- For A325 is attached link,
- For A307 a good rule is the take your grip length (link to grip length page) add one bar diameter (for nut) add 1/8” for each washer and add ¼” to ½” thread length past nut
- Yes, material with Tensile strength of 130ksi and under should galvanize but we strongly recommend the following
- Use a fastener manufacturer or supplier that is familiar with the process involved in doing this.
- Confirm that the Galvanizer performing this work is aware of how to avoid hydrogen embrittlement, the specification that they are galvanizing to.
A307 Grades A and B
A449 Type 1
A325 Type 1
A354 Grades BC and BD
A490 Type 1
F1554 Grade 36, 55, and 105
Due to A563-DH’s lack of Availability, A194-2H is commonly substituted when A563-DH is unavailable, but both can be substituted for each other.
There is only one instance where they cannot replace one another and is when using A193-B7 Bolts, you MUST use A194-2H Nuts, A563-DH Nuts cannot be used with A193-B7 Bolts.
- 1 week for bare metal products –
- 1 week for heat treat – anything forged that Gr5,A325, A193 B7
- 1 week for galvanizing
In emergency cases we have been able to manufacture, heat treat and galvanize product in 2 to 3 days but this can add significant cost to your project and, with a little planning, can usually be avoided.
Steels susceptibility to hydrogen embrittlement is influenced by many factors: steel grade, heat treating, cold working, size, design, etc. During the acid pickling reaction of the galvanizing process there is the potential to introduce hydrogen atomic which may result in embrittlement happening. Hydrogen Embrittlement generally is only a factor in steel with a 150KSI yield or greater or material that has been serveley bent or formed. Pacific Bolt will not galvanize material with tensile greater than 145 KSI Tensile and takes extra steps in preparing steel with 105 KSI or greater Tensile to limit any chance of embrittlement on these items.
Recommend Reading ASTM A 143 – Standard Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanizing
Yes, Pacific Bolt does this testing using a third party accredited testing facility. With our years of experience we can generally advise if
Recommended Reading ASTM E23 & ASTM 370
- Our equipment is built for it, we can cut, chamfer, and stamp (A193 B7) much faster than a person can do it in the field.
- You pay for the material you need and not the crops.
- All our A193B7 or alloy threaded rod is stamped with a grade marking on the end so you know what it is and avoid the costly mistake of mixing up product or trying to figure out what is what.