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]

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However B7 and B7M bolts re not mechanically identical. Thanks for your help. If not which is the suitable bolt material A Gr.

However, I find some contradicting answers when searching around, can it be both depending on the eparragos treatment and consequent microstructure? It will depend on how they are being used and what the engineer designed for.

Esparragos ASTM A193 Gr. B7, ASTM a 193 Grado B7 Esparrago, Stud Bolt

What standard is the nut compatability chart listed on your website pulled from? F is the recommended washer for A B7 bolts, and can a mild steel washer be used for A B7?

Manickam- We manufacture carriage bolts and timber bolts, both which have a round, curved head.

I see no issues using the same bolting material to make washers for use here. I understand we could not tighten the internals bolts B7M in our case and it should withstand in extreme process condtion i. Jugal — I am sorry, but we are unable to answer that question.

You can find summaries of both standards on our website. May you help me about correlation Bolt Tensile Strength vs Pressure? Which is category for Mushroom Head roofing bolt without neck to be manufactured?

Neil- A B7M does not specifically cover washers, although I guess theoretically you could make them from the same material. Sorry we could not help. We have B7M thread rod and we cut it to some required short length stud bolts did now it is again required heat treatment. You will need to consult with the project engineer. As for why the larger bolts are 8tpi, the threads are more shallow than their UNC counterparts, which creates a larger thread root area.


Why is this requirement only appied to an order if the customer specifies Supplimentary requirement S3. I am working in petroleum refinery. Enviornment is a little bit corrosive. B7 and B7M are very different. B7M bolt on an SSL flange. If the purchaser requires indentation testing, he must specify 3. It is up to the designer or engineer if they are required or not.

How can we convert B7 to B7M?

As for the studs, same answer, make sure an engineer is ok with the substitution as there may be pros and cons to making the switch. Why is this line not mentioned in numerous doccuments? Your email address will not be published. B7 and B7M are two separate grades within A that are made from alloy steel. The most notable difference from a manufacturing perspective is that when providing AB7M bolts, every individual bolt or stud in the lot must be hardness tested. Vizal- I am sorry, but we cannot make any specific grade recommendations.

It is usually used in higher temperature applications. Tauseef- We are not familiar with BS washers, so I cannot compare those.

A mild steel washer is not hardened and will likely not perform as well with B7 bolts or studs. I do not know why the documents you reference do not mention the line, perhaps they have not been updated since the change was made.

Hello, Please tell me about use B7 and B7M which one and for what, for instance in a valve. It is made from alloy steel which is a ferritic steel. Saddam- Your supplier should have material test reports and documentation to show how the material was manufactured. That said, ASTM F washers are an off the shelf, very common washer that may provide the same benefit at a much lower cost.


estormex | Esparragos

The differences can come if the item is being used in nuclear or special applications, then there might be some additional requirements, but we are less familiar with those. Osama- We are sorry, but we are not familiar enough with the requirements of sanitary lifting stations to know if B7M bolts are allowed. Espaeragos Of those, A B7 is the closest to grade 8. Regardless, the hardness testing should be completed after the final heat treatment.

This is a different grade of material than A Grade B7. However, we do not have any engineers on staff, so we cannot speak to all the possible risks, but what we can say is that 2HM nuts are quite specialized, and I would assume there is a good reason that they were originally specified. Ferry- Apologies, but we do dsparragos have any engineers on staff, and do not have the expertise to answer this.

John — A section 9. Nitin — There are several differences, too many to list here. The A nut chart we created based on common industry practices. We have esparrragos for both ASTM standards on our website. At wellhead platformB7 esparrago used instead of B7Mis there any big issue. What is the heat treatment process of astm a grade b7m???