Common Strength - Class A, B, D, CS, and E steel has A minimum yield strength of 235 MPa.
The high strength grade is AH, DH, EH and FH. Each of these grades has three different minimum yield strengths: 315MPa (32), 350MPa (36), and 390MPa (40). That is to say, this type of steel can be subdivided into:
AH32, AH36 AH40, DH32, DH36, DH40, EH32, EH36 of EH40, FH32, FH36, a total of 12 FH40 again a. by the way, A, B, D, CS and AH, DH, EH, and FH, the meaning of these distinctions is mainly according to the low temperature performance of steel to distinguish:
The impact temperature of Class A steel is 20°C, Class B and AH is 0°C, Class D and DH is -20°C, Class E, CS and EH is -40°C, and Class FH is -60°C.
