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Astm a325 bolt torque chart

A325 torque 2025

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The document provides a comprehensive chart of suggested starting torque values for various bolt sizes and grades, including ASTM A307, SAE Grade 2, ASTM A325, ASTM A449/SAE Grade 5, ASTM A490, ASTM A193 Grade B7, and ASTM A354 Grade BD/SAE Grade 8. It details the tightening torque in foot-pounds based on bolt size, thread per inch (TPI), proof load, and clamp load for different surface conditions (waxed, galvanized, plain). The document emphasizes that these values are guidelines and that actual torque should be determined through experimentation due to variables affecting the torque-tension relationship.

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What is a grade A325 bolt equivalent to?

As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards. The A325 bolt strength, or SAE grade 5 bolt strength, is usually used for structural bolting projects.

Are A325 bolts the same as Grade 5?

While these two bolts are virtually identical in terms of chemical and physical strengths and properties, there are several differences between the two. The Grade 5 specification falls under the Society of Automotive Engineers (SAE) classification system, while A325 is an ASTM specification.

What is the torque spec on an A325 bolt?

ASTM A325 Bolt SizeTPITightening Torque Range (ft lbs) (Min - Max) Galv+Waxed 1 8 425 - 508 118 7 600 - 722 114 7 844 - 1,0216 more rows

Is A325 stronger than Grade 8?

A325 bolts are typically manufactured from a medium carbon steel (although they can be made from an alloy) while SAE grade 8 bolts are made from a medium carbon alloy steel. Grade 8 bolts are significantly stronger than an A325. An ASTM specification with similar strength properties to grade 8 is ASTM A490.

How do you calculate the torque of a bolt tightening?

2:40 4:37 Area we can rewrite proof float formula for non-permanent joint as. And for permanent joint it canMoreArea we can rewrite proof float formula for non-permanent joint as. And for permanent joint it can be written. As here symbol sigma is the proof strength in mega pascal.

What grade nuts go with A325 bolts?

The recommended grade of nut for an ASTM A325 structural bolt is ASTM A563 Grade D, DH, or C. ASTM A194 2H is also an acceptable substitute. These ASTM grades are all high strength and go through a heat treating process required to develop their mechanical characteristics.

What is the torque on an A325 bolt?

STV ASTM A325 (Structural) Bolt SizeTPITightening Torque Range (ft.lbs / min-max) 1 8 850 1,015 1 1/8 7 1,050 1,255 1 14 7 1,480 1,770 1 3/8 6 1,950 2,3406 more rows

A325 torque 2025

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