The difference between Q235A and Q235B
The difference between Q235A and Q235B
Q235A, Q235B, Q235C, Q235D, Q235E different levels represented by the main impact of the temperature is different.
A refers to more than 40 degrees, B in more than 20 degrees, C0 degrees above, D-20 degrees above, E-40 degrees above, A to E different, refers to their performance in the impact of different temperature.
Q235B class, is not impact; Q235B level, is 20 degrees room temperature impact; Q235C level, 0 degree impact; Q235D level, is -20 degree impact; Q235E, is the impact of -40 degrees. At different impact temperatures, the impact values are also different.
Elemental content: A, B, C, D sulfur content decreased in turn; A and B of the same phosphorus content, C phosphorus content followed, D phosphorus content at least
chemical composition:
Low alloy plate
Q235 points A, B, C, D four (GB / T 700-2006)
Q235A grade containing C ≤ 0.22% Mn ≤ 1.4% Si ≤ 0.35% S ≤ 0.050 P ≤ 0.045
Q235B grade containing C ≤ 0.20% Mn ≤ 1.4% Si ≤ 0.35% S ≤ 0.045 P ≤ 0.045
Q235C grade containing C ≤ 0.17% Mn ≤ 1.4% Si ≤ 0.35% S ≤ 0.040 P ≤ 0.040
Q235D grade containing C ≤ 0.17% Mn ≤ 1.4% Si ≤ 0.35% S ≤ 0.035 P ≤0.035
