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ASNSWER: S250GD+AS is a Hot dip Aluminized steel material grade under EN10346 standard, S250GD+AS also should be called Aluminium-Silicon(AS) steel, because it’s surface coating is 92%-89% Al + 8%-11% Si.
S250GD+AS Aluminized steel have three level Surface quality, they are : As coated surface (A), Improved surface (B), Best quality surface(C). Usually the standard surface quality we supplied is Level B.
The material grade of S250GD+AS is 1.0242+AS.
S250GD+AS Aluminium-Silicon(AS) Coating masses are : AS60, AS80, AS100, AS120, AS150 However the Surface treatment are C,O,CO,U,P, PO, S
S250GD+AS steel chemical composition % by mass max
C |
Si |
Mn |
P |
S |
0.20 |
0.60 |
1.70 |
0.10 |
0.045 |
S250GD+AS is the high strength structural Aluminized steel, so it request a good tensile strength.
Yield strength is not less than 250MPa
Tensile strength is not less than 330MPa
Elongation A80 is not less than 19%