C plate.
RE: SA285-C vs SA516-70
Lots of times E6010 is used for tacks and roots,fill and cap with E7018.
If you are joining a replacement part on to something that is old or has been in service E6010 works much better for your first layer.
RE: SA285-C vs SA516-70
Joe Tank
RE: SA285-C vs SA516-70
RE: SA285-C vs SA516-70
Nice thought....but I would want to see calcs. for what is used. There are other considerations.