1、MIL-E- 19 14 1C 16 July 1959 (See 6.8) Type MIL-I-A2a MIL-I-Ac MILITARY SPECIFICATION Class Positions of Sizes welding (diameter) 2 Horizontal and flat 1/8, 5/32 3 Flat 3/16, 1/4 2 Horizontal and flat 1/8, 5/32 3 Flat 3/16, 1/4 ELECTRODES, WELDING, SURFACING, IRON-BASE ALLOY This spec Eication is ap
2、proved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers solid wire covered shielded metal arc welding electrodes for depositing iron-base, abrasion resistant weld-metal overlays . 1.2 Classification. Surfacing electrodes shall be fur
3、nished in the types, classes and sizes shown in table I, as specified (see 6.2.1). TABLE I. Types, classes and sizes. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the issue. listed in t
4、hat issue of the Department of Defense Index of Specifications and Standards (DoDISS) speci- fied in the solicitation form a part of this specification to the extent specified herein. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving
5、this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, 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. FSC 3439 r - I THIS DOCUMENT
6、 CONTAINS -J3 PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E- 19 14 1D SPECIFICATIONS I MILITARY MIL-W-10430 - Welding Rods and Electrodes; Preparation for Delivery of. MIL-S-22698 - Steel Plate and Shapes, Weldable Ordinary Strength and
7、 Higher Strength: Hull Structural. STANDARDS I MILITARY MIL-STD-105 - Sampling Procedures and Tables for.Inspection by Attributes . MIL-STD-147 - Palletized Unit Loads. 2.1.2 Government documents and publications. The following Government document and publication forms a part of this specification t
8、o the extent specified herein. DEPARTMENT OF LABOR Code of Federal Regulations, Title 29, Part 1910 - Occupational Safety and Health Standards. (Application for copies should be addressed to the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.) PUBLICATION NAVAL SE
9、A SYSTEMS COMMAND (NAVSEA) 0900-LP-003-8000 - Surface Inspection Acceptance Standards for Metals . (Copies of specifications, standards and publications required by contrac- tors in connection with specific acquisition functions shouldbe obtained from the contracting activity or as directed by the c
10、ontracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. ASTM E 10 -
11、 Brinell Hardness of Metallic Materials, Test Method for. (DoD adopted) c 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-L714LD 3iIi m 7797706 OzLi5327 L m MIL-E-1 9 14 1D a 4 a a AMERICAN WELDING SOCIETY (AWS) A3.0 - Welding Terms and Defin
12、itions. (DoD adopted) A5.13 - Solid Surfacing Welding Rods and Electrodes. 249.1 - Safety in Welding and Cutting. (DoD adopted) I (Application for copies should be addressed to the American Welding Society, Inc., 550 NW LeJeune Road, P.O. Box 351040, Miami, FL 33135.) NATIONAL ELECTRICAL MANUFACTURE
13、RS ASSOCIATION (NEMA) EW 1 - Electric Arc-Welding Apparatus. (DoD adopted) (Application for copies should be addressed to National-Electrical Manufacturers Association, 2101 L Street, NW, Washington; DC 20037.) UNIFORM CLASSIFICATION COMMITTEE AGENT Uniform Freight Classification Ratings, Rules, and
14、 Regulations. (Application for copies should be addressed to the Uniform Classification Committee, Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Industry association specifications and standards are generally available They are also distributed among t
15、echnical groups for reference from libraries. and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifi- cation shall take precedence. 3. REQUIREMENTS 3.1 Materials. Materials shal
16、l produce welding electrodes conforming to the requirements of this specification. 3.1.1 Recovered materials. Unless otherwise specified herein, all material incorporated in the products covered by this specification shall be fabricated using materials produced from recovered materials to the maximu
17、m extent practica- ble without jeopardizing the intended use. materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt prod
18、ucts is allowed under this specification unless otherwise specificlly specified. The term “recovered materials“ means 3.2 Coverings of electrodes. 3.2.1 Handling. Coverings shall withstand ordinary handling without damage that will affect the operation of the electrode. 3.2.2 Concentricity. The cove
19、rings on all sizes of electrodes shall be concentric to the extent that maximum core-plus-one covering dimension shall not exceed the minimum core-plus-one covering dimension by more than the following percentages of the mean dimension: 3 Provided by IHSNot for ResaleNo reproduction or networking pe
20、rmitted without license from IHS-,-,-UIL-E-LSL4LD 34 W 9999906 0245328 3 W MI L-E- 19 1 4 1D Percentage of mean Electrode size (inch) d imens ion 3/32 and smaller 7 1/8 and larger 5 3.2.3 Dielectric strength. The coverings of MIL-I-A2a electrodes at room temperature and in the dry condition, that is
21、, as removed from freshly opened containers, shall have a dielectric strength sufficient to insulate effectively against a difference potential of 110 volts (V), 60 hertz (Hz), alternating current (a. c.) . The coverings of MIL-I-Mc electrodes are electrically conduc- tive. packages are labeled as s
22、pecified in 5.3.1.1. This electrode type is acceptable under this specification provided the 3.2.4 Flaking and cracking of covering. The sum of the surface area of the core wire exposed by flaking and cracking of the covering shall not exceed that permitted for arc ends specified in 3.2.8.1, when su
23、bjected to the test of 4.4.4. 3.2.5 Slag removal. The slags deposited by the coverings shall be readily removable with hand tools rather than air or power oper.ated tools. 3.2.6 Stability. The stability of the coverings shall be such that elec- trodes, after receipt from the manufacturer, will compl
24、y with this specification after storage in original unopened containers under roof and on dry platforms for the following periods: Type of unit container Time period Class 5 of MIL-W-10430 Up to 6 months Classes 1 and 2 of MIL-W-10430 Up to 1 year 3.2.7 Extent of coverings. 3.2.7.1 Arc ends. The arc
25、 end of each electrode shall be sufficiently bare and the covering tapered a minimum amount to permit striking of the elec- trode. The core wire shall not protrude more than 1/32 inch beyond the cover- ing at the arc end. Chipping of the covering at the arc end may accidentally occur, but when it do
26、es occur, such chipping shall not exceed one-quarter the circumference of the core wire and one-quarter of the circumference of the core wire transverse to the arc end. 3.2.7.2 Grip ends. The grip ends shal.1 be bare within the limits speci- fied on figure 1. 3.2.8 Electrode identification. 3.2.8.1
27、Marking. At least one legible electrode type designation or classification number shall be applied to the electrode covering in such a manner that at least one complete type designation shall come dithin the space 2-1/2 inches, from the grip end of the electrode. 4 Provided by IHSNot for ResaleNo re
28、production or networking permitted without license from IHS-,-,-MIL-E-LSL4LD 34 7777706 0245327 5 Type MI L-E- 1 9 1 4 1D Percent by weight maximum 3.2.8.2 Size and legibility. The imprinted designations shall be com- posed of equal-size block characters, the height of which shall be approximately .
29、 50 to 100 percent of the overall electrode diameter (core wire plus covering) but need not exceed a 5/32 inch height. The imprinted designations shall read from left to right from the grip-end as specified on figure 1. The color of the print shall contrast color of the electrode covering and printe
30、d designations shall be readable under normal lighting conditions. O MIL-I-A2a, MIL-I-Ac 3.2.8.3 Stability. Printed type designations shall remain discernible on electrodes rebaked at temperatures up to 850 degrees Fahrenheit (OF) and on unused portions of partially consumed electrodes or discarded
31、stubs, and shall resist effacement by contact incidental to normal handling, shipping and storing. 0.15 3.2.9 Composition. The chemical composition of the covering is optional with the manufacturer. The water content of the cove.ring shall not exceed the percent-by-weight values specified in table I
32、I. 3.3 Core wires of electrodes. 3.3.1 Tolerance in diameter. The diameter of core wire shall not vary more than 0.003 inch from the nominal diameter. 3.3.2 Nominal length. The nominal length of the electrodes shall be in accordance with table III. TABLE III. Nominal length. I I I Sizes (inch) Nomin
33、al lengths end-gr ip (inches) 118, 5/32 3/16, 1/4 14 14 or 18 3.3.3 Tolerance in length. The actual length of any electrode shall vary not more than 1/8-inch from the nominal length specified in table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
34、,-,-MIL-E-LSL4LD 34 m 7779706 0245330 L m MIL-E- 19 14 1D 3.3.4 Core wire alloy identity. Each end of rod or wire to be spliced during processing shall be tested for alloy identity (see 4.4.9), except when splicing is done to repair a wire break without removing the wire from the process line. alloy
35、 identity (see 4.4.9) prior to cutting into electrode core wire lengths. Both ends of each coil drawn to finish size shall be tested or 3.3.5 Covered electrode alloy identity. When specified (see 6.2.1), the core wire of each covered electrode shall be tested or alloy identity after final marking in
36、 accordance with 4.4.9. 3.4 Soundness. The weld metal surface shall be free of porosity visible to the unaided eye. 3.5 Linear and non-linear indications. Macro-surfaces of specimens prepared in accordance with 4.4.5 shall meet the acceptance standards for linear and non-linear indications for class
37、 2 welds as specified in NAVSEA 0900-LP-003-8000. No.lack of bond is permitted. 3.6 Chemical composition of deposited weld metal. Chemical composition of deposited weld metal shall be as specified in table IV. TABLE IV. Chemical composition (weight-percent!) of deposited weld metal e Element MIL-I-A
38、2a MIL-I-Ac Carbon 0.30 0.80 Manganese .50-1-60 1.25-2.50 Phosphorus .O4 0.04 Sulfur -03 003 Silicon 20-0 65 .90 Chromium 65 1.50-3.00 Molybdenum .70 -_ L/ Single values are maximum percentages, 3.7 Hardness. The hardness of deposited weld metal shall be 200 to 300 Brinell for MIL-I-A2a and 400 to 6
39、00 Brinell for MIL-I-A2c. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specifed herein. fied in the contract or purchase order, the
40、contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government re- serves the right to perform any of the inspections set forth in the specifi- cation where such inspections are dee
41、med necessary to assure supplies and services conform to prescribed requirements. Except as otherwise speci- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-LSL4LD 34 777770b 0245333 3 = - 4.1.1 Inspection system. The contractor shall provide a
42、nd maintain an inspection system acceptable to the Government for supplies and services covered by this specification. in the contract or order (see 6.2.1). The inspection system shall be as specified O 4.2 Quality conformance inspection. 4.2.1 General. Electrodes shall be inspected in accordance wi
43、th 4.2.1.1 through 4.2.1.6 with lot selected in accordance with 4.2.2. 4.2.1.1 Dry batch. A dry batch of covering mixture is the quantity of dry covering ingredients mixed at one time in one mixing vessel. A dry batch may be used singly or may be subsequently sub-divided into quantities to which the
44、 liquid binders may be added to produce a number of wt mixes (see 4.2.1.3). 4.2.1.2 Dry blend. A dry blend is one or more dry batches mixed in a mixing vessel and combined proportionately to produce a uniformity of mixed ingredients equal to that obtained by mixing the same total amount of dry ingre
45、dients at one time in one mixing vessel. 4.2.1.3 Wet mix. A wet mix is the combination of a dry batch (see 4.2.1.1) or dry blend (see 4.2.1.2) and liquid binder ingredients at one time in one mixing vessel. 4.2.1.4 Heat of core wire. A heat of core wire is that material obtained from ingots or bille
46、ts poured from one melt, 4.2.1.5 Controlled core wire chemical composition. Where manufacturing processes are such that core wire is identified by controlled chemical composi- tion for each MIL-type, a lot of electrodes shall-be the quantity produced-from one or more chemically tested mill coils of
47、rod from one or more heats or metal conforming to the approved chemistry control limits for that type electrode. The chemical composition control limits for mill coils and allowable variation from the standard shall be disclosed by the manufacturer to NAVSEA for evalua- tion. The following additiona
48、l conditions shall apply: (a) Each continuously rolled mill-coiled rod furnished by mills prohibiting spliced-coil practice, shall be chemically analyzed before processing. Mill-coiled rod furnished by mills permit- ting spliced-coil practice shall have not more than one splice per coil, and both en
49、ds of every coil received from such mills shall be chemically analyzed before processing. disclosed) shall be made available to the Government represen- tative upon request. Mill coils of rod conforming to established core wire chemistry control for a specific MIL-type electrode shall be appropri- ately identified and segregated to avoid mixups. (b) The allowable variation (disclosed) from the standard (not (c) Provided by IHSNot for ResaleNo re
