aws fundamental terms and definitions
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AWS Fundamental Terms and Definitions. Learning to talk like a welder. Introduction . Fundamental terms and definitions used in the welding field - PowerPoint PPT PresentationTRANSCRIPT
AWS Fundamental Terms and AWS Fundamental Terms and DefinitionsDefinitions
Learning to talk like a welder
Introduction Introduction Fundamental terms and definitions used in the
welding field Communicate effectively with Supervisors,
Engineers, Inspectors, your co-workers and ……your Welding Instructor. Need to know for Printreading for Welders
Demonstrating the knowledge and ability to communicate welding information in a professional manner may enhance your potential for career advancement.
Define - “Welding”Define - “Welding”A joining process that produces coalescence of
materials by heating them to the welding temperature, with or without the application of pressure or by the application of pressure alone, and with or without the use of filler metal
Define - “Welding”Define - “Welding”
Advantages:Advantages:Joins all commercial metalsMost common method for joining 2 or more
metals to make them act as one pieceAllows the production of a monolithic structure
that is strong in all directions Is the lowest cost, permanent joining method.Affords lighter weight through better use of
materialsCan be used anywhereProvides design flexibility
Base MetalBase MetalThe materials to be joined
5 Basic Joints5 Basic JointsButt JointLap JointT JointCorner JointEdge Joint
4 Basic Positions4 Basic PositionsFlatHorizontalVerticalOverhead
PuddlePuddleMolten pool of metal that forms when base metals
reach welding temperatureMoved along the joint causing the base metals to
coalesce forming a weld “bead”
Filler MetalFiller MetalMetal added to the puddle to fill the joint
Stringer BeadStringer BeadA weld bead formed with little or no oscillation of the
source of energy
Weave BeadWeave BeadA weld bead formed with exaggerated oscillation of the
source of energyUsed to form a larger weld pool or bead
PenetrationPenetrationDepth of fusion
ReinforcementReinforcementFiller metal extending above base metal
Types of weldsTypes of weldsFillet Weld
– Joins materials at approximately right angles
– Has a triangular profile or section view– Example – T Joint
Types of weldsTypes of weldsGroove Weld
– Joins materials by filling the space or “groove” between
– Example – Butt Joint
Types of weldsTypes of weldsGroove
Weld– 7 types
Types of weldsTypes of weldsSurfacing Welds
– Used to change the dimensions or physical properties of base metals
Tack Welds– Used to hold base metals in position
Others– Back– Backing– Edge– Plug– Slot– Spot– Seam
Types of weldsTypes of weldsOthers
– Back– Backing– Edge– Plug– Slot– Spot– Seam
““Pass”Pass”May refer to one bead or a layer of beads.
Single-passSingle-passRefers to a joint made with a single weld bead
Multiple passMultiple passRefers to a joint made with more than one weld beadLarger weld on top of smallerSplit Layer – uniform sized beads overlapped
Multiple passMultiple pass
Parts of groove weldsParts of groove welds Root opening – space between base metal Root face or “land” – flat spot used to control penetration Groove or Bevel face – where weld interface occurs Bevel angle – degrees of bevel Groove angle or Included Angle – total of bevel angles
Parts of weldsParts of welds
Parts of fillet weldsParts of fillet welds Legs – used to specify weld size Face – side from which welding is done Root – opposite the face – weakest point Toe – where face intersects the base metal Throat – gives the weld strength
Parts of weldsParts of welds
Welder Qualification “Certification”Welder Qualification “Certification”Part of a Quality Assurance System designed to insure
as much as possible that welds of sufficient quality are being produced
There is no certification that qualifies a welder for all types of work
Specific to process, metal, position, progression, etc“Certified” welder has a document certifying that he or
she produced a weld that met a specific standard or code.
ProcessProcessSelect a code (AWS, ANSI, API, CWB, etc)Write a Welding Procedure Specification (WPS)Qualify the WPSQualify the welder (welder performance qualification
test) Issue documentation
Test PositionsTest Positions