美国螺栓及栓钉规范介绍PPT.ppt

美国螺栓及栓钉规范介绍 * Relative specifications on bolts A153 - Hot dip galvanizing specification A193 - Alloy steel and stainless steel bolting materials for high temperature service A194 - Carbon and alloy nuts for bolts for high pressure and high temperature service A307 - Carbon steel bolts and studs ranging from 1/4 through 4 diameter A320 - Alloy steel and stainless steel bolting materials for low temperature service A325 - Structural bolts, steel, heat treated, 120/105 ksi minimum tensile strength A354 - Quenched and tempered alloy bolts, studs, and other externally threaded fasteners A449 - Quenched and tempered steel bolts and studs A490 - Structural bolts, alloy steel, heat treated, 150 ksi tensile strength A563 - Standard specification for carbon and alloy steel nuts F1554 - Anchor bolts designed to anchor structural supports to concrete foundations F2329 - New specification covering hot dip galvanizing * High strength bolt as per ASTM * Item Grade 8.8 10.9 4.6/5.8/9.8/12.9 bolt A325M A490M F568M nut A563M washer F436M DTI F959M Class 8.8 high strength bolt as per A325M * Type Description Remark Type 1 Bolts made of medium-carbon steel Provided in most case Type 2 Bolts made from what is generally described as low-carbon martensite steel Withdrawn November 1991 Type 3 Bolts made of steel having atmospheric corrosion resistance and weathering characteristics Class 8.8 high strength bolt as per A325M * Ordinary ordering/delivery condition 1 heavy hex structural bolts shall be furnished 2 Zinc-coated bolts and nuts shall be shipped in the same container Class 8.8 high strength bolt as per A325M * Bolt Nut Washer DTI type finish class finish finish class finish Type 1 2 Plain (noncoated) 8S or 8S3 plain plain 8.8 Plain Type 1 2 Zinc-coated 8s Zinc-coated Zinc-coated 8.8 Zinc-coated Type 3 plain 8S3 plain Plain(weathering steel) 8.8 Plain Chemical requirements exacted from F568M * Mechanical requirements exacted from F568M * * Class 10.9 high strength b