Zeron Fastners
ASTM A325 Flanges
ASTM A325 Flanges refers to pipe flanges (typically manufactured from ASTM A105 carbon steel or equivalent) used in piping systems that are secured by ASTM A325 high-strength structural bolting. While A325 specifies the quenched and tempered medium carbon steel bolt material, the term is used in this context to denote flange assemblies where the structural integrity of the joint is paramount. These high-strength bolt/flange assemblies are vital in industrial and utility piping where robust construction is required for sealing under high pressure and tension loads. Zeron Fastners supplies the necessary flange components and A325 bolting (hex bolts, stud bolts, and compatible nuts/washers) for these critical pipeline connections.
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ASTM A325 Type 1 Bolting Chemical Composition (Used with Flanges)
| 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 (Used with Flanges)
| 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 |