ASTM A633 steel plate chemical composition

ASTM A633 steel plate is a normalized high strength low alloy structural steel, which is divided into four grades: A633 GrA, A633 GrC, A633 GrD, A633 GrE. It is suitable for welding, riveting or bolting structural parts, and it is suitable for low temperature environment greater than - 45 degrees, because the notch toughness of steel plate is better than rolled steel plate with similar strength grade.

ASTM A633 steel plate chemical composition (mass fraction)/% melting analysis:
A633 GrA: C≤0.18, Mn: 1.0-1.35, P≤0.035, S≤0.04, Si: 0.15-0.5, V: 0.15-0.4, Nb≤0.05.
A633 GrC: C≤0.20, Mn: 1.15-1.5, P≤0.035, S≤0.04, Si: 0.15-0.5, V: 0.15-0.4, Nb: 0.01-0.05.
A633 GrD: C≤0.20, Mn: 0.7-1.35, P≤0.035, S≤0.04, Si: 0.15-0.5, V: 0.15-0.4, Nb:-.
A633 GrE: C≤0.22, Mn: 1.15-1.5, P≤0.035, S≤0.04, Si: 0.15-0.5, V: 0.15-0.4, Nb: 0.01-0.05.
A633 grade D steel contains no more than 0.35 copper, no more than 0.25 nickel, no more than 0.25 chromium, and no more than 0.08 molybdenum.
A633 grade E steel nitrogen content does not exceed 0.03.
The minimum total aluminum content of E grade A633 steel should be 0.018 or the minimum vanadium-nitrogen ratio should be 4:1.

ASTM A633 steel plate manufacturing method:
ASTM A633 smelting process - A633 steel should meet the fine austenite grain size requirements of the A6/A6M standard.

ASTM A633 steel plate delivery status
The A633 steel plate should be normalized, and the steel plate should be heated to a suitable temperature that can produce austenite structure but not more than 925 degrees. Keep it at this temperature for a period of time so that the entire steel plate can be uniformly heated, and then it is cooled in the air.

The E-grade A633 steel plate with a thickness greater than 75mm should be normalized twice.