1、MIL-S-33040 95 m 797990b O336330 3 m MIL-S -13040 (ORD ) 14 September i953 S PERSEDIIIG RIXS-148 Rev. 5 5 iday 1941 RIXS-222, Rev. 1 16 August 1943 MILITAAY SPECIFICA.TION STZZL BA?S AND TUBBS FOR PISTON XODS AND CYGOMDERS FOZ HYDRO- PNEUXATIC RZCOIL ibUCXATTISidS ,4KD EUXLIBRATORS 1. SCOPZ 1.1 Scop
2、e. This spcification c0vei.s ssecial quality steel bars and rxseamless steel tubes for use in the manufacture of piston rods and cylinders for hydro-pneumatic recoil mechanisms and equilibrators. 1.2 Classification. The steel shall be of the following forms, as specified: Round bars . Round tubes. 2
3、. APILICABLE SPECIFICATIONS, STANDARDS, DMi!SINGS, AND OTIIER 2.1 The following specifications and standards, of the issue PUBLICATIONS . in effect on date of invitation for bids, form a part of this spec- ification: SPECIFICATIONS FEDERAL fi-151 - Metals; General Specification for In- QQ-S-624 - SD
4、sel, Alloy; Bars (General Purpose) Q-s-6 33 - Steel, Carbon; Bars (General Purpose) spection of. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-13040 75 - 7777906 0116331 5 W STAND?idDS 3; IL I TA HY RIIL-STD-10 - 3iL-STD-129 - MIL-STD -163 -
5、Macroetch Test and tacro Tubing, Xechanical, Round: Seamless and Ydelded. S t 8 e 1, !l. 11 oy ; Tubing , kie c han i c al , Hound; Seamless 2nd delded. Surface Roughness, ;Javiness, and Lzy. Xarking of Shipments. ?reparation of Steel Ppoducts for Overseas Shipment or Domestic Ship- ment Involving E
6、xtended StoraLe. (Cosies of specifications and standards required by contrac- tors in cnnection with specific p?ocurement functions should be obtained from the 2rocGring agency or as directed by the contrac- ting officer) . 2.2 Other publications. The following publications, of the issue in effect o
7、n date of invitation for bids, unless otherwise stated, form a part of this specification: Desartment of Cominerce -Publication: Simplified Practice Recommendation 241-52 - Packag- ing, Marking, and Loading Nethods for Steel Products for Domestic Shipments. (Copies of Simplified Practice Recommendat
8、ion 247-52 may be obtained upon application, accompanied by money order, coupon, or cash, to the Superintendent of Documents, Government Printing Of- fice, Washington 25, D. C. Prices may be obtained from the Super- intendent of Documents.) 3 . EQUIREvEN,TS 3.1 Material. The material used shall be s
9、uch as to pro- duce bars and tubes meeting all requirements of this specification. 3.2 Chemical composition. Unless a particular. steel com- position is specified, the steel furnished under this specifi- cation shall be either FS 4140 or FS 8640 conforming to-the chem- ical requirements of specifica
10、tion QQ-S-624 for bars and Speci- fication KIL-S-11487 for tubes. When a particular steel listed in Specification QQ-S-624, Qs-633, MIL-S-11486 or MIL-S-11487 is specified, the bars or tubes shall conform to the chemical re- quirements for the specified steel in the applicable specifi- cat ion. f .
11、2 -, - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-S-130LIO 75 W 777770b OLL6332 7 W 7, r, : MIL-S-13040( ORD ) 3.3 Condit,ion. Unless othprwise s?ecified, th? steel furnished under tais ecificztion shall be h?t-rolled or arawn and he at- t
12、re at e d . - 5.4 %?.t t.rPatment. :.:aterial shall be heat-treated in sizch. a manner as to #?Dduce tke specified prouortics throukhout the -_ entire lot. ieat-treatment shall consist of norrnzlizirrg and ternjxring. quenching is not accepta3le. The hsat-treatment batch number and the statexent “no
13、rmalized and tenisered“ shall be sten- ciled on each piece. The Manufacturer shall determine the detail procedure for the indicated treatmer,t to produce material that will meet the mechanical prouerties specified. 3.5 Fhysical properties. Unless otherwise specified, steel furnished under tnis speci
14、fication shall comply with the physical proserties listed in Table I. Table I. - Physical roserties. Tensile strength iO5,OOO psi, minimum Yield strenkth 30,000 psi, minimum Llongation in 2 inches i8 percent, minimum Fieduction of Area. ZO percent, minimum srinel1 Zardne s s 248 to 300 3.6 Surface f
15、inish. The steel furnished must be capable of developing a 1 to 7 micro-inch 3.X finish, as defined in Standard KIL-sTD-O, and the finished surface must be frse of ali surface i,.i&-:rfections visible to the unaided eye. 3.7 Inclusion content. The permissible amount of con- tamination in the steel s
16、nall be an inclusion content of not more than the limits shown in Table II when examined as described in 4.8. Table II. Inclusion Content Limits Inclusion Inclusion Inclusion Inclusion Type A Type B Type C Type D 3 2 Thin bersies 3 Heavy Series 3 4 3 3 2 3.8 Macro Examination. The quality and cleanl
17、iness of the steel, in accordance with Specification !21-11266, shall be equal to or better than A4-C2-C5, with defects D1, D2, D3, Dh, D5, D6, D7, and D8 unacceptable. 3.9 Dimensional tolerances. Unless otherwise specified, dimensions shall not vary from the ordered dimensions by more than the appl
18、icable tolerances shown in Specifications C,t to be regarded by implication or otherwise as in any manner licensing the holder or my Dther person or corporation or conveyins any riLhts or permission to manufacture, use or sell any satented invention that mzy be in any way related thereto. Custodian: Amy - Ordnance Corps Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
