AWS A5.6 pdf free download

AWS A5.6 pdf free download.Covered Copper and Copper Alloy Arc Welding Electrodes.
1.2 Material classified under one classification shall not be classified under any other classification in this specification.
2. Acceptance
Acceptance of the material shall be in accordance with the provisions of AWS A5.O1, Filler Metal Procurement Guidelines.
3. Certification
The manufacturer certifies by affixing the marking required in 18 that the material, or representative material, has passed the tests required for classification, and that the material meets also all other requirements of this specification.
4. Rounding-Off Procedure
For purposes of determining conformance with this specification, an observed or calculated value shall be rounded to the nearest 1000 psi for tensile and yield strength, and to the “nearest unit” in the last right-hand place of figures used in expressing the limiting value for other quantities in accordance with the rounding-off method given in ASTM E29, Standard Recommended Practice for Indicating Which Places of Figures are to be Considered Sign jflcant in Specified Limiting Values.’
5. Summary of Tests Tests required for each classification are specified in Table 2.
6. Retest If any test fails to meet its requirement, that specific test must be repeated twice. The results of both tests shall meet the requirement. Specimens for retest may be taken from the original test assembly or from one or two new test assemblies. For chemical analysis, retest shall be for the specific element which failed to meet the requirement.
7. Weld Test Assemblies Two test assemblies are required for all except ECuNi classification. This classification requires three test as- semblies as follows:
(1) A weld pad, Fig. 1, for chemical analysis of the undiluted weld metal
(2) A groove weld, Fig. 2, for mechanical properties and soundness of the weld metal
(3) A groove weld, Fig. 3, for usability of ECuNi electrodes
7.1 Weld Pad. Base metal of a convenient size, of the type specified in Table 2, and in the Chemical Analysis Column of Table 2 (including Note b to that Table), shall be used as the base for the weld pad shown in Fig. 1. The surface of the base metal on which the weld metal is deposited shall be clean.The pad shall be made with multiple passes and layers of weld metal deposited in the fat position. The slag shall be removed after each pass. The temperature of the base metal shall be not less than 60°F (16° C) prior to welding, and the interpass temperature shall not exceed 300° F (150° C). The dimensions of the completed pad shall be as shown in Fig.1 for cach sizc of electrode. Testing of this assembly shall be as specificd in 8. 7.2 Groove Weld for Mechanical Properties and Soundness. A test assembly shall be prepared and welded as shown in Fig. 2 using base metal of the appropriate type specfied in Table 2 and the Tension test and Bend test columns of Table 2. Testing of this assembly shall be as specified in 9 and 10. 7.3 Groove Weld for Usability Test. A test assembly shall be prepared for electrodes of the ECuNi classifica- tion and welded as shown in Fig. 3, using base metal of the appropriate type specified in Table 2 including Notes. The welding position shall be as specified in the Usability test column of Table 3 for the different sizes of electrodes of the ECuNi classification. Testing of the assembly shall be as specified in 11.AWS A5.6 pdf download.