MIL-E-19933E

Abstract

This specification covers chromium and chromium-nickel alloy bare welding electrodes and out-length rods for use with the inert-gas metal-arc (consumable electrode) and the tungsten-arc welding processes; and bare welding electrode in coils for submerged-arc welding process. <br>Electrodes and rods shall be furnished in the following classes, as specified (see <a>6.1</a>): </span><pre> Class 1 - Spooled electrode (wire form). 1a - Large spool (12-inch flange). 1b - Small spool (4-inch flange). Class 2 - Cut-length rods. Class 3 - Coiled electrode (with or without rim). 3a - 25-pound coil weight. 3b - 50-or 60-pound coil weight. 3c - Over 65-pound coil weight.</pre> <br> <br>Electrodes and rods shall be furnished in the types and sizes shown in <a href="#LDXKDAAAAAAAAAAA-X6">table I</a>, as specified (see <a>6.2</a>). <strong>Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 3112, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</strong> <a name="LDXKDAAAAAAAAAAA-X6" id="LDXKDAAAAAAAAAAA-X6">TABLE I. Electrodes and rods, types and sizes.</a> <pre>Types Diameter sizes (inch) ----------------------------------- Classes 1a Classes 2, 3a, and 1b 3b, and 3c ------------------------------------------------------------ MIL-308 MIL-308Co MIL-308L MIL-308CoL MIL-308HC MIL-309 0.045 MIL-309Co 0.020 1/16 MIL-310 .025 5/64 MIL-312 .030 3/32 MIL-316 .035 &#8539; MIL-316L .045 5/32 MIL-317 1/16 3/16 MIL-318 3/32 &#188; MIL-321 MIL-347 MIL-347Co MIL-349 MIL-410</pre> <br> <br><b><u>Intended Use:</u></b> This type is intended for the general welding of 18 percent chromium, 8 percent nickel, corrosion-resistant (stainless) steels. This type is intended for the general welding of 18 percent chromium, 8 percent nickel extra low carbon corrosion"resistant steel, used where intergranular corrosion should be limited but where corrosive conditions are not the most severe. This type is intended for applications where low magnetic permeability is of prime importance and where corrosion is not a factor. This type is intended for the joining of the 18-8 grades of corrosion-resistant steel to mild steel; special treatment steel, class B armor and other low alloy air-hardening steels, when specified; and carbon and straight chromium steels to austenitic grades. This type is also for deposition of a corrosion-resistant overlay on carbon and low alloy steels. This type is intended for the welding of 25 percent chromium, 20 percent nickel heat-resistant alloy steels used in high temperature service; special treatment steel, class B armor, and other low-alloy air-hardening steels, where specified; and carbon and straight chromium steels to austenitic grades. This type is also intended for deposition of a corrosion-resistant overlay on carbon and low alloy steels. This type is intended for the joining of the "super-alloys" to low-alloy (chromium-molybdenum, and chromium-nickel-molybdenum) steels. This type is intended for the joining of corrosion-resistant alloys of similar designations. The molybdenum content imparts increased resistance to corrosive effect of many organic acids, brine, sulfurous, and sulfuric acid. This type is intended for the welding or type 316L corrosion-resisting steel and under conditions similar to those under which type MIL-318 could be used. This type is intended for welding or alloys or similar composition for increased corrosion-resistance to sulfuric and sulfurous acid and their salts. This type is intended for the welding of type 318 corrosion-resisting steel. Generally, uses are similar to those of type MIL-316 electrode, except that, where elevated temperatures and corrosive conditions favor intergranular corrosion and type 318 alloy is used, choice of stabilized type MIL-318 electrode is indicated. This type of electrode contains titanium for stabilizing the carbon. It is intended for the general welding of 18-8 corrosion-resisting steels stabilized by either titanium or columbium, which used where conditions of welding or service make unstabilized base metals susceptible to carbide precipitation, with consequent intergranular corrosion. Use of this electrode will not prevent intergranular corrosion alongside a weld in unstabilized 18-8 chromium-nickel base metals. This type of electrode is suitable for use with the gas metal are welding process. It is not suitable for use with the submerged arc welding process because only a small portion of the titanium will be recovered in the weld metal. This type of electrode contains columbium plus tantalum for stabilizing the carbon. It is intended for the general welding of 18-8 corrosion-resisting steels stabilized by either titanium or columbium to avoid carbide precipitation with consequent intergranular corrosion. This type of electrode is intended for the joining of the "super-alloys" for applications requiring high strength at elevated temperatures. This 12 percent chromium alloy classification is an air-hardening steel, and, therefore, requires preheat and postheat treatments in order to achieve welds of adequate ductility for most engineering purposes. The most common application of filler metal of this type is for welding alloys of similar composition. It is also used for deposition of overlays on carbon steels to resist corrosion, erosion or abrasion, such as occurs in valve seats and other valve parts. <br>