Lesson 10 - Reliability of Welding Filler Metals

© COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON X MIL-E-22200/7B Covered Electrode, Molybdenum Alloy Electrodes MIL-E-22200/8B Covered Electrode, Low Hydrogen, and Low Hydrogen Iron Powder Alloy Steels and Corrosion Resisting Steels MIL-E-22200/10B Covered, Iron Powder, Low Hydrogen, Medium and High Tensile Steel Electrodes MIL-E-23765/B (SH) Bare Solid Mild Steel Wires MIL-E-24403/A (SH) Flux Cored Electrodes MIL-E-19933E (SH) Bare Solid Chromium and Chromium-Nickel Steels 10.7.0.4 Some military specifications require varying degrees of testing by the manufac- turer before a filler metal is submitted for use. These tests and testing procedures are spelled out in the specification, and when successfully completed, the electrode or wire is placed upon a Qualified Products List (QPL). Other specifications require the manufacturer to submit an affidavit indicating the success of the testing of each specific shipment. 10.8 STATE HIGHWAY ELECTRODE CERTIFICATION Electrodes and filler metals are approved for bridge and highway construction according to the Federal Highway Administration Requirements. Electrodes are tested, and certification is renewed annually to those states that maintain an approved list meeting Federal require- ments. These listings vary annually, and the manufacturer should be consulted for verifica- tion. 10.9 TESTING PROCEDURES Test of welding filler metals per the specifications of the various societies, professional organizations and governing bodies is time-consuming and expensive. However, accurate testing is an important factor in producing quality welding filler metals. Test plates must be welded according to the procedure stated in the specification, which in many instances requires controlled preheat and interpass temperatures. The specimens must be carefully machined from the proper portion of the test plate and held to very close dimensional tolerances so that test results will be accurate. The test equipment must be kept in accu- rate calibration. 10.9.0.1 The following are brief, partial descriptions of the more common types of tests required by various specifications and codes. They are shown here to familiarize you with the methods by which tests are conducted and are not to be construed as complete test procedures.

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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