Newest FAQs
F1554 Grade 36 bolts are considered weldable, and the current version of the specification specifically states this. Section 6.4 of the ASTM 1554-15 specification reads as follows: 6.4 Weldability — Grade 36 anchor bolts are considered weldable F1554 also allows for weldable Grade 55 to be substituted at the manufacturer’s discretion. The specification also notes... Read more
Yes. There is a common misconception that ASTM F436 hardened washers are only available in the standard circular sizes. However, the F436 specification covers four defined styles of hardened washers, while also allowing for custom dimension washers as well. The four defined styles are: Circular Beveled Clipped Extra Thick These four styles each have specific tables... Read more
The ASTM A36 specification reads as follows: When the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service is to be utilized. See Appendix X3 of Specification A6/A6M for information on weldability. Appendix X3 of ASTM A6/6M states: Weldability is a term that usually refers... Read more
Tie rods are attached by sliding a gusset plate or knife plate, which is fastened to a structure, in between the ears of a clevis. A clevis pin or A325 structural bolt, is then assembled through the pin holes on the clevis and through the hole in the plate. Gusset plates are attached to the... Read more
A307 bolts, rods, and studs are not always weldable. For this grade to be weldable it must meet the supplementary requirement S1 of the ASTM A307 specification. This supplement provides assurances of weldability by additional chemical composition restrictions and by a carbon equivalent formula. In addition, “Because of the embrittling effects of welding temperatures on... Read more
Answer: SAE J429 is a Society of Automotive Engineers specification for bolts covering “the mechanical and material requirements for inch-series steel bolts, screws, studs, sems1, and U-bolts used in automotive and related industries in sizes to 1-1/2 in inclusive.” From SAE J429 regarding studs: “The term ‘stud’ as referred to herein applied to a cylindrical... Read more
In 2015, ASTM created a new, all-inclusive specification F3125 to cover A325 and A490 bolts under the same specification. There were many changes made to the specification, but it is still not acceptable to manufacture fully threaded rods in the A325 or A490 specifications. The new F3125 specification states in section 4.1.3: Bolts with thread... Read more
Per the RCSC section 16.2-12, multiple washers are permitted under the nut in order to resolve this problem.
Nuts that are over 2-1/2” diameter do not require a proof load test because most testing equipment in the industry is not large enough to test them effectively. In these cases, a hardness test is an acceptable alternative, unless a proof load test is specifically required by the buyer. Nuts this large would require in... Read more
Only structural steel bolts have an associated tension recommendation. The desired tension on a structural bolt is achieved by using a calibrated torque wrench and a Skidmore-Wilhelm load indicating device to tighten the nut with torque indicated by a verified bolt torque chart. ASTM does not have any recommendations in place for the proper tension... Read more
