ARMY MIL-S-70703 (2)-1988 STRAND CAST STEEL CARBON AND ALLOY FOR PROJECTILE APPLICATIONS《射弹应用的碳合金钢铸带》.pdf

1、 G3L-.ycl MIL-S-70703 (2) ME m 7777706 0322586 2 M - MIL-S-70703 AMENDMENT 2 *. 18 March 1988 - SUPERSEDING . AMENDMENT 1 7 July 1987 MILI TARY SPECIFICATION STRAND CAST STEEL, CARBON AND ALLOY, FOR PROJECTILE APPLICATIONS This amendment forms a part of Military specification MIL-S-70703 dated 12 Ja

2、nuary 1987, and is approved for use by all Departments and Agencies of the Department of Defense. PAGE 1 *l.l, add the following sentence: -. “In instances where specific- .requirements of existing material than requirements of this specification, the more.restrictive -. requirements shall app1y.I s

3、peci.fications or material.noteson drawings are more restrictive . . .- /- PAGE 5 *- -. ? . *3.2.2.3, delete and substitute: “3.2 . 2. 3 permitted center segregation shall be equal -to macroetch standard C3 of ASTM E381. standard may be substituted for C3. The alternative macroetch steel purchaser a

4、nd the Government procuring.office.- It will be the responsibility of the steel .producer to estab1is.h alternative standards and provide 1X photographs -of same to-the steel purcha-ser and the Government technical agency.“ Center segregation (finished product) . The maximum In instances-wherethe st

5、rand cast section does not result in a circular segregation pattern.an alternative macroetch f standard shall be mutually agreed upon between the stee-lproducer, -. . -. i .- -. ., -. AMSC N/A . 1 of 3 MECA c; DISTRIBUTION STATEMENT- A. unlimited. Approved for public release: distribution is i Licen

6、sed by Information Handling ServicesMIL-S-70703 AMENDMENT 2 . . . . s. *3.4.1,: delete and substitute: .3.4.1. Macroetch samples, sulphur prints and samples. All macroetch samples or sulphur pr.ints an a,dG after 1as.t sentence: “(See 6.4)“ I i. , .i . .- I. . t. . PAGE.O. . ._ e 1- - Section 6 i ad

7、d a new paragraph. as -fol lows: L- ,- “6.4 DI ratios. The munitions manufacturer should review the requirements of paragraph 4.6,6 to determine that the specified D.I. ratios will assure purchase of steel capable of consistently,being heat treated to end item mechanical property requirements. The r

8、eview should take into consideration the hardenability of the grade of steel selected for use, the heat treatment equipment and procedures being used and supplemental chemical and hardenability requirements imposed by the munitions manufacturer on the steel supplier. It is the responsibility of the

9、munitions manufacturer to specify more restrictive D.I. transition material ratios when the munitions manufacturer determines a more restrictive chemical analysis variation for transition material is required.“ 2 of 3 Licensed by Information Handling ServicesMIL-S-70703 (2) NE W 97777Ob 0322588 b MI

10、L-S-70703 AMENDMENT 2 “The margins of this amendment are marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccura

11、cies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment . I Custodian: Army - AR Air force - 99 Review activities Army - MR Air Force - 70 Preparing activity . Army - AR Project : (MECA-O40 1 ) 3 of 3 Licensed by Information Handling Services