psi air .••• Effect of upper cycle temperature on the thermal fatigue life of type 304 stainless steel. Load Control Bending fatigue tests at temperatures up to 800°C for Type 304, 316, 321 and 347 stainless steel. – Room temperature fatigue strength is approximately 22 kg/mm2 or 31.2 ksi. The general thumb rule is that the fatigue strength is 0.4-0.5 times the 50 . fatigue life of type 304 stainless steel. For example, the combination of gross plastic deformation and cryogenic temperatures can cause a normally ductile and tough stainless steel, such as 301, 302, 304, 321, to partially transform to bcc structure, resulting in an impairment of ductility and toughness. – There is some reduction in the fatigue strength at higher temperatures. Lower cycle temperature maintained at 200°C and air at 50 psi • • . In this paper, the effects of the different factors, such as hold time, strain range, and temperature, on the creep–fatigue lives of 304 stainless steel (SS) are summarized from the available data. Type 304 Stainless Steel is a variation of the base 18-8 grade, with a higher ... "as-welded" condition. All samples cooled with . Type 304L is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding.

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