Low-Alloy High-Strength Steel for Boiler Tubes (LowC-9Cr-2Mo)

[+] Author and Article Information
T. Yukitoshi, K. Nishida

Mechanical Metallurgy Section, Central Research Laboratories, Sumitomo Metal Industries, Ltd., Amagasaki, Japan

T. Oda, T. Daikoku

Material Research Laboratory, Nagasaki Technical Institute, Mitsubishi Heavy Industries, Ltd., Nagasaki, Japan

J. Pressure Vessel Technol 98(2), 173-178 (May 01, 1976) (6 pages) doi:10.1115/1.3454356 History: Received August 11, 1975; Online October 25, 2010


High-strength steel tube HCM9M (LowC-9Cr-2Mo) steel, which shows the intermediate high-temperature strength between austenitic stainless steels and commercial low-alloy steels, has been developed. It has superior weldability, workability and oxidation resistivity. At present HCM9M tubes have been in-service test as reheater and superheater tubing at the 165,000 kW boiler in Japan without trouble. This report deals with the practical properties of HCM9M steel, service test experience and high temperature strengthening mechanism of the steel from morphological viewpoint of carbide.

Copyright © 1976 by ASME
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