1、 Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05M2, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contac
2、t information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 3439 INCH-POUND MIL-DTL-24403/1F(SH) 16 June 2008 SUPERSEDING MIL-DTL-24403/1E(SH) 22 May 2008 DETAIL SPECIFICATION SHEET ELECTRODES W
3、ELDING, FLUX CORED, ORDINARY STRENGTH AND LOW ALLOY STEEL This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the products described here
4、in shall consist of this specification sheet and MIL-E-24403. 1. SCOPE 1.1 Scope. This specification sheet covers ordinary strength and low alloy steel flux cored welding electrodes for use with the flux cored arc welding process with or without shielding gas. 1.2 Classification. Electrodes are of t
5、he types specified in Table I, and of the forms and sizes in accordance with MIL-E-24403. In addition to the sizes specified in MIL-E-24403, the 0.035-inch size may be used for MIL-71T-1, MIL-81T1-Ni1 and MIL-81T1-Ni2 electrodes, and the 0.068- and 0.072-inch sizes may be used for self-shielded elec
6、trodes. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I. Type designation and chemical composition of deposited weld metal. 1/Chemical composition (percent) 2/MIL-type Carbon Manganese Silicon Phosphorus Sulfur Nickel Chromium Molybdenum Vana
7、dium Copper Aluminum 3/MIL-70T-1 4/MIL-71T-1 4/, 5/MIL-70T-5 4/MIL-71T-1A 4/0.12 0.50 to 1.75 0.90 0.030 0.030 0.50 0.20 0.30 0.05 0.20 - MIL-70T-6 6/MIL-70T-8 6/MIL-71T-8 6/0.12 0.70 to 1.80 0.40 0.030 0.030 0.30 0.20 0.30 0.05 0.20 1.10 MIL-71T-8A 6/0.25 0.20 to 1.80 0.60 0.030 0.030 0.30 0.20 0.3
8、0 0.05 0.20 1.10 MIL-71T8-K6 6/0.15 0.50 to 1.50 0.40 0.030 0.030 0.40 to 1.10 0.20 0.30 0.05 0.20 1.10 MIL-71T8-Nil 6/0.12 0.70 to 1.80 0.40 0.030 0.030 0.80 to 1.40 0.20 0.30 0.05 0.20 1.10 MIL-80T1-Nil 4/MIL-81T1-Nil 4/0.12 0.50 to 1.80 0.80 0.030 0.030 0.80 to 1.10 0.15 0.35 0.05 0.20 - MIL-80T1
9、-Ni2 4/MIL-81T1-Ni2 4/0.12 0.50 to 1.80 0.80 0.030 0.030 1.75 to 2.75 - 0.30 0.05 0.20 - 2Footnotes: 1/ Sizes 0.035, 0.045, 0.052, 0.0625, 0.068, 0.072, 5/64, 3/32, 7/64, 0.120, 1/8, and 5/32. 2/Single values are maximum percentages. 3/For self-shielded electrodes only. 4/ These electrodes shall hav
10、e “C” or “M” suffix. Electrodes qualification tested and conformance tested using carbon dioxide shielding gas shall have a “C” suffix, and electrodes tested using 75 percent argon and 25 percent carbon dioxide shielding gas mixture shall have an “M” suffix (for example MIL-70T-1C or MIL-70T-1M). 5/
11、 MIL-71T-1 electrodes having the suffix “HYD”, “HYN” or “HYR” have been specially formulated, require special testing and are intended for use in welding HSLA-65 steel. Electrodes qualification tested and conformance tested using carbon dioxide shielding gas shall have a “HYD” suffix. Electrodes qua
12、lification tested and conformance tested using 75 percent argon and 25 percent carbon dioxide shielding gas mixture shall have an “HYN” suffix, and electrodes qualification tested and conformance tested using 95 percent argon and 5 percent carbon dioxide shielding gas mixture shall have an “HYR” suf
13、fix (for example MIL-71T-1-HYR). 6/These self-shielding electrodes shall have an “S” suffix (for example MIL-71T8-Ni1S). MIL-DTL-24403/1F(SH) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24403/1F(SH) 3 2. APPLICABLE DOCUMENTS 2.1 General.
14、The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness
15、 of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standard
16、s, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS BB-C-101 - Carbon Dioxide (CO2): Technical and U.S.P. DEPARTMENT OF DEFENSE SPECIFICATIONS M
17、IL-A-18455 - Argon, Technical MIL-S-22698 - Steel Plate, Shapes and Bars, Weldable Ordinary Strength and Higher Strength: Structural MIL-E-24403 - Electrodes Welding, Flux Cored, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-2035 - Nondestructive Testing Acceptance Criteria (Copi
18、es of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The followin
19、g other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. NAVSEA TECHNICAL PUBLICATION T9074-AS-GIB-010/271 - Requirements for Nondes
20、tructive Testing Methods (Copies of this document are available from the Naval Logistics Library, 5450 Carlisle Pike, Mechanicsburg, PA 17055 or online at http:/nll.ahf.nmci.navy.mil. Note that prior user registration/approval is required to access the document via the web site. Customer service can
21、 be accessed at 1-877-418-6824.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN WELDING SOCIETY (AWS) AWS A4.3 -
22、Standard Methods for Determination of the Diffusible Hydrogen Content of Martensitic, Bainitic, and Ferritic Steel Weld Metal Produced by Arc Welding (DoD adopted) AWS B4.0 - Standard Methods for Mechanical Testing of Welds (DoD adopted) (Copies of these documents are available from American Welding
23、 Society, 550 N.W. LeJeune Road, Miami, FL 33126 or online at www.aws.org.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24403/1F(SH) 4 ASTM INTERNATIONAL ASTM A131/A131M - Standard Specification for Structural Steel for Ships (DoD adopted
24、) (Copies of this document are available from ASTM International, 100 Barr Harbor Dr., PO Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) NCSL INTERNATIONAL NCSL Z540.1 - Calibration Laboratories and Measuring and Test Equipment-General Requirements (DoD adopted) (Copies of th
25、is document are available from NCSL International, 2995 Wilderness Place, Suite 107, Boulder, CO 80301-5404 or online at http:/www.ncsli.org.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes preced
26、ence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. Electrodes furnished under this specification shall be products that are authorized by the qualifying activity for listing on the appl
27、icable qualified products list before contract award (see 4.2 and 6.3). 3.2 Finish. Copper or other suitable coatings may be used. 3.3 Chemical composition. Chemical composition of the deposited weld metal shall be as specified in Table I. 3.4 Mechanical properties. The mechanical properties of depo
28、sited weld metal shall be as specified in Table II. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE II. Mechanical property requirements. Charpy V-notch (CVN) impact 2/Yield strength at 0.2 percent offset, minimum 1/(lb/in2) Elongation in 2 inc
29、hes, minimum percent 1/MIL-type Ultimate tensile strength minimum lb/in2as-welded 1/As-welded Stress-relieved 3/As-welded Stress-relieved 3/Energy ft-lb minimum average as-welded and stress-relieved 3/Temperature (F)MIL-70T-6 MIL-70T-1 MIL-71T-1 70,000 60,000 55,000 22 22 20 30 0 30 MIL-71T-1-HYR 5/
30、MIL-71T-1-HYN 5/MIL-71T-1-HYD 5/- 60,000 to 90,000 60,000 22 22 30 -20 MIL-71T-1A MIL-70T-5 MIL-70T-8 MIL-71T-8 MIL-71T-8A MIL-71T8-K6 MIL-71T8-Ni1 70,000 60,000 to 75,000 55,000 22 22 20 35 -20 0 MIL-7XT-X-HY 4/MIL-7XT-X-HZ 4/MIL-7XTX-X-HY 4/MIL-7XTX-X-HZ 4/70,000 60,000 to 75,000 55,000 22 22 20 3
31、5 -20 0 MIL-8XTX-X-HY 4/MIL-8XTX-X-HZ 4/80,000 65,000 to 85,000 60,000 22 22 30 40 -20 0 MIL-80T1-Ni1 MIL-81T1-Ni1 MIL-80T1-Ni2 MIL-81T1-Ni2 80,000 65,000 to 85,000 60,000 22 22 20 35 -20 0 5 See footnotes at top of next page. MIL-DTL-24403/1F(SH) Provided by IHSNot for ResaleNo reproduction or netw
32、orking permitted without license from IHS-,-,-MIL-DTL-24403/1F(SH) 6 TABLE II. Mechanical property requirements - Continued. Footnotes: 1/Mechanical properties as determined from all weld metal tension test specimen. 2/For each testing temperature, the average value of five tests shall be greater th
33、an the minimum average value specified. No two specimens shall have values below the minimum average specified. One specimen can have a value of 10 foot-pounds (ft-lb) below the minimum average specified. 3/Stress-relieved procedure shall be in accordance with Note 7 of Figure 1. 4/Electrodes qualif
34、ication tested for conformance to these properties and hydrogen as specified (see 3.6) for the additional use of welding ordinary or higher strength steel to HY-80 or HY-100 steel shall have a suffix of “HY” or “HZ” added to the electrode designation (for example MIL-70T-1-HYC or MIL-81T1-Ni1-HYM; a
35、lso see Table VI). 5/ Electrode requires bracketed cooling rate testing. The high cooling rate test weld assembly shall be prepared in the 1G position. The average heat input considering all weld passes of the high cooling rate test weld assembly shall be 30 minus 5 or plus 2 kJ/in and the preheat/i
36、nterpass temperature shall be 60 to 150 F. The low cooling rate test weld assembly shall be in the 3G position. The average heat input considering all weld passes of the low cooling rate weld assembly shall be 75 plus 5 or minus 2 kJ/in (except for 0.035 diameter flux cored wire, where the average h
37、eat input considering all weld passes shall be 55 plus 5 or minus 2 kJ/in), and the preheat/interpass temperature shall be 275 to 300 F. The root layer may be excluded from all heat input calculations. 3.5 Soundness. Welds shall meet the standards for radiographic inspection in accordance with Class
38、 1 of MIL-STD-2035. 3.6 Hydrogen. Hydrogen levels (milliliters per 100 grams of weld metal) determined in accordance with AWS A4.3 shall not exceed the limits given in Table III. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24403/1F(SH) 7
39、TABLE III. Permissible hydrogen levels in welds made with flux cored electrodes. Electrode (MIL-type) Hydrogen Maximum average value (mL/100 g weld metal) Hydrogen Maximum single value (mL/100 g weld metal) MIL-70T-1, MIL-70T-5, MIL-70T-6, MIL-70T-8, MIL-71T-1, MIL-71T-1A, MIL-71T-8, MIL-71T-8A, MIL
40、-71T8-K6, MIL-71T8-Nil 10.0 12.0 MIL-80T1-Ni1, MIL-80T1-Ni2, MIL-81T1-Ni1, MIL-81T1-Ni2 10.0 12.0 MIL-71T-1-HYR, MIL-71T-1-HYN, MIL-71T-1-HYD 8.0 8.8 MIL-7XT-X-HY, MIL-7XTX-X-HY, MIL-8XTX-X-HY 5.0 5.8 MIL-7XT-X-HZ, MIL-7XTX-X-HZ, MIL-8XTX-X-HZ 2.0 2.3 3.7 Alloy identity. For lots specified in MIL-E-
41、24403, each end of the rod or strip to be spliced during processing shall be sampled at the splicing station for alloy identity (see 4.4), except when splicing is done to repair a break without removing the strip from the process line. The sample shall be tested for alloy identity prior to shipment
42、of the lot. 3.7.1 Coil. Both ends of each coil rolled to the final thickness shall be tested for alloy identity before further processing into electrodes (see 4.4). 3.7.2 Testing of finished electrode and final marking. When specified (see 6.2), each electrode shall be tested for alloy identity in a
43、ccordance with 4.4 after final marking. Identification marking of each spool, coil, or container of electrodes tested after final marking and meeting the acceptance criteria shall include the words “ALLOY TESTED” (see 4.4.2). 3.8 Recycled, recovered, or environmentally preferable materials. Recycled
44、, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.9 Instrumentation. Instrument calibration records s
45、hall be traceable to calibration performed as specified in NCSL Z540.1 or equivalent standard. 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 Qu
46、alification inspection. Qualification inspection shall be performed on electrodes and shall include the examinations and tests identified in Table IV. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24403/1F(SH) 8 TABLE IV. Summary of tests r
47、equired for qualification and conformance inspection. MIL-type Electrode Test Required Test Procedures Requirements Visual and dimensional MIL-E-24403 MIL-E-24403 Alloy identity 4.4 herein 3.7 herein Chemical MIL-E-24403 Table I herein Hydrogen 4.5 herein 3.6 herein Soundness Note 6 to Figure 1 3/3.
48、5 herein All weld metal tension 1/AWS B4.0 3/Table II herein All Impact 2/AWS B4.03/Table II herein Footnotes: 1/ Includes ultimate tensile strength, yield strength, and elongation. For qualification testing, specimens shall be tested in the as-welded and stress-relieved conditions. For conformance
49、inspection, the tensile test shall be conducted for the as-welded condition only. 2/For qualification testing, impact tests shall be conducted for the as-welded and stress-relieved conditions at each temperature specified in Table II. For conformance inspection, impact tests shall be conducted in the as-welded condition only and at the lower temperature specified in Ta
