TORQUE ASTM A325
| Bolt Size | TPI | Tension MIN | Tension MAX | Tightening Torque Range (ft lbs) (Min-Ma ... |
| 1/2" | 13 | 12,000 | 14,000 | 50 - 58 |
| 5/8" | 11 | 19,000 | 23,000 | 99 - 120 |
| 3/4" | 10 | 28,000 | 34,000 | 175 - 213 |
| 7/8" | 9 | 39,000 | 47,000 | 284 - 343 |
Full Answer
What is the difference between an A325 and A490 bolt?
Answer (1 of 2): Grade A325 can be made of Type 1 medium carbon steel or Type 3 weathering steel. An important distinction between A325 and A490 is that it A325 Type 1 bolts can be galvanized. A325 bolts have a minimum tensile strength of 120,000 PSI for one inch or fewer diameters and 105,000 PS...
How to determine A325 structural bolt length?
Itis the sum of the thicknesses of all the partsbeing joined exclusive of washers • Thread length is the threaded portion of the bolt • Boltlength is the distance frombehind the bolt head to the end of the bolt (AISC& NISD 2000) Parts of the Bolt Assembly
How many A325 bolts to spot check?
Sample 2 bolt, washer & nut assemblies (02560.60 (a)) 2. Assemble fastener with 3-5 threads within the grip 3. Snug tight (10% of Required Fastener Tension in Table 560-1); Tolerance= -0 kips, +2 kips 4. Mark the bolt, nut & plate 5. Tighten to Required Fastener Tension & record torque (torque must not exceed T=0.25PD) (P in lbs, D in ft) 6.
How to measure the torque on bolts?
The torque value of a bolt can be checked in 3 ways:
- The movement check:
- The loosening check:
- The marking check:
What is the torque spec on a A325 bolt?
A325Bolt SizeTPITightening Torque RangeMin – Max1⁄21350 – 585⁄81199 – 1203⁄410175 – 2137 more rows
What torque should bolts be?
US Recommended Bolt TorqueSizeRecommended TorqueGrade 218-8 S/S5/8"73933/4"1251287/8"12919413 more rows
What is the minimum tension for a 7 8 A325 bolt?
TORQUE ASTM A325Bolt SizeTPITension MIN7/8"939,0001"851,0001 1/8"756,0001 1/4"771,0005 more rows
How much weight can a A325 bolt hold?
ASTM A325 bolts are available in diameters from ½ to 1-1/2 inch diameters (for diameters greater than 1-1/2, ASTM A449 specifications should be considered) with a minimum tensile strength of 120,000 PSI for diameters one inch and less and 105,000 PSI for sizes over one inch to 1-1/2.
How do you calculate bolt torque?
The basic formula T = K x D x P stated earlier takes these factors into account and provides users with a starting point for establishing an initial target tightening torque.
How do you calculate torque to tighten a bolt?
1:054:38how to calculate bolt tightening torque - YouTubeYouTubeStart of suggested clipEnd of suggested clipMean value of nut factor is 0.2. Now we will calculate preload which is basically tensile load inMoreMean value of nut factor is 0.2. Now we will calculate preload which is basically tensile load in the bolt. If we load the bolt up to its yield strength then bolt will have permanent deformation.
Are A325 bolts high strength?
ASTM A325 covers high strength structural bolts used in structural steel connections. A325s have a heavy hex head, a full body diameter, and are normally short in overall length since they are connecting steel to steel.
Are A325 bolts slip critical?
“SC” signifies a slip-critical connection where the bolts are not being used in shear, but instead, the tension from the connection resists the shearing force. You simply require the same standard A325 heavy hex structural bolt but will be using them in three different connection types. Slip-critical connection.
Do structural bolts require washers?
It is known that the required grade of washer to be used with an A325 or A490 structural bolt is an ASTM F436 hardened washer, however whether or not a washer is required to be used in a given application is often brought into question.
What is meant by A325 bolts?
ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1⁄2 to 11⁄2 inches (13 to 38 mm) in diameter.
What is a A325 structural bolt?
ASTM A325 structural bolts are heavy hex bolts made of medium carbon steel with a flat bearing surface, washer faced, and chamfered point. They are commonly used in structural steel joints in heavy construction and available in diameters ranging from 1/2” up to 1-1/2”.
What are A325 bolts used for?
The A325 bolt strength, or SAE grade 5 bolt strength, is usually used for structural bolting projects.