What is ASTM A 588 & ASTM A 242 Weathering steel

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What is Weathering steel? It is a type of alloy steels which were designed to remove the requirement for painting or other decorative rust shielding methodologies. This steel actually make a steady rust-like formation on surface if allowed to interact with weather for numerous years. In America, the brand name of this special type of steel is known as CORTEN Steel.
What is ASTM A 588 & ASTM A 242? ASTM A 588 steel is an American designation for Weathering steels; for the higher gauges. It covers three types of products based on its thickness.
4 inch or 100 mm Thick Steel: It has a yield strength of at least three hundred and forty Mega Pascal and ultimate tensile strength of four hundred and eighty Mega Pascal.
5 inch or 127 mm Thicker Steel: It has a yield strength of at least three hundred and twenty Mega Pascal and ultimate tensile strength of four hundred and sixty Mega Pascal.
8 inch or 203 mm Thickest Steel: It has a yield strength of at least two hundred and ninety Mega Pascal and ultimate tensile strength of four hundred and thirty Mega Pascal.
ASTM A 242 is the basic standard of Weathering Steel has three different grades:
75 inch or 19 mm Thick Steel: It has a yield strength of at least three hundred and forty Mega Pascal and ultimate tensile strength of four hundred and eighty Mega Pascal.
75-1 inch or 19-25 mm Thicker Steel: It has a yield strength of at least three hundred and twenty Mega Pascal and ultimate tensile strength of four hundred and sixty Mega Pascal.
5-4 inch or 38-102 mm Thickest Steel: It has a yield strength of at least two hundred and ninety Mega Pascal and ultimate tensile strength of four hundred and thirty Mega Pascal.
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