A656 steel plate is a high strength low alloy steel plate. A656 steel plate complies with American standard ASTM A656. A656 steel plates are divided into three different grades: grade50, grade60, and grade70, each with slightly different strength and mechanical properties. The difference between the three different grades of A656 steel plates, grade50, grade60 and grade70, is that they have slightly different strength and mechanical properties, which depend on different composition control and heat treatment processes.
According to its different grades, the strength and mechanical properties of A656 steel plates are slightly different.
The yield strength of A656 grade50 steel plate is 345MPa, and the tensile strength is 485-620MPa; The yield strength of A656 grade60 steel plate is 415MPa, and the tensile strength is 550-690MPa; The yield strength of A656 grade70 steel plate is 485MPa, and the tensile strength is 610-760MPa. Therefore, A656 grade70 steel plate has the highest strength, A656 grade50 steel plate has the lowest strength, and A656 grade60 steel plate has the strength in between.
In addition, different grades of A656 steel plates may fine-tune the composition control and heat treatment process to achieve different performance requirements. For example, A656 grade60 steel plate usually requires controlled rolling and normalizing to improve its strength and toughness.
In conclusion, the difference between different grades of A656 steel plate mainly lies in the difference in strength and mechanical properties, which depends on the difference in composition control and heat treatment process.
