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Forged Quenched and Tempered Alloy Steel Threaded Eyebolts for low temperature applications
Adfast Component LTD proudly offers ASTM F541-compliant forged, quenched, and tempered alloy steel threaded eyebolts, engineered for superior toughness in low-temperature environments. These eyebolts feature a fine-grain structure achieved through advanced metallurgical processes, ensuring a low transition temperature to minimize brittle failure. With a maximum thread size of 2 1/2 inches (63.50 mm), these eyebolts are forged without welds, delivering unmatched reliability and durability.
Our ASTM F541 eyebolts undergo precise quenching and tempering processes to meet stringent quality standards. Each eyebolt is expertly machined, either before or after heat treatment, as per the manufacturer’s discretion. Designed to excel in demanding applications, these eyebolts are the ideal solution for industries requiring robust, low-temperature performance.
| Nominal Size, In. | Depth of Decarburization, Total + Partial, max | |
|---|---|---|
| in. | mm | |
| 0.250 to 0.375 | 0.030 | 0.762 |
| 0.4375 to 0.625 | 0.040 | 1.02 |
| 0.750 to 1.000 | 0.050 | 1.27 |
| 1.125 to 1.500 | 0.060 | 1.52 |
| 1.750 to 2.500 | 0.070 | 1.78 |
| Tensile strength, min, psi (MPa) | 95 000 (660) |
|---|---|
| Yield strength, min (0.2 % offset), psi (MPa) | 70 000 to 100 000 (485 to 690) |
| Elongation in 2 in. (50 mm), min, % | 22 |
| Reduction of area, min, % | 55 |
| Brinell hardnessA | 197 to 248 |
| Rockwell B hardnessA | 93 to 101 |
| Nominal Size and Number of Threads | Tension Stress Area, in.2 | Breaking Strength, min | Proof Load, min | ||
|---|---|---|---|---|---|
| lb | Mg | lb | Mg | ||
| 0.250-20 | 0.0318 | 3 020 | 1.37 | 1 220 | 0.55 |
| 0.3125-18 | 0.0524 | 5 000 | 2.27 | 2 000 | 0.91 |
| 0.375-16 | 0.0775 | 7 400 | 3.35 | 2 960 | 1.34 |
| 0.4375-14 | 0.1063 | 10 100 | 4.60 | 4 040 | 1.84 |
| 0.500-13 | 0.1419 | 13 500 | 6.1 | 5 400 | 2.44 |
| 0.625-11 | 0.226 | 21 500 | 9.8 | 8 600 | 3.92 |
| 0.750-10 | 0.334 | 32 000 | 14.5 | 12 800 | 5.8 |
| 0.875-9 | 0.462 | 44 000 | 20.0 | 17 600 | 8.0 |
| 1.000-8 | 0.606 | 58 000 | 26.5 | 23 200 | 10.6 |
| 1.125-7 | 0.763 | 72 000 | 32.5 | 28 800 | 13.0 |
| 1.250-7 | 0.969 | 92 000 | 42.0 | 36 800 | 16.8 |
| 1.500-6 | 1.405 | 133 000 | 60.0 | 53 200 | 24.0 |
| 1.750-5 | 1.90 | 180 000 | 82 | 72 000 | 32.8 |
| 2.000-4.5 | 2.50 | 238 000 | 108 | 95 200 | 43.2 |
| 2.500-4 | 4.00 | 380 000 | 172 | 152 000 | 68.8 |
Product Shall be Marked with our manufacturing trade mark Adfast Component LTD along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.
B18.15 – Type 1 Regular Pattern
B18.15 – Type 2 Shoulder Pattern
S1 —– Magnetic Particle Inspection