This specification covers two types of bolting grades quenched and tempered, manufactured from high strength alloy steel. ASTM A490 Bolts are intended for used in structural connections similar to ASTM A325/A325M but being produced from alloy steel instead of medium carbon steel, possed high tensile strength. There are two versions of this specification; ASTM A490 covering imperial sized high tensile bolting and A490M for metric sized bolts. ASTM A490 covers two grades Type 1 & Type 3, the later being weathering steel. Type 2 was withdrawn in 2002. Bolts under this specification are manufactured from 1/2" to 1-1/2" in imperial & from M12 to M36 in metric sizes. Ferrobend is a outstandig performer in providing ASTM A490 Type 1 & Type 3 weathering steel bolts with zinc, cadmium or dacromet coatings with EN 10204 Type 3.1 Certification.
| Grade | Class |
| Type 1 | Medium Carbon Alloy Steel |
| Type 2 | Withdrawn |
| Type 3 | Weathering Steel |
| Element | Heat Analysis % | Product Analysis % |
|---|---|---|
| Carbon | ||
| For sizes through 1-3/8" | 0.30 - 0.48 | 0.28 - 0.50 |
| For sizes 1-1/2" | 0.35 - 0.53 | 0.33 - 0.55 |
| Phosphorus | 0.040 | 0.045 |
| Sulfur | 0.040 | 0.045 |
| Element | Heat Analysis % | Product Analysis % |
|---|---|---|
| Carbon | ||
| Sizes 3/4" and smaller | 0.20 - 0.53 | 0.19 - 0.55 |
| Sizes larger than 3/4" | 0.30 - 0.53 | 0.28 - 0.55 |
| Manganese, min | 0.400 | 0.370 |
| Phosphorus, max | 0.035 | 0.040 |
| Sulfur, max | 0.040 | 0.045 |
| Copper | 0.20 - 0.60 | 0.17 - 0.63 |
| Chromium, min | 0.45 | 0.42 |
| Nickel, min | 0.20 | 0.17 |
| Molybdenum, min | 0.15 | 0.14 |
| Nominal Diameter, mm | Tensile Strength, min, Mpa | Yield Strength, min, Mpa | Elongation in 4D, min, % | Reduction in Area, min, % | ||
|---|---|---|---|---|---|---|
| M12 to M36, Inclusive | 1040 - 1210 | 940 | 14 | 40 | ||
| Nominal Diameter, inch | Tensile Strength, min, ksi | Yield Strength, min, ksi | Elongation in 4D, min, % | Reduction in Area, min, % | ||
|---|---|---|---|---|---|---|
| 1/2" to 1-1/2", Inclusive | 150 - 173 | 130 | 14 | 40 | ||
| Bolt Size, mm | Bolt Length*, mm | Brinell | Rockwell C | ||
|---|---|---|---|---|---|
| min | max | min | max | ||
| M12 to M24, inclusive | Less than 2D | 311 | 352 | 33 | 39 |
| M12 to M24, inclusive | 2D and over | -- | 352 | -- | 39 |
| M25 to M36, Inclusive | Less than 3D | 311 | 352 | 33 | 39 |
| M25 to M36, Inclusive | 3D and over | -- | 352 | -- | 39 |
| Bolt Size, mm | Bolt Length*, mm | Brinell | Rockwell C | ||
|---|---|---|---|---|---|
| min | max | min | max | ||
| 1/2" to 1", inclusive | Less than 2D* | 311 | 352 | 33 | 39 |
| 1/2" to 1", inclusive | 2D and over | -- | 352 | -- | 39 |
| 1-1/8" to 1-1/2", inclusive | Less than 3D | 311 | 352 | 33 | 39 |
| 1-1/8" to 1-1/2", inclusive | 3D and over | -- | 352 | -- | 39 |
Type 1 and Type 3 bolts shall be heat treated by quenching in oil from the austenitic temperature and then tempered by reheating to a temperature of not less then 800°F.
| Bolt Type and Finish | Nut Class and Finish Specification |
|---|---|
| Plain (noncoated) | ASTM A563-DH, DH3, plain (uncoated) |
| Coated in accordance to ASTM F1136, Grade 3 | ASTM A563, coated in accordance to ASTM F1136, Grade 5 |
| Weathering steel | ASTM A563-DH3, weathering steel |
| Bolt Type and Finish | Washer Finish |
|---|---|
| Plain (noncoated) | Plain (uncoated) |
| Coated in accordance to ASTM F1136, Grade 3 | Coated in accordance to ASTM F1136, Grade 3 |
| Weathering steel | Weathering steel |
| Grade | Marking |
|---|---|
| A490 / A490M Type 1 | A490 / A490M |
| A490 / A490M Type 3 | A490 / A490M |