A710 Grade A is split in AWS D1.1:2025 Table 5.11: Class 2 over 2 in is Category B, while Class 2 up to 2 in and Class 3 over 2 in are Category C. This page uses the conservative Category C default unless the project/WPS identifies the Class 2 over-2 in case.
High-Strength and TMCP Steels に SMAW-LH を使う場合、消耗材を乾燥状態に保ち、条件を安定させ、溶接前に表面を清浄にします。
実務管理
SMAW-LH の管理
High-Strength and TMCP Steels に SMAW-LH を使う場合、消耗材を乾燥状態に保ち、条件を安定させ、溶接前に表面を清浄にします。
代表参考値です。必ず承認済み WPS と消耗材メーカーのデータを使用してください。
プロセス選定
SMAW (low-hydrogen) を使う理由
SMAW (low-hydrogen) は、WPS が指定カテゴリと必要消耗材を維持する場合に A710 Gr.A の over 2-1/2" 条件で使用できます。
母材
A710 Gr.A
A710 Gr.A は、最小予熱を決めるため Table 5.11 のカテゴリ C で評価されます。
A710 Grade A qualifier
A710 Grade A Table 5.11 split
A710 Grade A is split in AWS D1.1:2025 Table 5.11: Class 2 over 2 in is Category B, while Class 2 up to 2 in and Class 3 over 2 in are Category C. This page uses the conservative Category C default unless the project/WPS identifies the Class 2 over-2 in case.
What A710 Grade A class and thickness caveat applies?
AWS D1.1:2025 Table 5.11 does not assign one normal low-hydrogen category to every A710 Grade A case. Class 2 over 2 in is Category B; Class 2 up to 2 in and Class 3 over 2 in are Category C. Treat this page as the conservative Category C default unless the project/WPS identifies the Class 2 over-2 in case.