ASTM A394 Type 1 is a standard material specification covering chemical and mechanical requirements of hexagon and square-head zinc-coated steel bolts made from quenched and tempered medium carbon steel, in nominal thread diameters of 1⁄2, 5⁄8, 3⁄4, 7⁄8 and 1 in. for use in the construction of transmission towers, substations, and similar steel structures.
Find chemical composition, mechanical properties, shear strength, marking, recommended nuts, surface finish or coating and other reference standards for ASTM A394 Type 1 Bolts.
| Element | Grade Type 1 |
|---|---|
| Carbon | 0.28 – 0.55 |
| Manganese, max | 0.60 min |
| Phosphorus, max | 0.048 max |
| Sulfur, max | 0.058 max |
| Nominal size, Inch. | Minimum Tensile Load, lbf | Hardness |
|---|---|---|
| Type 1 | Type 1 | |
| 1/2 | 17 050 | 25 – 34 Rockwell C |
| 5/8 | 27 100 | |
| 3/4 | 40 100 | |
| 7/8 | 55 450 | |
| 1 | 72 700 |
| Grade | Nut Grade | Coating |
|---|---|---|
| Type 1 | A563 Grade DH | Hot Dip or Zinc Coating |
| ASTM A563 | Specification for Carbon and Alloy Steel Nuts |
| ASTM F436 | Specification for Hardened Steel Washers |
| ASTM F2329 | Specification for Zinc Coating, Hot-Dip |
| ASME B1.1 | Unified Screw Threads |
| ASME B18.2.1 | Square and Hex Bolts and Screws |