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ASTM A325
Scope
The ASTM A325 specification covers high strength heavy hex structural bolts from 1/2″ diameter through 1-1/2″ diameter. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Refer to the Structural Bolts page of our site for thread lengths and other related dimensions.
This specification is applicable to heavy hex structural bolts only. For bolts of other configurations and thread lengths with similar mechanical properties, see Specification A449.
Bolts for general applications, including anchor bolts, are covered by Specification A 449. Also refer to Specification A 449 for quenched and tempered steel bolts and studs with diameters greater than 1-1/2″ but with similar mechanical properties.
A325 Types
TYPE 1 | Medium carbon, carbon boron, or medium carbon alloy steel. |
---|---|
TYPE 2 | Withdrawn November 1991. |
TYPE 3 | Weathering steel. |
T | Fully threaded A325. (Restricted to 4 times the diameter in length) |
M | Metric A325. |
A325 Connection Types
SC | Slip critical connection. |
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N | Bearing type connection with threads included in the shear plane. |
X | Bearing-type connection with threads excluded from the shear plane. |
A325 Mechanical Properties
Size | Tensile, ksi | Yield, ksi | Elong. %, min | RA %, min |
---|---|---|---|---|
1/2 - 1 | 120 min | 92 min | 14 | 35 |
1-1/8 - 1-1/2 | 105 min | 81 min | 14 | 35 |
A325 Chemical Properties
Type 1 Bolts | ||||
---|---|---|---|---|
Element | Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel |
Carbon | 0.30 - 0.52% | 0.30 - 0.52% | 0.30 - 0.52% | 0.30 - 0.52% |
Manganese, min | 0.60% | 0.60% | 0.60% | 0.60% |
Phosphorus, max | 0.040% | 0.040% | 0.035% | 0.035% |
Sulfur, max | 0.050% | 0.050% | 0.040% | 0.040% |
Silicon | 0.15-0.30% | 0.10 - 0.30% | 0.15 - 0.35% | 0.15 - 0.35% |
Boron | 0.0005 - 0.003% | 0.0005 - 0.003% | ||
Alloying Elements | * | * | ||
* Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum range given for the content of alloying elements exceeds one of more of the following limits: Manganese, 1.65%, silicon, 0.60%, copper, 0.60%, or in which a definite range or a minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99%, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium or any other alloying elements added to obtain a desired alloying effect. |
A325 Recommended Hardware
Nuts | Washers | |||
---|---|---|---|---|
Type 1 | Type 3 | Type 1 | Type 3 | |
Plain | Galvanized | Plain | ||
A563C, C3, D, DH, DH3 | A563DH | A563C3, DH3 | F436-1 | F436-3 |
Note: 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. |
ASTM Specifications for Bolt Fasteners
A193 | - Alloy steel and stainless steel bolting materials for high temperature or high pressure service. |
A307 |
|
A320 |
|
A325 |
|
A354 |
|
A449 |
|
A453 |
|
A490 |
|
F568 | - Standard for metric bolts, screws and studs that are used in general engineering applications |
F593 |
|
F1554 |
|
ASTM Specifications for Nuts
ASTM Specifications for Washers
F436 | - Specification for Hardened Steel Washers , carbon steel, steel, washers, weathering steel, Hardened steel washers |
F844 |
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F959 |
|
Astm A325 Structural bolts Application Industries
Sunflex Metal Industries are engaged in manufacturing of robust quality of Astm A325 Structural bolts. These Astm A325 Structural bolts are widely used in the following industries:
Mining Industries
Transport Industries- Rail and Road
Construction Industries / Building Systems
Manufacturing Industries
Agriculture Industries
Energy Industries
Water Industries
Automotive Industries
Ship Building Industries
Nuclear Power Plant
Paper & Pulp Industries
Sugar Industries
Engineering Cement Industries
Petro-Chemical Industries
Food Industries
Oil & Gas Industries
Chemical & Pharmaceutical Industries
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