ASTM A325
ASTM A325
ASTM A325 Type 1, Type 3 Bolts, Stud Bolts, Threaded Rods
- Introduction
- Grades
- Chemical Composition Type 1 Type 3
- Mechanical Properties Metric Imperial
- Hardness Metric Imperial
- Recommended Nuts
- Recommended Washers
- Marking
ASTM A325 / A325M - Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength
This specification covers two types of quenched and tempered steel heavy hex bolts in metric and imperial sizes for structural purpose. Metric size bolts are produced from M12 to M36 as per ASTM A325M & imperial size bolts are produced from 1/2" to 1-1/2" as per ASTM A325. These boltings are intended for used in structural connections. FerroBend manufactures and supplies ASTM A325 Type 1 & Type 3 heavy hex bolts with EN 10204 Type 3.1 Certification.
ASTM A325 Grades and Material Class
| Grade | Class | |||||
| Type 1 | Carbon Steel, Carbon Boron Steel, Alloy Steel or Alloy Boron Steel | |||||
| Type 2 | Withdrawn | |||||
| Type 3 | A | B | C | D | E | F |
ASTM A325 Type 1 Chemical Composition
| Element | ||||
|---|---|---|---|---|
| Product Analysis % | ||||
| Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel | |
| Carbon | 0.28 - 0.55 | 0.28 - 0.55 | 0.28 - 0.55 | 0.28 - 0.55 |
| Manganese | 0.57 min | 0.57 min | 0.57 min | 0.57 min |
| Phosphorus | 0.048 max | 0.048 max | 0.040 max | 0.040 max |
| Sulfur | 0.058 max | 0.058 max | 0.045 max | 0.045 max |
| Silicon | 0.13 - 0.32 | 0.08 - 0.32 | 0.13 - 0.37 | 0.13 - 0.37 |
| Boron | -- | 0.0005 - 0.003 | -- | 0.0005 - 0.003 |
ASTM A325 Type 3 Chemical Composition
| Element | ||||||
|---|---|---|---|---|---|---|
| Product Analysis % | ||||||
| A | B | C | D | E | F | |
| Carbon | 0.31 - 0.42 | 0.36 - 0.50 | 0.14 - 0.26 | 0.14 - 0.26 | 0.18 - 0.27 | 0.19 - 0.26 |
| Manganese | 0.86 - 1.24 | 0.67 - 0.93 | 0.76 - 1.39 | 0.36 - 1.24 | 0.56 - 1.04 | 0.86 - 1.24 |
| Phosphorus | 0.040 max | 0.040 max | 0.040 max | 0.040 max | 0.040 max | 0.040 max |
| Sulfur | 0.045 max | 0.045 max | 0.045 max | 0.045 max | 0.045 max | 0.045 max |
| Silicon | 0.13 - 0.37 | 0.25 - 0.55 | 0.13 - 0.37 | 0.20 - 0.55 | 0.13 - 0.37 | 0.13 - 0.37 |
| Copper | 0.22 - 0.48 | 0.17 - 0.43 | 0.17 - 0.53 | 0.27 - 0.53 | 0.27 - 0.63 | 0.17 - 0.43 |
| Nickel | 0.22 - 0.48 | 0.47 - 0.83 | 0.22 - 0.53 | 0.47 - 0.83 | 0.27 - 0.63 | 0.17 - 0.43 |
| Chromium | 0.42 - 0.68 | 0.47 - 0.83 | 0.27 - 0.53 | 0.45 - 1.05 | 0.55 - 0.95 | 0.42 - 0.68 |
| Vanadium | -- | -- | 0.010 min | -- | -- | -- |
| Molybdenum | -- | 0.07 max | -- | 0.11 max | -- | -- |
| Titanium | -- | -- | -- | 0.06 max | -- | -- |
ASTM A325 Mechanical Requirement (Metric)
| Nominal Diameter, mm | Tensile Strength, min, Mpa | Yield Strength, min, Mpa | Elongation in 4D, min, % | Reduction in Area, min, % |
|---|---|---|---|---|
| M12 to M36, Inclusive | 830 | 660 | 14 | 35 |
ASTM A325 Mechanical Requirement (Imperial)
| Nominal Diameter, mm | Tensile Strength, min, ksi | Yield Strength, min, ksi | Elongation in 4D, min, % | Reduction in Area, min, % | ||
|---|---|---|---|---|---|---|
| 1/2" to 1", Inclusive | 120 | 92 | 14 | 35 | ||
| Over 1 to 1-1/2" | 105 | 81 | 14 | 35 | ||
Hardness Requirements for ASTM A325 Bolts (Metric)
| Bolt Size, mm | Bolt Length, mm | ||||
|---|---|---|---|---|---|
| Brinell | Rockwell C | ||||
| Min | Max | Min | Max | ||
| M12 to M24, inclusive | Less than 2D 2D and over |
253 -- |
319 319 |
25 -- |
34 34 |
| M25 to M36, Inclusive | Less than 3D 3D and over |
253 -- |
319 319 |
25 -- |
34 34 |
Hardness Requirements for ASTM A325 Bolts (Imperial)
| Bolt Size, Inch | Bolt Length, Inch | ||||
|---|---|---|---|---|---|
| Brinell | Rockwell C | ||||
| Min | Max | Min | Max | ||
| 1/2" to 1", inclusive | Less than 2D 2D and over |
253 -- |
319 319 |
25 -- |
34 34 |
| 1-1/8" to 1-1/2", inclusive | Less than 3D 3D and over |
223 -- |
286 286 |
19 -- |
30 30 |
where D is nominal diameter or thread size
Recommended Nuts
| Bolt Type and Finish | Nut Class & Finish Specification |
|---|---|
| Plaing (Non Coated) | ASTM F563/F563M Grade 8S or 8S3, Plain (Non Coated) |
| Zinc Coated | ASTM F563/F563M Grade 10S, Zinc Coated |
| Coated in accordance with ASTM F1136M, Grade 3 | ASTM F563/F563M Grade 10S, Coated in accordance with ASTM F1136 |
| Plain | ASTM F563/F563M Grade 8S3, Plain |
Recommended Washers
| Bolt Type and Finish | Washer Finish |
|---|---|
| Plaing (Non Coated) | ASTM F436/F436M, Plain (Non Coated) |
| Zinc Coated | ASTM F436/F436M, Zinc Coated |
| Coated in accordance with ASTM F1136M, Grade 3 | ASTM F436/F436M, Coated in accordance with ASTM F1136 |
| Plain | ASTM F436/F436M, Plain |
ASTM A325 Type 1 & Type 3 Bolt Marking
| Grade | Marking Details |
|---|---|
| Type 1 | Type 1 bolts shall me marked "A325M" and "8S". In addition, bolts marked "8.8S" shall be an acceptable marking provided they also meet the requirements of ISO 7412. |
| Type 3 | Type 1 bolts shall me marked "A325M" and "8S3". In addition, bolts marked "8.8S" shall be an acceptable marking provided they also meet the requirements of ISO 7412. The use of additional distinguishing marks to indicate the bolts are weathering steel shall be the manufacturer's discretion. |
ASTM A325 Products
ASTM A325 PRODUCTS
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