Best Practices

Different Welding Defects according to ISO 6520

402	Lack of Penetration
403	Spiking
502	Excess Weld Metal
503	Excessive Convexity
504	Excess Penetration
505	Incorrect weld toe
508	Angular Misalignment
510	Burn Through
511	Incompletely filled Groove
512	Excessive asymetry of fillet weld
515	Root concavity
608	Misalignment
617	Incorrect Root Gap for Fillet Welds
618	Swelling
1011	Longitudinal Crack in the Weld Metal
1012	Longitudinal Crack at the Weld Junction
1013	Longitudinal Crack in the Heat Affected Zone
1014	Longitudinal Crack in the Parent Metal
1021	Transverse Crack in the Weld Metal
1023	Transverse Crack in the Heat Affected Zone
1024	Transverse Crack in the Parent Metal
1031	Radiating Cracks in the Weld Metal
1033	Radiating Cracks in the Heat Affected Zone
1034	Radiating Cracks in the Parent Metal
1045	Crater Crack Longitudinal
1046	Crater Crack Transverse
1047	Crater Crack Radiating
1051	Group of Disconnected Cracks in the Weld Metal
1053	Group of Disconnected Cracks in the Heat Affected Zone
1054	Group of Disconnected Cracks in the Parent Metal
1061	Branching Cracks in the Weld Metal
1063	Branching Cracks in the Heat Affected Zone
1064	Branching Cracks in the Parent Metal
2011	Gas Pore
2012	Uniformly Distributed Porosity Porosity
2013	Clustered (Localized) Porosity Porosity
2014	Linear Porosity
2015	Elongated Cavity
2016	Worm-Hole
2017	Surface Pore

2021	Interdendritic shrinkage
2024	Crater Pipe
2025	End Crater Pipe
3011	Linear Slag Inclusion
3012	Isolated Slag Inclusion
3014	Clustered Slag Inclusion
3021	Linear Flux Inclusion
3022	Isolated Flux Inclision
3024	Clustered Flux Inclusion
3031	Linear Oxide Inclusion
3032	Isolated Oxide Inclision
3033	Clustered Oxide Inclusion
3034	Puckering
3041	Metallic Inclusion, Tungsten
3042	Metallic Inclusion, Copper
3043	Metallic Inclusion, Other Metal
4011	Lack of Side Wall Fusion
4012	Lack of Inter-Run Fusion
4013	Lack of Root Fusion
4021	Incomplete Root Penetration
5011	Continuous Undercut
5012	Intermittent Undercut
5013	Shrinkage Groove
5014	Inter Run Undercut
5015	Local Intermittent Undercut
5043	Melt Through
5061	Toe Overlap
5062	Root Overlap
5071	Linear Misalignment between Plates
5072	Linear Misalignment between Tubes
5091	Sagging in the Horizontal Position
5092	Sagging in the Flat or Overhead Position
5093	Sagging in a Fillet Weld
5094	Sagging at the edge of the Weld
5171	Poor Restart in the Cupping Run
5172	Poor Restart in the Root Run
5211	Excessive Weld Thickness
5212	Excess Weld Width
5213	Insufficient Throat Thickness
5214	Excessive Throat Thickness