American Standard A588GrA welding electrode selection and A588GrA cutting precautions

A588GrA is a high-strength low-alloy steel that is resistant to atmospheric corrosion in the American standard ASTMA 588/A588M-05. As alloying elements in this steel, there are Si, Mn, Cr, Ni, Cu, V, etc. The addition of V can play the role of grain refinement and precipitation strengthening, and other elements are solid solution strengthening.

The addition of these elements not only improves the strength of the steel, but also deteriorates the weldability of the steel. The steel is alloyed by adding Cu element to improve atmospheric corrosion resistance. The content of Cu is high, reaching 0.32%, and Cu element is an element that is easy to cause welding hot cracks.

Chemical composition analysis of A588GrA weathering steel plate:

A588GrA carbon C not more than 0.19

A588GrA Silicon Si: 0.3-0.65

A588GrA Manganese Mn: 0.8-1.25

A588GrA phosphorus P: not more than 0.03

A588GrA sulfur S: not more than 0.03

A588GrA Nickel Ni: not more than 0.4

A588GrA Chromium Cr: 0.4-0.65

A588GrA Copper Cu: 0.25-0.4

A588GrA Vanadium V: 0.02-0.1

Mechanical properties analysis of A588GrA weathering steel plate:

A588GrA thickness 8mm-100mm, yield strength not less than 340MPa, tensile strength not less than 480MPa

A588GrA thickness 100mm-130mm, yield strength not less than 320MPa, tensile strength not less than 460MPa

A588GrA thickness 130mm-200mm, yield strength not less than 290MPa, tensile strength not less than 430MPa

A588GrA is mainly used in steam generator support, pressure vessel support, reactor pressure vessel support, ring hanging, containment, etc. of nuclear power units.

A588GrA, A588GrB, A588GrC general construction and various construction machinery, such as drilling rigs, electric shovels, electric wheel dump trucks, mining vehicles, excavators, loaders, bulldozers, various cranes, coal mine hydraulic Brackets and other mechanical equipment and other structural parts.