huangyhg

astm a514 gr. b steel need specs of this grade
i've got a customer who specifies astm 514 gr. b steel for the manufacture of a centrifugal fan rotor (8' diam) with thicknesses of 3/4" to 1/4" for a cement plant, welding should be by aws 11018 rods and some parts requiere a complicated doble bend that will have to be done by spinning the material in a lathe (compound curve lips).
question: what is the alloy specs for this steel y can only get it for the astm 517 with no grade specification from a local supplier (bohler-austria chronit t-1 in grades 400 and 500 they can't specify the denominational diference between both types, they are 400bhn and 500 bhn)
has any one any experience spinning this material (1/4" thickness and 5' diam for the inlet mouth)
any suggestions will be welcomed
thanks
sacem1
i have seen it formed on ball rolls or the shroud inlet machined from flat bar after its welded to the shroud.
the basic differences can be viewedby looking up the spec here
you can download specifictions directly from astm for a fee.
also check:
pipewelder1999 has excellent input and link.
i have used astm 514 in the past. it is excellent material. be careful if you are welding. not all welders and welding process are appropriate for a514. i love to make high strength mechanical part of it (a hinge for example) and i do that by machining. it machines real well.
astm a 514 and a 517 are specifications for high-strength quenched and tempered plate for structural and pressure vessel applications; a 514 type a has the identical composition limits as a 517 grade.
united states steel was first to introduce this fine material under their proprietary name t-1 steel. due to the proprietary nature, the alloy composition of the material could not be divulged. therefore, the industry introduced the astm a 514 as equivalent to t-1 steel.
there are several grades for a514. each grade has separate mechanical properties. i can fax you some properties for the various grades of a 514 from my machine handbook.
the following link is for a pdf that contains lots of information that may be helpful to you:
thanks to all of you, the information has been exact and very helpful.
when support like this comes back i feel like we all have a big brotherhood of engineers that can and will help if need arises. it really feels well.
thanks
sacem1

__________________
借用达朗贝尔的名言：前进吧，你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]