AWS A5.18-A5.18M:2017 pdf download.Specification for Carbon Steel Electrodes and Rods for Gas Shielded Arc Welding
1. Scope
1.1 This specification prescribes requirements for the clasification of carbon steel electrodes (solid, composite stranded,and composite metal cored) and rods (solid) for gas metal arc (GMAW), gas tungsten arc (GTAW), and plasma arc (PAW) welding. Rod is understood to include both cut lengths and spooled wires for GTAW or PAW.
1.2 This specification makes use of both U.S. Customary Units and the International System of Units (SD). The measure-ments are not exact equivalents; therefore, each system must be used independently of the other without combining in any way when referring to weld metal properties. The specification with the designation A5.18 uses U.S. Customary Units. The specification A5. 18M uses SI Units. The latter are shown within brackets [ ] or in appropriate columns in tables and figures. Standard dimensions based on either system may be used for sizing of electrodes or packaging or both under the A5.18 or A5. 18M specifications.
3. Classification
3.1 Solid Electrodes
3.1.1 The solid electrodes (and rods) covered by the A5.18 specification utilize a classification system based upon U.S. Customary Units and are classified according to the chemical composition of the electrode (or rod) as specified in Table 1 and the as-welded mechanical properties of the weld metal as specified in Table 4. The GMAW weld test assem-bly in Figure 2, using CO2 shielding gas, is required and sufficient to classify products offered as an electrode or an elec-trode and rod. The GTAW weld test assembly in Figure 2 is required for products offered as a rod only. The GTAW weld test assembly may be requested in addition to the GMAW weld test assembly as an option and as agreed upon between the purchaser and supplier.
3.1.1M The solid electrodes (and rods) covered by the A5. 18M specification utilize a classification system based upon the International System of Units (SI) and are classified according to the chemical composition of the electrode (or rod) as specified in Table 1 and the as- welded mechanical properties of the weld metal as specified in Table 4. The GMAW weld test assembly in Figure 2, using CO2 shielding gas, is required and sufficient to classify products offered as an electrode or an electrode and rod. The GTAW weld test assembly in Figure 2 is required for products offered as a rod only. The GTAW weld test assembly may be requested in addition to the GMAW weld test assembly as an option and as agreed upon between the purchaser and supplier.
3.2 Composite Metal Cored and Composite Stranded Electrodes
3.2.1 The composite metal cored electrodes and composite stranded electrodes covered by this specification also uti-lize a classification system based upon U.S. Customary Units and are classified according to the chemical composition and mechanical properties of the weld metal as specified in Tables 2 and 4 respectively, and the shielding gas employed (see Figure 1).AWS A5.18-A5.18M pdf download.