321 stainless steel fatigue

321 Stainless Ultimate Headers

Ultimate Headers looked to the qualities of Stainless Steel as a material for several reasons. It is very durable and has excellent strength characteristics at elevated temperatures. By adding titanium to the basic nickel/chromium steel alloy, 321 grade Stainless Steel proved to have increased the resistance to material fatigue and thermal cracking required for high heat environments.

321 Stainless Steel -- Is it a Good Choice for Brazing?

Sep 10, 2015 · Stainless steels are essentially iron-based alloys with at least 10.5% (or more) chromium added to it. There are many different types of stainless steels available to designers to consider, and austenitic stainless steels, which contain nickel as well as chromium, have been quite popular over the years for use in a wide range of brazement-designs due to their inherent corrosion resistance Creep fatigue behaviour of Type 321 stainless steel at 650 In order to provide materials property models and to validate creep fatigue damage predictions, the available uniaxial creep, fatigue and creep fatigue data for Type 321 have been collated and analysed. The analyses of these data have provided evolutionary models for the cyclic stress strain and the stress relaxation behaviour of Type 321 at 650°C.


steels. This paper reviews the existing fatigue N data for austenitic stainless steels in LWR coolant environments. The effects of key material, loading, and environmental parameters, such as steel type, strain amplitude, strain rate, temperature, dissolved oxygen level in water, and flow rate, on the fatigue lives of these steels are Grade 321 Stainless Steel Technical Data - ASKznCS 321 is a titanium-stabilised version of CS 304, used in particular applications within the sensitizing temperature range. Its resistance to sensitization, coupled with its higher strength at high temperature makes it suitable in application where CS 304 will become sensitized, or


Stainless steels are generally selected, first, on the basis of their resistance to corrosion and, second, on the basis of their mechanical properties. As the temperatures of operating environments increase, however, elevated-temperature properties quickly become the primary concern. The family of stainless steels is Mode III Fatigue Crack Growth Following the Curvature of Abstract. Several AISI type 321 stainless steel welded oil tank assemblies used on helicopter engine systems began to leak in service. One failure, a fracture o

Post-weld Fatigue Improvement Technologies for

The fatigue test specimens were fabricated from three types of stainless steel plate:10mm thick type 1.4301 (304L) austenitic stainless steel, 10mm thick type 1.4462 (S31803) duplex stainless steel and 3mm thick type 1.4376 (Cr-Mn) austenitic stainless steel. STAINLESS STEEL FORGINGS - Nickel InstituteType 321 Type 440B Type 440A resistance, fatigue resistance, ductility, creep-rupture life, and other mechanical properties of stainless steels. Stainless steel Types 304 or 316 provide strength and resistance to corrosion. Courtesy Bonney Forge Division

Stainless Steel 347 - Alloy Composition

Stainless Steel 347 - Alloy Composition. Stainless Steel 347 has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments. Alloy 347 is a columbium (niobium)/tantalum stabilized austenitic chromium-nickel stainless steel which was developed to provide an 18-8 type alloy with improved intergranular Stainless Steel Grades (The Ultimate Guide) MachineMfgThe abrasion resistance and fatigue strength are superior to 304 stainless steel. 302 stainless steel. The corrosion resistance is the same as that of 304 stainless steel, however, it has higher strength because of its high carbon content. 303 stainless steel. 321 stainless steel.


The Types 321, 347 and 348 alloys are particularly useful under conditions which cause polythionic acid stress corrosion of non-stabilized austenitic stainless steels, such as Type 304. Exposure of non-stabilized austenitic stainless steel to temperatures in the sensi-tizing range will cause the precipitation of chromium carbides at grain The Global Leader in Specialty Metals 321 Stainless Steel321 stainless is readily welded by all common methods including submerged arc. Appropriate weld fillers are AWS ER347 bare wire and E347 covered electrodes. 321 stainless is similar in machinability to 304 stainless steel. It has a machinability rating of 45% relative to AISI B1112.

The effect of prior fatigue on the creep behaviour of type

Oct 01, 1982 · Austenitic stainless steels are extensively used because of their heat resistant properties as structural materials for high temperature applications. In the course of service, these steels are liable to sustain creep and fatigue damage. The present investigation was undertaken to examine the influence of prior fatigue on the subsequent creep behaviour of type 321 stainless steel, which is used in service Encl. 5-EPRI Presentation - Fatigue Limit of Stainless 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. There is some reduction in the fatigue strength at higher temperatures. The general thumb rule is that the fatigue strength is 0.4-0.5 times the