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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Leave a Reply Cancel reply Your email address will not be published. Any substitution should be run by an engineer. However, I find some contradicting answers when searching around, can it be both depending on the heat treatment and consequent microstructure? Waqas- You are correct, no further processing is permitted after final heat treatment.

It is usually used in higher temperature applications. The corresponding nuts standards are A grade 8M and F group 2. Saddam- Your supplier should have material test reports and documentation to show how the material was manufactured. You will need to consult the project engineer and get their approval for the substitution.

Neil- A B7M does not specifically cover washers, although I guess theoretically you could make them from the same material. What is the difference between B7M and B7M comply to nace mr If washers were to be required what would it be? Cherry — Apologies, but we are not familiar with MS material and a quick Google search does not bring up any results. I see no issues using the same bolting material to make washers for use here.

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. Enviornment is a little bit corrosive. 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.


Sohrabmohammadi — Yes, both of those grades of fastener can be hot dip or mechanically galvanized.

It is not exact, but the closest of the four grades you listed. Hello, Please tell me about use B7 and B7M which one and for what, for instance in a valve.

ASTM A B7 vs. A B7M – Portland Bolt

I am working in petroleum refinery. B7 and B7M are very different. May you help me about material specifications… I have a problem about material MS Ashkiani- The only difference is that the machine bolt has a head, and the stud bolt does not. While as per clause 6. A mild steel washer is not hardened and will likely not esparraogs as well with B7 bolts or studs.

You will need to consult with the project engineer. What is the heat treatment process of astm a grade b7m??? If the purchaser requires indentation testing, he must specify 3.

I understand we could not tighten the internals bolts B7M in our case and it should withstand in extreme process condtion i. Ferry- Apologies, but we do not have any engineers on staff, and do not have the expertise to answer this. What standard is the nut compatability chart listed on your website pulled from?

Even a simple cutting process will require an additional heat treat process. There are no ASTM standards for stainless washers. Dear sir, how I can know dsparragos metal applied heat treatment after hardness testing. Class 1 refers to lower strength materials whereas class 2 refers to higher strength, strain hardened material.


Vizal- I am sorry, but we cannot make any specific grade recommendations. Your advise would be much appreciated. Dear Sir, I have a query.

B7 bolts are stronger, but rated for lower temperatures than B7M. Why is this line not mentioned in numerous doccuments?

Esparragos ASTM-A193 Gr B7, Tuercas 2h Tuercas ASTM-A194 Gr 2h Bolt

Why Grade B7M shall have a line under the grade symbol? We have strength and chemical summaries on the individual ASTM summary pages on our website. Will Grade 8 bolts work as a replacement?

You can find summaries of both standards on our website. Islam — You would need to get approval from the project engineer to change bolts. Mechanically, assuming that they are the same grade, they will be identical.

estormex | Esparragos

If the purchaser does not specify 3. We have B7M thread rod and we cut it to some required short length stud bolts did now it is again required heat treatment. Martin- For all intents and purposes, they are the same. ASTM A is a low carbon steel, low strength, general purpose bolt standard. Hi, I would like to clarify if the commonly referred bolt classes class esparragow 2 is of the same meaning segregating b7 from esparrgos