Brief introduction of A302GrB steel plate

1. A302GrB steel plate is a manganese-molybdenum alloy steel plate for American standard pressure vessels. A302GrB pressure vessels must bear different pressure vessels and strengths because the manufactured containers are generally 314Mpa or higher. The working temperature of A302GrB steel plates is usually between -20°C and 450°C.

2. A302GrB steel plate executive standard: implement ASTM A-302/A302M standard.

3. Delivery status of A302GrB steel plate: hot rolling, controlled rolling, normalizing, tempering, quenching, normalizing + tempering, quenched and tempered steel plate, delivery status can also be specified according to technical requirements.

4. Delivery status of A302GrB steel plate:
a. A302GrB steel plates with a thickness less than or equal to 50mm are usually supplied in the state of rolling, and can also be supplied in the state of normalizing, stress relieving treatment, or normalizing plus stress relieving treatment.
b. A302GrB steel plates with a thickness greater than 50mm should be normalized.
c. When normalizing A302GrB steel plate with a thickness greater than or equal to 100mm, the method of blasting or liquid quenching followed by tempering in the temperature range of 595-705°C can be used to accelerate cooling to achieve mechanical properties similar to normalizing steel plates with smaller thicknesses.
d. If the purchaser agrees, as long as A302GrB steel plate is subsequently tempered in the temperature range of 595-705 °C, it is allowed to use a faster cooling rate than in air to change the toughness of A302GrB steel plate with a thickness of less than 100mm.

5. A302GrB steel plate thickness direction performance requirements: Z15, Z25, Z35.

6. Requirements for flaw detection of A302GrB steel plate: first inspection, second inspection and third inspection.