DEVELOPMENT OF HIGH PERFORMANCE ROCKET MOTOR CASE
Technical progress rept. no. 11, 1-31 May 1961
BUDD CO PHILADELPHIA PA
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The evaluation of materials for rocket motor cases was continued. Data are presented for 25 and 20 Ni steels and JLS 300 alloy. The 20 Ni steel had a better response to heat treatment than the 25 Ni steel. A limited stress corrosion study was made on resistance spot welded JLS 300 to develop comparison data. Two concentrations, 5 and 20, boiling MgCl2 solution were used. Only one specimen showed evidence of cracking. Results of a qualitative evaluation of designs of cylindrical sections based on materials data furnished by suppliers indicated that the base material must have a strength weight ratio in excess of 1 x 10 to the 6th power, and that a cylindrical section with a preferentially oriented helical butt weld offered the best possibility of attaining an over-all chamber strength to density ratio of 1 x 10 to the 6th power or better.
- Solid Propellant Rocket Engines