Vulcan entered the long bar quench and temper market and now the Heat Treating division is the largest long bar, induction heat treater in the world with annual. Caution: All material included in this chart is advisory only, and its use by anyone is voluntary. In developing this information, Fastenal has. Esparragos #B7 #Cadmiados #Fluorocarbonados #Galvanizados #Quito # Ecuador [email protected]

Author: Tojazilkree JoJolkree
Country: Italy
Language: English (Spanish)
Genre: Education
Published (Last): 24 May 2016
Pages: 26
PDF File Size: 8.6 Mb
ePub File Size: 12.69 Mb
ISBN: 135-8-72136-955-4
Downloads: 68657
Price: Free* [*Free Regsitration Required]
Uploader: Fegrel

Richard — 2H and 2HM nuts are not the same strength 2HM are lower strength, but rated for higher temperatureso I would recommend against substituting one for the other.

Vijay- Of those, A B7 is the closest to grade 8.

What can be the risks if we accept it as is? It is usually used in higher temperature applications. Mehul — We do not heat treat in house, so you will need to contact a heat treat facility to get specifics about their process. Osama- We are sorry, but we are esparragps familiar enough with the requirements of sanitary lifting stations to know if B7M bolts are allowed.

ASTM A B7 vs. A B7M – Portland Bolt

It will depend on how they are being used and what the engineer designed for. As for why the larger bolts are 8tpi, the threads are more shallow than their UNC espparragos, which creates a larger thread root area.

Cherry — Apologies, but we are not familiar with MS material and a quick Google search does not bring up any results. Hello, Please tell me about use B7 and B7M which one and for what, for instance in a valve. B7 and B7M Bolts have their own equivalent nuts which is 2H and 2HM respectively, is it allowoed to interchange these nuts?


Thanks for esparrafos help. As we know B7M is having less strength but low hardness than B7, how it is helping us. B7 bolts are stronger, but rated for lower temperatures than B7M. Why Grade B7M shall have a line under the grade symbol?

Any substitution should be run by an engineer. It is made from alloy steel which is a ferritic steel.

A193 Esparragos B7 A194 Tuercas 2h Stud Bolt

B7 and B7M are very different. Tauseef- F washers are the recommended washer for A grades B7 and B7M, if washers are needed. The corresponding nuts standards are A grade 8M and F group 2. Your advise would be much appreciated. I am working in petroleum refinery.

Noble — I am sorry, but we cannot make any specific recommendations regarding whether or not you would need a coating. B7 2-can galvanize hex nut A GR.

John — A section 9. Is it just the hardness we are talking abt?

ASTM A193 B7 vs. A193 B7M

Sorry we could not help. Will Grade 8 bolts work as a replacement?

Ashkiani- A stud bolt is a threaded stud with no head, whereas a machine espaarragos has a forged head on one end. Why is this line not mentioned in numerous doccuments? You will need to consult with the project engineer. If washers were to be required what would it be? Neil- A B7M does not specifically cover washers, although I guess theoretically you could make them from the same material. It is up to the designer or engineer if they are required or not.

Washers can, and are sometimes used with both stud bolts and esparragos bolts. There are some significant differences in both the mechanical properties esaprragos the testing requirements of AB7M and AB7.

Nitin — There are several differences, too many to list here. Dear Sir, in term of size and dimension do they have any different? However B7 and B7M bolts re not mechanically identical.


Thanks a lot, Ashkiani. At least Can We say the stud bolts are stronger than machine bolts? There are demagnetization techniques, but normal, off the shelf Ssparragos and B7M bolts will be magnetic.

Even a simple cutting process will require an additional heat treat process. A mild steel washer is not hardened and will likely not perform as well with B7 bolts or studs. I understand we could esparragps tighten the internals bolts B7M in our case and it should withstand in extreme process condtion i. Tauseef- We are not familiar with BS washers, so Esparragoe cannot compare those. How can we convert B7 to B7M? Vizal- I am sorry, but we cannot make any specific grade recommendations.

The design temperature of the tank is 85 deg C only.

We have B7M thread rod and we cut it to some required short esparragoos stud bolts did now it is again required heat treatment.

Mechanically, assuming that they are the same grade, they will be identical.

You may need to contact an engineer or metallurgist. Ashkiani- The only difference is that the machine bolt has a head, and the stud bolt does not. Dear Sir, I have a query. Hi, please let us know what is the difference between A and A I have a query.

F is the recommended washer for A B7 bolts, and can a mild steel washer rsparragos used for A B7?