What is SM490YA steel? SM490YA steel is the material name defined in the JIS G3106 standard, and SM490YA steel is hot rolled steel for welded structures. SM490YA steel is used in the form of plates, sheets and strips for construction and engineering structures. JIS G3106 is a Japanese material standard for welded structural steel plates, plates, construction strips, and hot rolled steel for engineering structures.
Size characteristics of SM490YA steel: The suitable thickness of SM490YA steel as defined in JIS G3106 is 6 mm to 300 mm.
Chemical composition of SM490YA steel: JIS G3106 defines the chemical composition percentage of SM490YA steel as follows:
The maximum carbon (C) percentage is 0.20
The maximum manganese (Mn) percentage is 1.65
The maximum percentage of phosphorus (P) is 0.035
The maximum percentage of sulfur (S) is 0.035
The maximum percentage of silicon (Si) is 0.55
The remainder is the percentage of iron (Fe) and almost no negligible impurities.
Mechanical properties of SM490YA steel:
The tensile strength of SM490YA steel is expressed in Newtons per millimeter and must be at least 490 N / mm 2 (MPa) and the maximum value is 610 N / mm 2 (MPa). The minimum yield strength is 365. The elongation properties of SM490YA steel vary with thickness range. The minimum percentage of elongation is in the range of 15.
A comparison of SM400C with this grade SM490YA steel material will show the difference in chemical composition and mechanical properties between SM490YA and SM400C.
The tensile strength of hot rolled steel of welded structure SM490YA steel is more reliable than that of SM400C steel for welding structure SM490YA steel