scholarly journals Mechanical Properties of Several Products From a Single Heat of Type 304 Stainless Steel

1975 ◽  
Vol 97 (4) ◽  
pp. 343-349 ◽  
Author(s):  
H. E. McCoy ◽  
R. D. Waddell
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Yield Stress ◽  
Significant Variation ◽  
Cold Work ◽  
Stress Rupture ◽  
304 Stainless Steel ◽  
Single Product ◽  
Type 304 ◽  
Type 304 Stainless Steel

Tensile and stress-rupture tests were run on several products from a 90-ton (8.2 × 104 Kg) heat of type 304 stainless steel. The yield stress of the products in the as-received condition varied from 26,500, to 57,200 psi (183 to 395 MPa) at 75 deg F (24 deg C). There were significant differences between the strengths of various products and considerable variation for a single product due to nonuniform residual cold work. Reannealing 0.5 hr (1.8 × 103 sec) at 2000 deg F (1093 deg C) resulted in yield stresses in the 25,000 to 27,000 psi, (172 to 186 MPa) range; only the properties of the hot-reduced tubing fell below this range. At a test temperature of 1100 deg F (593 deg C), the as-received products had yield stresses from 14,800 to 35,500 psi (102 to 245 MPa). Reannealing caused the yield stresses to fall in the range 9,440 to 11,700 psi (65.1 to 80.7 MPa). Stress-rupture tests at 1100 deg F (593 deg C) on the reannealed products did not reveal significant variation in properties.

scholarly journals Pre-strain effect on the elevated temperature mechanical properties of type 304 stainless steel.

1986 ◽  
Vol 35 (398) ◽  
pp. 1284-1290 ◽  
Author(s):  
Kazuo OGAWA ◽  
Masaaki ISHII ◽  
Hiroyasu YOSHIZAWA ◽  
Satoshi OOTE ◽  
Yuhsaku WADA
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Elevated Temperature ◽  
304 Stainless Steel ◽  
Strain Effect ◽  
Type 304 ◽  
Type 304 Stainless Steel

An assessment of cold work effects on strain-controlled low-cycle fatigue behavior of type 304 stainless steel

1993 ◽  
Vol 24 (4) ◽  
pp. 913-924 ◽  
Author(s):  
K. Bhanu Sankara Rao ◽  
M. Valsan ◽  
R. Sandhya ◽  
S. L. Mannan ◽  
P. Rodriguez
Keyword(s):  
Stainless Steel ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cold Work ◽  
304 Stainless Steel ◽  
Cycle Fatigue ◽  
Type 304 ◽  
Type 304 Stainless Steel

Stress-rupture tests at 1350 degrees F on type 304 stainless steel

1953 ◽  
Author(s):  
William D Jenkins ◽  
William A Willard ◽  
William J Youden
Keyword(s):  
Stainless Steel ◽  
Stress Rupture ◽  
304 Stainless Steel ◽  
Type 304 ◽  
Type 304 Stainless Steel

Stress Corrosion Cracking of Sensitized Type 304 Stainless Steel in High-Temperature Water with Anionic Impurities Contamination

CORROSION ◽  
10.5006/0690 ◽  
2012 ◽  
Vol 68 (12) ◽  
pp. 1094-1107 ◽  
Author(s):  
F. Scenini ◽  
A. Sherry
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Cold Work ◽  
Corrosion Cracking ◽  
304 Stainless Steel ◽  
Localized Deformation ◽  
Type 304 ◽  
Type 304 Stainless Steel

This paper describes some results selected from a larger program that was aimed at understanding the stress corrosion cracking (SCC) initiation of Type 304 stainless steel (UNS S30400) in high-temperature deaerated water. Out of a large number of statically loaded samples, only a small minority of the tested samples underwent SCC. The occurrence of SCC indicates a synergism between sensitization, ionic impurities (mainly chloride and sulfate), and/or superficial defects and cold work. In fact, none of the nonsensitized materials initiated cracking (within the time scale of the tests), while only three sensitized samples underwent extensive SCC. The crack morphology of the fractured sample was predominantly inter-granular with some transgranular regions. Transmission electron microscopic samples containing crack tips were, in most respect, in line with the literature: a magnetite/spinel duplex layer on the crack surfaces, a Cr-rich oxide at the crack tip, and Ni enrichment at the metal/oxide interface and oxidized deformation bands intercepting the crack flanks. Also, finger-like features protruding several hundreds of nanometers along the slip planes intersecting the intergranular crack were found on grain boundaries with a high degree of localized deformation. These results support the theory that cracking initiation and propagation might be associated with the formation of oxide on crystallographic planes inside the material.

Effect of CO2 on the Strength and Ductility of Type 304 Stainless Steel at Elevated Temperatures

CORROSION ◽  
1963 ◽  
Vol 19 (5) ◽  
pp. 157t-164t ◽  
Author(s):  
W. R. MARTIN ◽  
H. E. McCOY
Keyword(s):  
Stainless Steel ◽  
Creep Rate ◽  
Elevated Temperatures ◽  
Equivalent Stress ◽  
Stress Rupture ◽  
304 Stainless Steel ◽  
Tensile Fracture ◽  
Type 304 ◽  
Type 304 Stainless Steel ◽  
Strength And Ductility

Abstract One of the important problems in determining the usefulness of stainless steels as cladding materials in high-temperature gas-cooled reactors is the effect of chemical reactions between clad and coolant on the cladding strength and ductility. The mechanism by which the coolant (CO2 in this investigation) affects the strength properties of Type 304 stainless steel are being investigated in the range 1300 to 1700 F (704–927 C). Creep- and stress-rupture results obtained on sheet materials in wet and dry CO2 and argon are compared. The effect of annealing in CO2 on the tensile strength and ductility is also reported. The question of whether the strengthening observed in CO2 was due to oxidation or carburization was investigated. Experiments on the effect of various partial pressures of oxygen in argon showed that the creep rate was minimum at approximately 10 ppm. The creep rate in CO2 at equivalent stress and temperature was one-third the minimum rate observed in oxygen. Chemical analyses, metallography, and experiments with isotopic carbon showed that carburization occurred in pure flowing CO2 in the temperature range studied. From this evidence it was concluded that the strengthening observed in CO2 was primarily due to carburization. The creep- and tensile-fracture strains were adversely affected by exposure to CO2 with the magnitude of the effect dependent on the time and temperature of exposure.

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