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ASTM A325 8.8 Grade HDG Heavy Hex Head Bolt M20X100 Hex Head bolts
Product Description
Heavy bolts have a head it is larger than a standard (finish) hex head. Standard heavy hex bolts are made by middle carbon steel. The large head offers a greater bearing surface that distributes the clamping load over a greater area.
This Specification covers two types of quenched and tempered steel heavy hex structural bolts having a minimum tensile strength of 120ksi for size 1.0in and less and 105 ksi for size over 1.0 to 1-1/2 in inclusive.
The bolts are intended for use in structural connections. these connections are covered under the requirements of the specification for structural joints using ASTM A32 OR A490 Bolts,approved by the research Council on Structural connections. Endorsed by the Amercican Institute of steel Construction and by the industrial Fasteners Institure.
| Element | Carbon Steel | Boron Steel |
|---|---|---|
| C | 0.30 - 0.52% | 0.30 - 0.52% |
| Mn min | 0.60% | 0.60% |
| P, max | 0.040% | 0.040% |
| S, max | 0.050% | 0.050% |
| Si | 0.15-0.30% | 0.10 - 0.30% |
| B | 0.0005 - 0.003% |
A325 Mechanical Properties
| Bolt Dia,in | TensileStrength ksi (MPa) | Yield Strength ksi MPa) | Elongation %, min | Reduction of area %, min |
|---|---|---|---|---|
| 1⁄2 to 1 | 120.000 (825) | 92.000 | 14 | 35 |
| Over 1 to 11⁄2 | 105.000 (725) | 81.000 | 14 | 35 |
A325 Recommended Hardware
| Nuts | Washers | |
|---|---|---|
| Type 1 | Type 1 | |
| Plain | Galvanized | |
| A563C, C3, D, DH, DH3 | A563DH | F436-1 |
| Notes: Nuts conforming to A194 Grade 2H are a suitable substitute for use with A325 heavy hex structural bolts. The ASTM A563 Nut Compatibility Chart has a complete list of specifications. | ||
Advantages
1.Professional Manufacturer: Our factory professional supply A325 AND A490 Bolt, 100% satisfy Products Mechanical Properties
2.Quality is guaranteed:Can test goods by third party test company,We also can provide MTC, 3.1certificate.
3.Cost effective: Competitive prices with professional factory supply A325 AND A325M, Perfect fastening solution with 10 years experiences.
4. Haina Fastener Can produce them from 1/2-1-1/2, Can make your logo or size on the head.
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