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Carbon Steel, Alloy Steel And Weatherng Steel Structural Bolts, Hex Cap Screws and Studs Heat Treated to 150 ksi Minimum Tensile Strength
| Type | Description |
|---|---|
| Type 1 | Medium carbon alloy steel |
| Type 2 | Withdrawn in 2002 |
| Type 3 | Weathering steel |
| Element | Alloy Steel | Alloy Steel with Boron Addition | ||
|---|---|---|---|---|
| Heat Analysis, % | Product Analysis, % | Heat Analysis, % | Product Analysis, % | |
| C For sizes through 13⁄8 in. | 0.30-0.48 | 0.28-0.50 | 0.30-0.48 | 0.28-0.50 |
| C For size 11⁄2 in. | 0.35-0.53 | 0.33-0.55 | 0.35-0.53 | 0.33-0.55 |
| P | 0.040 | 0.045 | 0.040 | 0.045 |
| M | 0.60 | 0.57 | 0.60 | 0.57 |
| S, max | 0.040 | 0.045 | 0.040 | 0.045 |
| B | . . . | . . . | 0.0005-0.003 | 0.0005-0.003 |
| Alloying Elements | A | A | A | A |
| Element | Heat Analysis, % | Product Analysis, % |
|---|---|---|
| C for Sizes 0.75 in. and smaller | 0.20-0.53 | 0.19-0.55 |
| C for Sizes larger than 0.75 in. | 0.30-0.53 | 0.28-0.55 |
| M, min | 0.40 | 0.37 |
| P, max | 0.035 | 0.040 |
| S, max | 0.040 | 0.045 |
| Cu | 0.20-0.60 | 0.17-0.63 |
| Cr, min | 0.45 | 0.42 |
| Ni, min or | 0.20 | 0.17 |
| Mo, min | 0.15 | 0.14 |
| Size, in. | Nominal Length, in. | Brinell | Rockwell C | ||
|---|---|---|---|---|---|
| min | max | min | max | ||
| 1⁄2 to 1, incl. | Less than 2D 2D and longer | 311 | 352 | 33 | 38 |
| . . . | 352 | . . . | 38 | ||
| Over 1 to 11⁄2, incl | Less than 3D 3D and longer | 311 | 352 | 333 | 38 |
| . . . | 352 | . . . | 38 | ||
| Bolt Size, Threads per Inch, and Series Designation | Stress Area,A in.2 | Tensile Load,B lbf | Proof Load,Length Measurement Method | Alternative Proof Load,B lbf Yield Strength Method | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||||||||
| 1⁄2 -13 UNC | 0.142 | 21 300 | 24 600 | 17 050 | 18 500 | ||||||||||||
| 5⁄8-11 UNC | 0.226 | 33 900 | 39 100 | 27 100 | 29 400 | ||||||||||||
| 3⁄4-10 UNC | 0.334 | 50 100 | 57 800 | 40 100 | 43 400 | ||||||||||||
| 7⁄8-9 UNC | 0.462 | 69 300 | 79 950 | 55 450 | 60 100 | ||||||||||||
| 1-8 UNC | 0.606 | 90 900 | 104 850 | 72 700 | 78 800 | ||||||||||||
| 11⁄8 -7 UNC | 0.763 | 114 450 | 132,000 | 91 550 | 99 200 | ||||||||||||
| 11⁄4 -7 UNC | 0.969 | 145 350 | 167 650 | 116 300 | 126,000 | ||||||||||||
| 13⁄8 -6 UNC | 1.155 | 173 250 | 199 850 | 138 600 | 150 200 | ||||||||||||
| 11⁄2 -6 UNC | 1.405 | 210 750 | 243 100 | 168 600 | 182 600 | ||||||||||||
| |||||||||||||||||
| Bolt Size, Threads per Inch, and Series Designation | Tensile Load,B lbf | Yield Strength (0.2 % offset), min, psi | Elongation in 2 in. or 50 mm, min, % | Reduction of Area, min, % | |
|---|---|---|---|---|---|
| min | max | ||||
| 1⁄2 to 1 1⁄2 in., incl | 150,000 psi | 173,000 psi | 130,000 psi | 14 | 40 |
Product Shall be Marked with our manufacturing trade mark 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.