Q355NEZ25 steel plate: Z-direction low-alloy steel plate

Q355NEZ25 steel plate: Z-direction low-alloy steel plate

1. The Q355NEZ25 steel plate belongs to the Z-direction low-alloy steel plate, and the Q355NEZ25 grade analysis
1. The grade of the steel is composed of four parts: the initial letter Q of the Chinese pinyin representing the yield strength "yield", the specified minimum yield strength value, the delivery status code, and the quality grade symbol (B, C, D, E, F). Note 1: When the delivery status is hot-rolled, the delivery status code AR or WAR can be omitted; When the delivery status is normalized or normalized rolled, the delivery status code is indicated by N. Note 2: Q + the specified minimum yield strength value + delivery status code, referred to as "steel grade". Example: Q355ND. Among them: Q ——— the first letter of the word "yield" in Chinese pinyin of the yield strength of steel; 355——— specified minimum upper yield strength value in megapascals (MPa); N ——— delivery condition is normalized or normalized rolled; D ——— quality grade is D. Z25 - When the demander requires the steel plate to have the performance of the thickness direction, the symbol representing the thickness direction (Z) performance level is added after the grade specified above, such as: Q355NEZ25, Q355NEZ35, etc.
2. Chemical composition of Q355NEZ25 steel plate: C: ≥0.18 Si: ≥0.5 Mn: 0.90-1.65 P: 0.025 S: 0.020 Nb: 0.005-0.05V: 0.01-0.12 Ti: 0.006-0.05 Cr: ≥0.30 Ni: ≤ 0.50 Cu: ≤0.40 Mo: ≤0.10N: ≤0.015 Als: ≥0.01