Zeron Fastners
ASTM A325 Hex Bolts
ASTM A325 Hex Bolts are highly specialized heavy hex structural bolts intended for bolted connections in structural steel frameworks, where the strength of the connection is critical. These bolts are made from medium carbon steel that is quenched and tempered to achieve high tensile strength. The A325 specification ensures the bolts provide reliable performance in structural applications like bridges, buildings, and industrial machinery under high shear and tension loads. They are typically used in conjunction with A563 Grade DH or A194 Grade 2H heavy hex nuts and F436 structural washers. Zeron Fastners supplies A325 bolts in all types (Type 1, 2, and 3) and sizes for heavy-duty construction projects across India.
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ASTM A325 Type 1 Bolting Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.30 – 0.52 |
| Manganese (Mn) | 0.60 min |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.045 max |
| Silicon (Si) | 0.10 min |
| Boron (B) | Optional |
ASTM A325 Bolting Mechanical Properties
| Property | 1/2" to 1" Diameter (min) | 1-1/8" to 1-1/2" Diameter (min) |
|---|---|---|
| Tensile Strength | 120 ksi (827 MPa) | 105 ksi (724 MPa) |
| Yield Strength (0.2% Offset) | 92 ksi (634 MPa) | 81 ksi (558 MPa) |
| Elongation in 4D | 14% | 14% |
| Hardness (Brinell max) | 319 HB | 319 HB |