Abstract of ASTM A490M

HIGH-STRENGTH STEEL BOLTS, CLASSES 10.9 AND 10.9.3, FOR STRUCTURAL STEEL JOINTS [METRIC]

English 1993
0.000
ASTM
Detailed Information

1.1 This specification covers the chemical and mechanical requirements of quenched and tempered steel bolts, in nominal thread diameters M16 to M36, inclusive. These bolts are intended for use in structural joints that are comparable to those made under the Specification for Structural Joints Using ASTM A325 or A490 Bolts issued by the Research Council on Structural Connections of the Engineering Foundation. The various types of bolts covered by this specification are:
1.1.1 Type 1 – Bolts made of alloy steel, supplied in nominal thread diameters M16 to M36, inclusive.
1.1.2 Type 2 – Bolts made from what is generally described as low-carbon martensite steel, supplied in nominal thread diameters M16 to M24, inclusive.
1.1.3 Type 3 – Bolts in nominal thread diameters M16 to M36, inclusive, having atmospheric corrosion resistance and weathering characteristics comparable to that of the steels covered in ASTM Specifications A588/A58BM, A242/A242M, and A709/A709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition. See 6.3. When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications.

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