The steel composition in structural contract is changed form 0.15% carbon, 0.6% manganese, to 0.2% carbon, 1.2% manganese. Might this influence the incidence of:
Porosity
Cracking in the weld area
Under cut for fillet welds
Lack of root fusion defects
Cho em hỏi câu này nếu Mn tăng không vượt quá hoac 1.2% thì có mối liên quan gi đến các…Read More

Background: PQR make the test coupon DN200 12.7 mm, with CVN test -46 deg. C. Material P-No. 1 Gr-No. 1 to P-No. 1 Gr-No. 2. Testing result found acceptance.
Q1: What the range qualification according to Box A-5 Table 323.3.1 of ASME B31.3 2018 (Edition 2020 deleted)?
Q2: What the range qualification according to QW-403.6 in ASME IX 2019?