AWS D8.8 : 1997

Personnel
Foreword
List of Figures
1 Scope
2 General Provisions
2.1 Application
2.2 Standard Units of Measurement
2.3 Welding Processes
2.4 Definitions
2.5 Limitations
2.6 Welding Symbols
2.7 Safety Precautions
2.8 Types of Weld Joints and Applicable Welds
2.9 Structural Classifications
3 Requirements
3.1 Weld Length
3.2 Weld Location
3.3 Weld Size
3.4 Weld Quality
Annex A - Equations for Determining Carbon Equivalent (CE)
Annex B - Procedure to Detect Base-Metal-Induced Liquid Metal
          Embrittlement in Galvanneal Steel
Document List

Figures
1 Schematic example of discontinuities found in arc
     welds
2 Fillet weld - gap
3 Example of notching at end of weld
4 Fillet welded T-joint
5 Fillet weld
6 Illustration of fillet welds - concavity and
     convexity
7 Effective weld size
8 Partial joint penetration groove weld
9 Flare-bevel-groove weld
10 Flare-V-groove weld
11 Arc spot, plug and slot welds
12 Arc spot and plug welds
13 Schematic diagram of arc spot, plug and spot welds

Defined are practical tolerances needed to achieve satisfactory weld quality when dealing with the production volumes associated with automotive structural parts. Gaps in the weld joints have a significant effect on structural performance and weld quality. Automatic and robotic arc welding require good part fitup in the weld joints for consistent weld quality. Therefore, metal stampings and press formed parts must be made to produce weld joint fits within the allowable gap of this specification.