AWS A5.5-A5.5M pdf free download
AWS A5.5-A5.5M pdf free download.Low-Alloy Steel Electrodes for Shielded Metal Arc Welding.
4. Acceptance
Acceptance7 of the welding electrode shall be in accordance with the provisions of AWS A5.0l.
5. Certification
By affixing the AWS specification and classification designations to the packaging, or the classification to the product, the manufacturer certifies that the product meets the requirements of this specification.8
6. RoundingOff Procedure
For the purpose of determining conformance with this specification, an observed or calculated value shall he rounded to the nearest 1000 psi for tensile and yield strength for A5.5, or to the nearest 10 MPa for tensile and yield strength for A5.5M, and to the nearest unit in the last right-hand place of figures used in expressing the limiting values in other quantities in accordance with the rounding-off method given in ASTM E 29.
7. Summary of Tests
The tests required for each classification are specified in Table 5. The purpose of these tests is to determine the chemical composition. mechanical properties and soundness of the weld metal, the usability of the electrode, and the moisture content of the low-hydrogen electrode covering. The base metal for the weld test assemblies, the welding and testing procedures to be employed, and the results required are given in Clauses 9 through 15. The supplemental tests for absorbed moisture (see Clause 16). and for diffusible hydrogen (see Clause 17), are not required for classification of the low-hydrogen electrodes (see Note i of Table 5).
8. Retest
If the results of any test fail to meet the requirement, that test shall he repeated twice. The results of both retests shall meet the requirement. Specimens for retest may be taken from the original test assembly or from a new test assembly. For chemical analysis, retest need be only for those specific elements that failed to meet the test requirernent. 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.
In the event that, during preparation or after completion of any test, it is clearly determined that prescribed or proper procedures were not followed in preparing the weld test assembly or in conducting the test, the test shall be considered invalid, without regard to whether the test was actually completed, or whether test results met, or failed to meet, the requirement. That test shall be repeated, following proper prescribed procedures. In this case, the requirement for doubling the number of test specimens does not apply.
9. Weld Test Assemblies
9.1 One or more of the following four weld test assemblies are required for classification testing. They are:
1. The weld pad in Figure 1 for chemical analysis of the weld metal
2. The groove weld in Figure 2 for mechanical properties and soundness of the weld metal for all classificalions except E(X)XXI8M(l)
3. The fillet weld in Figure 3 for the usability of the electrode
4. The groove weld in Figure 4, an alternate to item 2 above, for mechanical properties and soundness of the weld metal made with the E(X)XX I 8M( I) electrode.
The sample for chemical analysis may be taken from the reduced section of the fractured tension test specimen or from a corresponding location (or any location above it) in the weld metal in the groove weld in Figure 2 or 4, thereby avoiding the need to make the weld pad. In case of dispute. the weld pad shall be the referee method.AWS A5.5-A5.5M pdf download.
