1. excessive width 熔寬過剩
2. insufficient width 熔寬不足
3. excessive reinforcement 焊縫增強過量
4. insufficient reinforcement 焊縫增強不足
5. mismatch 錯位
6. incomplete filled groove 坡口未填滿
7. pit 弧坑
8. burn through 焊穿
9. slag inclusion (single-pass weld) 夾渣(單道焊)
10. slag inclusion (multiple-pass weld) 夾渣(多道焊)
11. undercut 咬邊,咬肉
12. overlap 焊瘤
13. porosity (along entire length of weld bead) 氣孔(沿整個焊道)
14. wormhole porosity 蟲狀氣孔
15. centerline crack 焊道中心縱向裂紋
16. underbead crack 焊道下裂紋
17. transverse crack 橫向裂紋
18. crater crack 弧坑裂紋
19. root crack 根部裂紋
20. fish eye 魚眼,白點
21. line inclusion 鏈狀夾雜物
22. excessive spatter 嚴重飛濺
23. incomplete fusion 未熔合
24. incomplete penetration 根部未焊透