1、MIL-S-LL3LOE 95 m 779970b 04275b5 b = - MIL-S-1131OE 27 February 1976 e- t SUPERSEDING MIL-S-11310D (MU) *, i-* 29 July 1969 MILITARY SPECIFICATION STEEL BARS, CARBON, HOT ROLLED, FOR COLD SHAPING INCLUDING COLD EXTRUSION This specification is approved for use by all Departments and Agencies of the
2、Department f Defense. 1. SCOPE 1.1 Scope. This specification covers hot-rolled carbon steel bars and heat treated carbon steel bars which are to be used in cold shaping, includ- ing cold extrusion, of amunition components. 1.2 Classification. The steel shall be furnished in the compositions listed i
3、n table I, as specified. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. STANDARDS FEDERAL Fed. Std. No. 48 - Tolerances for Steel and Iron Wrought Prod
4、ucts Fed. Test Method Std. No. 151 - Metals, Test Methods MILITARY MIL-STD-163 (Storage) and Overseas Shipment MIL-STD-1459 - Macrograph Standards for Steel Bars, Billets and Blooms for Ammunition Components - Preparation of Steel Products for Domestic Shipment (Copies of specifications, standards,
5、drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) FSC 9510 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
6、-S-LL3LOE 95 9997906 0429566 - 1 - MIL-S-11310E e 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETI FOR
7、 TESTING AND MATERIALS ASTM E 10 ASTM E 30 - Chemical Analysis of Steel, Cast Iron, Open Hearth ASTM E 340 - Standard Method of Macroetching Metals and Alloys - Brinell Hardness Testing of Metallic Materials Iron, and Wrought Iron (Application for copies should be addressed to American Society for T
8、est- ing and Materials, 1916 Race Street, Philadelphia, PA 3 i REQUIRENENTS 19103.) 3.1 Process. The steel shall be manufactured by either the open-hearth, basic oxygen, or the electric furnace process, at the option of the steel producer, unless one of the processes is specified. specified, the ste
9、el shall be fully killed with any appropriate deoxidizing agent. Aluminum, however, shall be used in the killing operation to the extent necessary to control the grain size requirements of 3.4. Unless otherwise 3.2 Condition. Unless otherwise specified, the steel bars shall be furnished as hot-rolle
10、d. or pickled and oiled, in which case the bars shall be free from scale. When approved, descaling may be done by methods other than pickling (see 6.6). c When specified, bars shall be furnished pickled 3.3 Chemical composition. The chemical composition of the bars, shall meet the requirements in ta
11、ble I, subject to the permissible variations shown in table II, provided that in a lot of steel the individual determina- tions for any element shall not vary both above and below the range shown in table I. table 1 may be furnished if approved by the procurement activity. Commercial steels of compo
12、sitions intermediate to those in 3.3.1 A heat analysis of each heat or lot of steel shall be furnished by the steel producer showing the percentages of the elements (except copper, nickel, chromium, and molybdenum) shown in table I. The heat analysis shall meet the chemical requirements of table I.
13、3.3.1.2 High-residual-aluminum steel. When a high-residual-aluminum type of steel is required, it shall be so specified (see 6,6). of aluminum used shall be greater than that necessary for the control of austenitic grain size as required by 3.4. above refers to acid soluble aluminum. The amount The
14、residual aluminum required 3.4 Austenitic grain size. The steel shall have an austenitic grain size of No. 5 or finer. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-LL3LOE 75 W 777770b 04275b7 T - MIL -S -1 13 1 OE 1 Table I. Chemical requi
15、rements for ladle analysis AIS1 Carbon, Manganese, Silicon Phosphorus, Sulfur, No . percent percent max percent max percent max percent 1005 1006 1008 1010 1012 1017 1018 1020 1022 1025 1030 1040 0.06 max 0.08 max 0.10 max O . 08-0 . 13 O e 10-0 o 15 O . 15-0 . 20 O. 15-0.20 0.18-0.23 0.18-0 23 O .
16、22-0.28 O. 28-0.34 O. 37-0.44 0.35 max O. 25-0.40 O. 30-0.60 0.30-0.60 0.30-0.60 0.60-0.90 O. 30-0 60 O . 70-1.00 O 30-0 60 O. 60-0 90 0.60-0.90 O 30-0 50 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 o. 2.0 O . 040 O. 040 O. 040 O. 040 O. 040 O. 040 O. 040 O. 040 O. 040 0.040 O . 040 0.040
17、 O. 050 O. 050 O. 050 O. 050 0.050 O. 050 O . 050 O . 050 O. 050 O. 050 O . 050 O. 050 Unless otherwise specified, incidental elements shall not exceed the following amounts: Copper Nickel Chromium Molybdenum 1020 and lower carbon steels 0.20 0.15 0.07 0.05 1022 and higher carbon steels 0.35 0.25 0.
18、20 0.06 When it is necessary for the silicon content to be other than provided in this table (as in the type of steel covered in paragraph 3.3.1.2) the silicon requirement shall be as approved by the Government agency directing the procurement involved. Table II. Permissible variations for check ana
19、lysis Maximum limit or upper Over the maximum Under the mini- Element limit of range, percent limit, percent mum limit, percent Carbon To 0.25, inclusive 0.02 0.02 Over 0.25 to 0.55, incl. 0.03 0.03 Over O. 55 O. 04 0.04 Manganesa To 0.90, inclusive 0.03 0.03 Over 0.90 to 1.30, incl. 0.06 0.06 Phosp
20、horus 0.040, inclusive 0.01 _- Sulfur To 0,050, inclusive 0.01 - Silicon * To 0.30, inclusive 0.02 0.02 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-1131OE t p 3.5 Heat treatment. Heat treatment, when required, shall be as specified (see 6
21、.6). produce the specified properties throughout the lot. All heat treatment shall be performed in such a manner as to 3.6 Hardness (heat treated bars only). Hardness requirements shall be as specified (see 6.6) 3.7 Decarburization. Decarburization requirements shall apply only to 1025 and higher ca
22、rbon steels, and only when specified. The maximum permissible depth of decarburization shall be as specified (see 6.6). Decarburization shall include both total and partial decarburization. 3.8 Internal soundness. Unless otherwise specified, the quality and cleanliness of the steel, as indicated by
23、the macro-etch test, shall be equal to or better than standard A4, B3, C8 of MIL-STD-1459, with defects D1, D3, D4, D5, D6, D7, and D8 unacceptable. I 3.9 Discard and identification of material - 3.9,1 Discard - The discard from the top and bottom of each ingot shall be sufficient to provide sound s
24、teel. ingots in each heat. These shall be the first and last usable ingots and an ingot approximately at the middle of the pouring of the heat, practice used on marker ingots shall be similar to that used on all other ingots of the heat. equivalent to the original discard on the marker ingots. There
25、 shall be no less than three marker The mold All ingots shall have an original discard at least f 3.9.2 Identification - All materials shall carry the heat number and all top and bottom cuts shall be identified. shall carry the ingot number in addition to the heat number. of the top cut and the bott
26、om end of the bottom cut of all ingots shall be identified. heat has satisfactorily passed the tests prescribed in Section 4. All material from marker ingots The top end All identification shall be retained on the pieces until the 3.10 Dimensions and tolerances. The material shall conform to the nom
27、inal size Specified in invitation for bids and in the contract or order. 3.10.1 Permissible variations for dimensions and permissible deviations from roundness and straightness shall be in accordance with the following requirements. 3.10.1.1 The material shall meet the requirements shown in paragrap
28、h la1 of Fed. Std. No, 48 and table III of this specification for rounds and round-cornered squares, respectively. 3.10.2 Length. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-S-1131OE MIL-S-LL3LOE 75 7777406 OL127567 3 Table III. Permissibl
29、e variations - round-cornered squares; diagonal Specified square size, inches Variation from specified diagonal, inches Over Under - 3 to 3-1/2, inclusive 0.066 O Over 3-1/2 to 3-7/8, inclusive O. 088 O 3.10.2.1 Specific lengths. When specific lengths or lengths expressed as multiples of specific un
30、its are ordered, hot rolled rounds and round-cornered squares shall be furnished to length within the tolerances shown in paragraphs lag, la10, and lall o Fed. Std. No. 48 for rounds and table LV of this speci- fication for round-cornered squares (see 6.3). Table IV. Permissible variations - round-c
31、ornered squares; length, variation from specified length Lengths up to Lengths over 10 Lengths over Nominal square size, 10 ft, incl. to 20 ft, incl. 20 ft, inches inches inches inches Under Over Under 2-1/2 o - O Over Under 3 to 3-7/8, incl. i74 O Over 3-7/8 to 5, incl. 1-1/2 O 2 O 3 O Over 5 to 10
32、, incl. 2 O 3 O 4 O 3.10.2.2 Random lengths. When hot rolled bars are ordered to a random length range which is in accord with standard ranges in paragraph la8 of Fed. Std. No. 48, the length of each bar shall be within the specified range. 3.10.3 Straightness, 3.10.3.1 Hot rolled bars, not heat-tre
33、ated, shall conform to paragraph la12 of Fed. Std. No. 48. 3.10.3.2 Hot rolled bars and heat-treated bars, ordered to “special straightness,“ shall not deviate from a straight line by more than 1/8 inch in any 5 foot length nor by more than 1/8 inch times one-fifth of the number of feet in the entir
34、e length. NOTE: any subsequent heating operation has been performed after straightening. Because of warpage, straightness tolerances do not apply to bars if 3.10.3.3 In order to utilize the maximum capacity of the steel industry, it may be necessary to roll bars on mill equipment that is not capable
35、 of meeting the tolerances shown in 3.10.3.1. When approved (see 6.6), such 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-LL3LOE 75 777770b 0429570 T MIL-S-11310E bars shall not deviate from a straight line by more than the amounts cal- cul
36、ated from the following formula: Maximum deviation in inches - - Tabular value X number of feet in length 5 The tabular value in the formula shall be as shown in table V. Table V. Tabular values for straightness formula , Tabular values For lengths not over For lengths over Specified diameter, inche
37、s 20 feet, inches 20 feet, inches Under 4 314 1-112 4 and over 1 1-112 3.11 Workmanship. 3.11.1 Bars shall be free from pipe, flakes and heat checks and shall not contain any other defect, such as seams and non-metallic inclusions, which due to their nature, degree, or extent detrimentally affect th
38、e suitability of the steel for the intended use. 3.11.2 Bars, for which no particular finish or surface preparation is specified, shall be free from flat spots within commercial tolerances, deep rolling marks, and injurious rolled-in-scale. 3.11.3 Straightening methods applied to the bars shall not
39、produce surface defects to a detrimental degree. 3.11.4 Re-conditioning of bars by grinding for purpose of removing injurious surface defects will be permitted when approved (see 6.6). 3.11.5 Each length of bar furnished shall consist of one continuous Bars joined together by piece cut from the full
40、 length bar as rolled. welding shall not be accepted. 4. QUALITY ASSURANCE PROVISIONS. 4.1 Responsible for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection-requirements as specified herein. in the contract or
41、order, the supplier 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 reserves the right to perform any of the inspections set forth in the specification where such inspectians ar
42、e deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-LL3LOE 95 999970b OY2957L L W MIL-S-11310E 4,2 Lot. Unless otherwise specifie
43、d, lot shall consist of all bars submitted for inspection at the same time, of the same heat, the same condi- tion, the same diameter or thickness, and, when heat-treated, from the same furnace charge of a batch-type heat-treating furnace or subjected to contin- uous treatment under the same conditi
44、ons in a continuous-type furnace, 4.3 Check Analysis - 4.3.1 Chemical analyses may be made by the purchaser representing each heat of steel, requirements of paragraph 3.3. The chemical composition thus determined shall meet the 4.3,2 Samples for check analysis shall be taken at a point midway betwee
45、n the center and the surface of the bloom, billet, or bar by drilling parallel to the longitudinal axis. 16 square inches inclusive, the nominal diameter of the drill shall be 1/2 inch; for material over 16 square inches in cross-sectional area, the nominal diameter of the drill shall be one inch. E
46、ach sample shall consist of not less than two ounces of drillings. For pieces having a cross-sectional area up to 4.3.3 When specified, two samples for check analysis shall be furnished by the steel supplier to the,purchaser. top end of the top bloom, billet, or bar of the first usable ingot and one
47、 sample from the bottom end of the bottom bloom, billet, or bar of the last usable ingot of the heat. paragraph 4.3.2. One sample shall be taken from the The samples shall be taken in accordance with 4.3.4 In case a refereeanalysis is required and agreed upon to resolve a dispute concerning the resu
48、lts of a check analysis, a referee analysis shall be performed in accordance with ASTM Methods E 30, Chemical Analysis of Steel, Cast Iron, Open Hearth Iron and Wrought Iron. 4.4 Austenitic grain size tests. At least one grain size determination shall be made for each heat. 4.4.1 Austenitic grain si
49、ze shall be determined in accordance with an applicable method described in Fed. Test Method Std. No. 151. 4.5 Decarburization test. When decarburization requirements are specified (see para, 3.7), at least one decarburization test shall be made from material of each heat of 1025 or higher carbon steels. microscopic method. The test shall be made by the 4.5.1 Microscopic method. The test shall be made on a representative sect
