AWS A5.29 pdf free download
AWS A5.29 pdf free download.Low-Alloy Steel Electrodes for Flux Cored Arc Welding.
3. Classification
3.1 The flux cored electrodes covered by the A5.29 specification utilize a classification system based upon the U.S. Customary Units and are classified according to the following:
(I) The mechanical properties of the weld metal, as specified in Table 1U,
(2) The positions of welding for which the electrodes are suitable, as shown in Figure 1.
(3) Certain usability characteristics of the electrode (including the presence or absence of a shielding gas) as specified in Table 2 and Figure 1, and
(4) Chemical composition of the weld metal, as specified in Table 7.
3.1M The flux cored electrodes covered by the A5.29M specification utilize a classification system based upon the International System of Units (SI) and are classified according to the following:
(1) The mechanical properties of the weld metal, as specified in Table I M.
(2) The positions of welding for which the electrodes are suitable, as shown in Figure 1,
(3) Certain usability characteristics of the electrode (including the presence or absence of a shielding gas) as specified in Table 2 and Figure 1, and
(4) Chemical composition of the weld metal, as specified in Table 7.
3.2 Electrodes classified under one classification shall not be classified under any other classification in this specification with the exception of the following: Gas shielded electrodes may be classified with 100% CO, (AWS A5.32 Class SG-C) shielding gas (“C” designator) and with a 75 to 80% argon/balance CO2 (AWS A5.32 Class SG-AC-25 or SG-AC-20) shielding gas (“M” designator).
Electrodes may be classified under A5.29 using U.S. Customary Units, and/or under A5.29M using the International System of Units (SI). Electrodes classified under either classification system must meet all requirements for classification under that system. The classification system is shown in Figure 1.
3.3 The electrodes classified tinder this specification are intended for flux cored arc welding either with or without an external shielding gas. Electrodes intended for use without external shielding gas, or with the shielding gases specified in Table 2 are not prohibited from use with any other process or shielding gas for which they are found suitable.
7. Summary of Tests
7.1 The tests required for each classification are specified in Table 3. The purpose of these tests is to determine the mechanical properties, soundness, and chemical composition of the weld metal, and the usability of the electrode. The base metal for the weld test assemblies, the welding and testing procedures to he employed, and the results required are given in Sections 9 through 14.
7.2 The optional supplemental test for diffusible hydrogen in Section 15 is not required for classification, but is included for an optional electrode designation as agreed to between the purchaser and supplier. Another optional supplemental designator (J) may he used to indicate Charpy impact testing at lower than standard temperature (see Figure 1).
8. Retest
If the results of any test fail to meet the requirement, that test shall be repeated twice. The results of both retests shall meet the requirement. Material, specimens or sam- ples for retest may be taken from the original test assembly or from one or two new test assemblies or samples. For chemical analysis, retest need be only for those specific elements that failed to meet the test requirement. If the results of one or both retests fail to meet the requirement, the material under test shall be considered as not meeting the requirements of this specification for that classification.
AWS A5.29 pdf download.
