ASTM A394

Standard Specification for Steel Transmission Tower Bolts, Zinc-Coated and Bare

English 1993
0.000
ASTM
Detailed Information

1.1 This specification covers the chemical and mechanical requirements of hexagon and square-head zinc-coated steel
bolts and atmospheric corrosion-resistant bolts, in nominal thread diameters of 1/2, 5/8, 3/4, and 1 in. for use in the
construction of transmission towers, substations. and similar steel structures. The various types of bolts covered in this
specification are:
1.1.1 Type 0-Zinc-coated bolts made of low or medium carbon steel.
1.1.2 Type 1-Zinc-coated bolts made of medium carbon steel. quenched and tempered.
1.1.3 Type 2-Zinc-coated bolts made from what is generally described as low-carbon martensite steel. quenched and
tempered.
1.1.4 Type 3-Bare (uncoated), quenched and tempered bolts made of steel having atmospheric corrosion-resistance
and weathering characteristics comparable to that of the steel covered in Specifications A 242/A 242M, A 588/A 588M, and A 709/A 709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition (see 5.4). When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

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