1、MIL-S-8157L ME W 7777706 0122873 5 W I MIL-S-81591 I 9 September 1968 MILITARY SPECIFICATION STEEL, INVESTMENT CASTINGS, CARBON AND CORROSION - RESISTING This specification is mandatory for use by all Depart- ments and Agencies of the Department of Defense. J 1. SCOPE 1.1 Scope - This specification
2、prescribes the requirements for carbon steel castings and corrosion-resistant steel castings made by the investment casting process. 1.2 Classification - Castings shall be of the compositions and conditions shown in Tables I and Ia, as specified (see 6.2). TABU3 I COMPOSITIONS AND CONDITIONS Composi
3、tion number r/ Conditions IC-1020 IC-1030 As cast or annealed As cast, annealed or quenched and tempered IC-1050 As cast, annealed or quenched and tempered IC-1040 As cast, annealed or quenched and tempered - 1/ Not necessarily identical to similar wrought designations. TABLE Ia COMPOSITIONS AND CON
4、DITIONS Composition number r/ Conditions IC-302 IC-303 As cast or solution heat-treated As cast or solution heat-treated Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. TABLE Ia (Continued) COMPOSITIONS AND CONDITIONS ! t 2. Composition number - 1/
5、 IC-304 IC-304 L IC-310 IC-316 IC-321 IC-347 IC-322a IC-410 IC-420 IC-431 IC-440 A IC-440 C Conditions As cast or solution heat-treated Solution heat-treated As cast or solution heat-treated As cast or solution heat-treated As cast or solution heat-treated As cast or solution heat-treated Solution h
6、eat-treated or solution Annealed or quenched and tempered Annealed or quenched and tempered Annealed or quenched and tempered Annealed or quenched and tempered Annealed or quenched and tempered heat-treated and aged - 1/ Not necessarily identical to equivalent wrought designations. APPLICABLE DOCUME
7、NTS 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. SPECIFICATIONS . Federal MMM-A-260 PPP-B-585 PPP-B-601 PPP-B-621 PPP-B-636 PPP-B-1055 Adhesive, Water-Resistat (for Sealing
8、Waterproofed Paper) Boxes; Wood, Wirebound Boxes; Wood, Cleated-Plywood Boxes; Wood, Nailed and Lock-Corner Box, Fiberboard Barrier Material, Waterproofed, Flexible 1 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Federal (Continued) PPP-T-76 Mili
9、tary MIL-P-116 MIL-H-6875 MIL-C-7769 STANDARDS Federal Fed. Test Method Std. No. 151 Military MILSTD-105 MIL-STD-129 MILSTD-271 Tape, Pressure-Sensitive Adhesive Paper, Water Resistant (for Carton Sealing) Preservation, Methods of Heat Treatment of Steels (Aircraft Practices, Process for) Cushioning
10、 Material, Uncompressed Bound Fiber for Packing Metals, Test Methods Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Nondestructive Testing Requirements for Metals (Copies of specifications and standards required by suppliers in connection with specific p
11、rocurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications - The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the issues in effect on date of invitation
12、 for bids or request for proposal shall apply. American Society for Testing and Materials ASTM Designation: E 192 Standard Reference Radiographs of Investment Steel Castings For Aerospace Applications 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
13、-MIL-S-BL573 ME M 9777706 0322876 O W “I (Application for copies of ASTM standards should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103. ) United States of America Standards Institute USAS B 46.1 Surface Texture (Application for co
14、pies should be addressed to the United States of America Standards Institute, 10 East 40th Street, New York, New York 10016.) Official Classification Committee Uniform Freight Classification Rules (Application for copies should be addressed to Official Classification Committee, 202 Chicago Union Sta
15、tion, 516 W. Jackson Blvd., Chicago, Illinois 60606.) 3. REQUIRE MENTS 3.1 Process - Castings shall be made by any investment process producing castings complying with this specification. 3.2 Chemical composition - The chemical analyses of castings shall comply with Tables II and IIa, for the compos
16、ition as specified (see 6.2). TABLE II CHEMICAL REQUIREMENTS L/ Composition number Carbon IC-1020 IC-1030 IC-1040 IC-1050 O. 15-0.25 O. 25-0.35 O. 35-0.45 O. 45-0.55 Manganese 1 Silicon I Phosphorus Sulfur (maximum) (maximum) O. 30-0.60 O. 04 O. 04 O. 20-1.00 O. 70-1.00 O. 04 O. 04 O. 20-1.00 O. 70-
17、1.00 O. 04 O. 04 O. 20-1.00 O. 70-1.00 O. 04 O. 04 O. 20-1.00 - 1/ Elements expressed in weight percent. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-S-BL59L NE = 9999906 0322877 2 O O (D O lllfl m cu Id =:II O m rl O m O m O m O m cv O Is m
18、 2 m E- I 0000000 m m moo O0 0000000 oooomoo O O O O00 O O0 Fll-IFIrlrlrlrl rl rl rlrlrl rlrl . . . . . . . . m m m Oqg:%800 mm m O W d2dd d d O O00 mm+ mm O0 O 00000 O O O00 W O0 B2BBBdB B d ddB OB dddd O d d 000000 O00 O O0 O O o00 O O00 O0 WNNo R1 rl rlFIrl rlrl . . rl rld2 dddd orlo m mo E-cu mm
19、w II om WQ, mcuwmmwQ) W Co r(FIOON00 O O r; d I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.1 The contractor shall furnish an analysis of each master heat showing the percentages of the elements designated. A master heat shall be defined as p
20、reviously refined metal of a single furnace charge or a blend thereof. i f 3.3 Condition - Castings shall be furnished in the condition specified in the contract or order (see 6.2). The type of heat treatment, when required, shall be at the option of the contractor unless otherwise specified by the
21、procuring activity. For compositions IC-302, IC-304, IC-310, IC-316, and IC-347, solution heat-treated condition shall consist of heating in the range 1850 to 2150“ F and quenching in water. Other steels in Table I and Table Ia shall be heat treated in accordance with MIGH- 6875. 3.4 Mechanical prop
22、erties - Mechanical properties shall be as shown in Tables III and IIIa. Mechanical properties of castings required for conditions other than shown in Tables III and IIIa shall be as specified in the contract or order (see 6.2). TABLE III MECHANICAL PROPERTIES Composition number IC-1020 IC-1030 IC-1
23、040 IC-1050 “ Condition As cast Annealed As cast Annealed Quenched and tempered As cast Annealed Quenched and tempered As cast Annealed Quenched and tempered Hardness of castings (Rockwell or equivalent) B80 rnax B75 max B85 rnax B75 rnax C20 min B95 max B85 rnax C25 min C20 max B95 max C30 min Mini
24、ml Tensile Strength psi _. 60000 - 65000 85000 - 75000 100000 90000 125000 1 properties of tes Yield Strength (O. 2% offsetj psi - 40000 45000 60000 48000 90000 50000 100000 bars Elongation _. 35. o 25. O 10. o - 25. O 10. o 20. o 5. O 6 Provided by IHSNot for ResaleNo reproduction or networking per
25、mitted without license from IHS-,-,-TABLE! ma MECHANICAL PROPERTIES r 1 Condition Minimum properties of test bar L/ Hardness of castings (Rockwell or equivalent) C36 max. C40 min. C25 max. B94-B100 C30 max. C44 min. C30 max. C38-C49 C28 max. C50 min. C30 max. C58 min. t Reduction of Area percent Yie
26、ld 2/ Strength psi Pensile Strength psi :omposition number Elong. in4xD percent IC-17-4 IC-410 IC-420 IC-431 IC-440A IC-44oc Solution heat-treated Solution heat-treated and aged Annealed Quenched and tempered Annealed Quenched and tempered Annealed Quenched and tempered Annealed Quenched and tempere
27、d Annealed Quenched and tempered 6. O 150,000 - 75,000 - 150,000 180,000 8. O 95,000 - 180,000 2. o 130,000 L70,OOO 2. o 1/ For critical applications, relation of test bar values to properties of castings should be established by actual test. - 2/ Yield strength at 0.2 percent offset. 7 “ - . Provid
28、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-BL591 ME M 9993906 0322880 2 3.4.1 Compositions 302, 303, 304, 304L, 310, 316, 321, 347 - The hardness of castings shall be Rockwell B95 maximum or equivalent in either the as cast or solution heat-trea
29、ted condition. 3.5 Soundness - 3.5.1 Surface - Castings shall be free from cold shuts, fins, laps, or other defects detrimental to fabrication or performance of parts. 3.5.2 Internal - Unless otherwise specified, castings shall conform to ASTM Standard E192. 3.6 Decarburization - Decarburization (pa
30、rtial plus total) shall not exceed a depth of .O03 inch from the as-cast surface on as-cast condition castings. (Exception: IC-1020.) 3.6.1 Carburization - There shall be no evidence of any carburization on the as-cast surfaces of castings prior to heat treatment. (Exceptions: IC-1020, IC-440A and I
31、C-44OC. ) 3.7 Repairing of defects - Castings shall not be welded, plugged, or repaired in any manner without written permission from the procuring activity. Permission to repair defective castings, when granted by the procuring activity, shall not relieve the contractor of his responsibility for me
32、eting all requirements of the drawings or the specification. 3.8 Dimensions and surface roughness - Castings shall conform to the drawings specified in the contract or order (see 6.2) with respect to dimensions and tolerances. Unless otherwise specified, roughness of surfaces shall not exceed 125 rh
33、a (roughness height average . . . microinches), Surface roughness shall be interpreted in accordance with the provisions of USAS B 46.1. 3.9 Identification marking - Castings shall be identified with the melt or inspection lot number, and in addition, when specified on the drawing, shall be marked w
34、ith the drawing or part number by any method which has no deleterious effect on serviceability, 3.10 Workmanship - Castings shall be uniform in quality and condition, hee from foreign materials and other injurious defects. Castings shall be well cleaned. Unless otherwise specified, metallic shot or
35、grit shall not be used for final cleaning, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - The supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise Provided by IHSNot for ResaleNo reproduction or networking permitted
36、without license from IHS-,-,-specified in the contract or 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 inspection
37、s set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Sampling methods - 4.2.1 Lot description - 4.2.1.1 Lot for chemical analysis - For purposes of chemical analysis, a lot shall consist of all castings a
38、s poured from the same master heat submitted for inspection at one time. 4.2.1.2 Lot for soundness, hardness , tensile, surface roughness, workman- ship and dimensional inspections - A lot shall consist of all castings of the same drawing, from the same master heat and in the same condition submitte
39、d for inspection at one time. 4.2.1.3 Castings shall be properly separated by lots when presented for acceptance. 4.2.2 Sampling for quality conformance inspection - 4.2.2.1 Sampling for visual and dimensional examination - Sampling of castings for dimensional, identification marking, and workmanshi
40、p inspection shall be in accordance with the provisions of MILSTD-105, Inspection Level II, and Acceptable Quality Level (AQL) 1.5 percent defective (see 6.2). 4.2.2.2 Sampling for soundness - Sampling of castings for soundness inspection shall be in accordance with the provisions of MILSTD-105, Ins
41、pection Level II, and Acceptable Quality Level (AQL) O. 65 percent defective. 4.2.2.3 Sampling for packaging, packing, and marking - A random sample of shipping containers for the inspection of 4.3.3 shall be selected in accordance with the provisions of MILSTD-105, Inspection Level II, Acceptable Q
42、uality Level (AQL) 4. O percent defective. 4.2.2.4 Sampling for tests - 4.2.2.4.1 For chemical analysis - Three samples shall be taken from each master heat in accordance with either Method 111 or Method 112 of Fed. Test Method Std. No. 151 for chemical analysis. 9 Provided by IHSNot for ResaleNo re
43、production or networking permitted without license from IHS-,-,-4.2.2.4.2 For tension tests - Three test bars shall be poured to represent each lot of castings requiring a tension test. Test bars shall be separately cast from the same master heat and under the same conditions as the lot of castings
44、to be represented. They shall be made in molds of the same material and cooled at approximately the same rate as the molds for the lot of castings to be represented. Each test bar shall have a gage section diameter of O. 250 %, O10 inch and a gage length of not less than 1 inch. The radius of the fi
45、llet shall not be less than 1/4 inch. Each test bar shall be marked for.future identification. Test bars shall be heat . treated in the same furnace load with the castings they rbpresent. 4.2.2.4.3 For surface roughness and hardness - Sampling of castings for surface roughness and hardness shall be
46、in accordance with the provisions of MILSTD-105, Inspection Level II, and Acceptable Quality Level (AQL) 1.5 percent defective. 4.3 Quality conformance inspection - 4.3.1 Visual and dimensional examination - Sample castings selected in accordance with 4.2.2.1 shall be inspected to determine conforma
47、nce to the dimensional requirements of 3.8, the identification marking of 3.9, and the workman- ship requirements of 3.10. 4.3.2 Soundness inspection - Sample castings selected in accordance with 4.2.2.2 shall be subjected to penetrant inspection or magnetic particle inspection and to radiographic i
48、nspection in accordance with MILSTD-271, to determine conformance to the soundness requirements of 3.5. 4.3.3 Preservation, packaging, packing and marking - The inspector shall ascertain that preservation, packaging and packing of castings and marking of containers selected in accordance with 4.2.2.
49、3 is in accordahce with the requirements of this specification and the contract or order, 4.3.4 Place of inspectiog - Unless otherwise specified (see 4.3.5.1 and 6.2), inspection and tests shall be conducted at the place of manufacture, 4.3.5 Tests - The methods of test for chemical composition, tension tests, and hardness tests shall be in accordance with Fe
