ASTM A325
ASTM A325 Galvanized Bolts and Nuts
A325 Types
| TYPE 1 | Medium carbon, carbon boron, or medium carbon alloy steel. |
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| TYPE 2 | Withdrawn November 1991. |
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| TYPE 3 | Weathering steel. |
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| T | Fully threaded A325. (Restricted to 4 times the diameter in length) |
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| M | Metric A325. |
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A325 Connection Types
| SC | Slip critical connection. |
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| N | Bearing type connection with threads included in the shear plane. |
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| X | Bearing-type connection with threads excluded from the shear plane. |
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A325 Mechanical Properties
| Size | Tensile, ksi | Yield, ksi | Elong. %, min | RA %, min |
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| 1⁄2 – 1 | 120 min | 92 min | 14 | 35 |
| 11⁄8 – 11⁄2 | 105 min | 81 min | 14 | 35 |
A325 Type 1 Chemical Properties
| Heat Analysis | 120ksi, % | 150ksi, % |
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| Carbon | 0.30 – 0.52 | 0.30 – 0.48* |
| Manganese | 0.60 min | 0.60 min |
| Phosphorus | 0.035 max | 0.035 max |
| Sulfur | 0.040 max | 0.040 max |
| Silicon | 0.15 – 0.30 | – |
| Boron | 0.003 max | 0.003 max |
| Copper | – | – |
| Nickel | – | – |
| Chromium | – | – |
| Molybdenum | – | – |
| *Carbon 0.35-0.53% for 1-1/2” A490/150ksi bolts |
A325 Type 3 Chemical Properties
| Heat Analysis | 120ksi, % Comp A | 120ksi, % Comp B | 120ksi, % Index | 150ksi, % Index |
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| Carbon | 0.33 – 0.40 | 0.38 – 0.48 | 0.30 – 0.52 | 0.30 – 0.53 |
| Manganese | 0.90 – 1.20 | 0.70 – 0.90 | 0.60 min | 0.60 min |
| Phosphorus | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
| Sulfur | 0.040 max | 0.040 max | 0.040 max | 0.040 max |
| Silicon | 0.15 – 0.30 | 0.30 – 0.50 | | |
| Copper | 0.25 – 0.45 | 0.20 – 0.40 | 0.20 – 0.60 | 0.20 – 0.60 |
| Nickel | 0.25 – 0.45 | 0.50 – 0.80 | 0.20 min* | 0.20 min* |
| Chromium | 0.45 – 0.65 | 0.50 – 0.80 | 0.20 min | 0.20 min |
| Molybdenum | | 0.06 max | 0.10 min* | 0.10 min* |
| *Either Nickel or Molybdenum must be present in the amount specified *Corrosion Index based on ASTM Guide G101 |
A325 Recommended Hardware
| Nuts | Washers |
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| Type 1 | Type 3 | Type 1 | Type 3 |
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| Plain | Galvanized | Plain |
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| A563C, C3, D, DH, DH3 | A563DH | A563C3, DH3 | F436-1 | F436-3 |
TFIT Fasteners Provide the A325 covers high strength primary bolts utilized in underlying steel associations. A325s have a weighty hex head, a full body measurement, and are regularly short in generally length since they are interfacing steel to steel.
Dissimilar to other ASTM grades, A325 is explicit in the substance and mechanical prerequisites, yet in addition in the permitted design. These bolts range in distance across from 1/2″ through 1-1/2″ and are fabricated from a medium-carbon or medium-carbon compound steel that is extinguished and tempered to foster the ideal mechanical properties.
