Warpage and creep in stainless steel valve components are decreased by a procedure in which components are machined to a semifinish and then cold soaked in a bath of cryogenic liquid. After the treatment they are returned to ambient temperature and machine finished to the final drawing dimensions

Holden, C. F.

English

NASA Technical Reports Server

October 1967	 -	 Brief 67-10377 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Stabilizing Stainless Steel Components for Cryogenic Service 
.
The problem: 
Stainless steel valve components commonly experi-
ence warpage or creep after being placed in service 
in cryogenic systems. The resultant dimensional 
changes can cause leakage of the cryogenic fluid. 
The solution: 
The valve components are machined to a semifinish 
and then immersed (cold soaked) in a bath of the 
cryogenic liquid in which the components are to 
operate for approximately two hours. After this cold-
soak treatment, the components are returned to am-
bient temperature and machine finished to the final 
drawing dimensions. By this procedure, the residual 
stresses and strains that would otherwise be produced 
in the metal during service are set up before the final 
machining step.
Notes: 
1. This procedure has been used by the Rocketdyne 
Division of North American Aviation, Inc., in the 
fabrication of stainless steel valve components 
for cryogenic systems for several years. 
2. Inquiries concerning this procedure may be di-
rected to: 
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B67-10377 
Patent status: 
No patent action is contemplated by NASA. 
Source: C. F. Holden 
of North American Aviation, Inc. 
under contract to 
Marshall Space Flight Center 
(MFS-13 127) 
Category 05 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
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Stabilizing stainless steel components for cryogenic service

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