Title:
DIAPHRAGM
Document Type and Number:
Japanese Patent JPS6075553
Kind Code:
A
Abstract:
PURPOSE: To obtain a diaphragm having superior accuracy in measurement and stable performance for a long term by using a precipitation-hardening permanentlyelastic alloy prepd. by adding specified percentages of Ni, Cr, Ti, Al and Zr to Fe.
CONSTITUTION: A precipitation-hardening permanently-elastic alloy having a composition consisting of, by weight, 40.0W44.5% Ni, 4.0W6.5% Cr, 0.5W1.9% Ti, 0.1W1.0% Al, 0.2W2.0% Zr and the balance accompanying impurities or further contg. 0.1W5.5% one or more among Mo, Nb, Ta and W is prepd., and a diaphragm is made of the alloy. The resulting diaphragm has superior strength and shows its permanent elasticity up to about 130°C. The pressure-volume change rate is within 1% up to about 110°C.
Inventors:
SATOU MICHIO
MIYAUCHI MASAMI
ISHII AKIRA
MIYAUCHI MASAMI
ISHII AKIRA
Application Number:
JP18273783A
Publication Date:
April 27, 1985
Filing Date:
September 30, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
C22C30/00; C22C38/00; C22C38/50; F16J3/02; (IPC1-7): C22C30/00; C22C38/50; F16J3/02
Attorney, Agent or Firm:
Takehiko Suzue
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