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ANSWER: ASTM A1008 HSLAS steel is Low alloy high strength steel, “HS” means high strength , “LA” means low alloy.
ASTM A1008 HSLAS steel has nine grades, they are :A1008 HSLAS grade 45(310), A1008 HSLAS grade 50(340), A1008 HSLAS grade 50(340), A1008 HSLAS grade 55(380) , A1008 HSLAS grade 60(410), A1008 HSLAS grade 65(450), A1008 HSLAS grade 70(480), All the above grades have class 1 and class 2.
The carbon composition of all the above class 2 is max 0.15%.
The carbon composition of A1008 HSLAS grade 45(310) class 1,
A1008 HSLAS grade 50(340) class 1 is max 0.22%
A1008 HSLAS grade 50(340) class 1 is max 0.23%,
A1008 HSLAS grade 55(380) class 1 is max 0.25%,
A1008 HSLAS grade 60(410)/65(450)/70(480)class 1 is max 0.26%, The yield strength of A1008 HSLAS grade 45(310) class 1 is min 310MPa, tensile strength is min 410 Mpa, Elongation 50mm is min 22%;
The yield strength of A1008 HSLAS grade 45(310) class 2 is min 310MPa, tensile strength is min 380 Mpa, Elongation 50mm is min 22%;
The yield strength of A1008 HSLAS grade 50(340) class 1 is min 340MPa, tensile strength is min 450 Mpa, Elongation 50mm is min 20%;
The yield strength of A1008 HSLAS grade 50(340) class 2 is min 340MPa, tensile strength is min 410 Mpa, Elongation 50mm is min 20%;
The yield strength of A1008 HSLAS grade 55(380) class 1 is min 380MPa, tensile strength is min 480 Mpa, Elongation 50mm is min 18%;
The yield strength of A1008 HSLAS grade 55(380) class 2 is min 380MPa, tensile strength is min 450 Mpa, Elongation 50mm is min 18%;
The yield strength of A1008 HSLAS grade 60(410) class 1 is min 410MPa, tensile strength is min 520 Mpa, Elongation 50mm is min 16%;
The yield strength of A1008 HSLAS grade 60(410) class 2 is min 410MPa, tensile strength is min 480Mpa, Elongation 50mm is min 16%;
The yield strength of A1008 HSLAS grade 65(450) class 1 is min 450MPa, tensile strength is min 550 Mpa, Elongation 50mm is min 15%;
The yield strength of A1008 HSLAS grade 65(450) class 2 is min 450MPa, tensile strength is min 520 Mpa, Elongation 50mm is min 15%;
The yield strength of A1008 HSLAS grade 70(480) class 1 is min 480MPa, tensile strength is min 585 Mpa, Elongation 50mm is min 14%;
The yield strength of A1008 HSLAS grade 70(480) class 2 is min 480MPa, tensile strength is min 550 Mpa, Elongation 50mm is min 14%;