Lesson 10 - Reliability of Welding Filler Metals

© COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON X interpass temperature. The top surface of the completed pad is carefully filed by hand in the direction of the weld. Six readings are taken along the top of the weld pad with a prop- erly calibrated magnetic instrument. The six readings are averaged to a single value. This average becomes the ferrite number. 10.9.6 Fillet Weld Test - Some specifications require the fillet weld test be prepared as shown in Figure 8. 10.9.6.1 The weld specimen is made using the specified electrode size and plate thick- ness. After welding, the plate is cut on the lines indicated, and one side of the 1" wide section is polished and etched so that the weld bead is clearly visible. The largest possible right triangle with equal leg lengths is carefully scribed within the fillet weld on this surface, so that the fillet size, leg lengths, and convexity of the weld can be measured and com- pared to the allowable deviations in the specification. 10.9.6.2 The welds in the two longer sections are broken by applying a force in the direc- tion shown in the diagram. The broken surfaces are visually examined for evidence of inclusions, gas pockets, or incomplete root fusion. 10.9.6.3 Fillet weld tests are especially required for all-position electrodes or wires, and the specification will require that the test plates be welded in the vertical-up and overhead positions. FILLET WELD TEST SPECIMEN Figure 8 LEG CONVEXITY LEG

Lesson 1
The Basics of Arc Welding

Lesson 2
Common Electric
Arc Welding Processes

Lesson 3
Covered Electrodes for Welding
Mild Steels

Lesson 4
Covered Electrodes for Welding Low Alloy Steels

Lesson 5
Welding Filler Metals for Stainless Steels

Lesson 6
Carbon & Low Alloy
Steel Filler Metals -
GMAW,GTAW,SAW

Lesson 7
Flux Cored Arc Electrodes Carbon Low Alloy Steels

Lesson 8
Hardsurfacing Electrodes

Lesson 9
Estimating & Comparing Weld Metal Costs

Lesson 10
Reliability of Welding Filler Metals

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