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ANSWER: ASTM A1008 SS steel is structural steel, the first “S” means structural.
ASTM A1008 SS steel has nine grades, they are : A1008 SS grade 25(170), A1008 SS grade 30(205), A1008 SS grade 33(230), A1008 SS grade 40(275), A1008 SS grade 45(310), A1008 SS grade 50(340), A1008 SS grade 60(410), A1008 SS grade 70(480), A1008 SS grade 80(550), A1008 SS grade 33(230) and A1008 SS grade 40(275) has type 1 and type 2.
The carbon composition of A1008 SS grade 33(230) type 2 and A1008 SS grade 40(275) type 2 is not more than 0.15%, all the others are is not more than 0.20%.
The yield strength of A1008 SS grade 25(170) is min 170MPa, tensile strength is min 290 Mpa, Elongation 50mm is min 26%;
The yield strength of A1008 SS grade 30(205) is min 205MPa, tensile strength is min 310 Mpa, Elongation 50mm is min 24%;
The yield strength of A1008 SS grade 33(230) type 1 is min 230MPa, tensile strength is min 330 Mpa, Elongation 50mm is min 22%;
The yield strength of A1008 SS grade 40(275) type 1 is min 275MPa, tensile strength is min 360 Mpa, Elongation 50mm is min 20%;
The yield strength of A1008 SS grade 45(310) type 1 is min 310MPa, tensile strength is min 410 Mpa, Elongation 50mm is min 20%;
