STRAIN AGING BEHAVIOR OF MICROALLOYED STEELS ; THE FRACTURE TOUGHNESS BEHAVIOR OF ASTM A737 GRADE B AND GRADE C MICROALLOYED PRESSURE VESSEL STEELS ; THE FRACTURE BEHAVIOR OF ASTM A737 GRADE B AND GRA (To Purchase Call 1-800-854-7179 USA/Canada or 303-397
The strain aging behavior of five microalloyed steels was studied using a variety of straining@ aging and stress relieving cycles. The materials studied were pressure vessel steels ASTM A737 Grade B and A737 Grade C@ and structural steels ASTM A588 Grade A@ A588 Grade B and ASTM A572 Grade 50@ Type 2. The A737 Grade B and Grade C steels were tested in the normalized condition while the A588 Grades A and B and the A572 Grade 50 Type 2 steel were tested in both the as-rolled and normalized condition. The steels were cold strained in tension 2@5 or 10% and were aged at 260 or 370C (500 or 700F) for 10 hr. Strained and aged specimens were stress relieved for 2 and 10 hr at 620C (1150F). Transverse mechanical properties were measured for the as treated@ strained@ aged and stress relieved steels.