Ambient Temperature Creep of Type 304 Stainless Steel

Author(s):  
M. E. Kassner ◽  
P. Geantil ◽  
R. S. Rosen

This study reports the significant ambient temperature creep plasticity at stresses below the conventional 0.2% plastic strain off-set yield stress. This is partially due to the relatively high strain-rate sensitivity of 304 stainless steel. Cold-working significantly increases the creep resistance. Descriptive equations that predict low-stress creep plasticity, which are somewhat different than traditional creep-equation forms, are presented.

Author(s):  
Kunio Hasegawa ◽  
Katsumasa Miyazaki ◽  
Koichi Saito

When multiple flaws are offset flaws, alignment rules are used to determine whether the flaws should be treated as non-aligned or as coplanar. The alignment rules are provided in fitness-for-service codes, and the rules are based on comparison of flaw dimensions. Quasi-static tensile tests were performed on Type 304 stainless steel flat plate specimens with two dissimilar through-wall offset flaws at ambient temperature. It can be seen that, in the experiments, plastic collapse loads were independent of non-alignment dimensions, when the counterpart flaw lengths are smaller enough compared with the main flaw lengths.


1976 ◽  
Vol 98 (2) ◽  
pp. 106-112 ◽  
Author(s):  
A. Miller

For the deformation model developed in Part I, material constants are calculated from standard test data on type 304 stainless steel. With them, simulations are made of various types of tests, including tensile tests, strain-rate sensitivity, creep tests with stress drops, strain-controlled cycling, and creep-fatigue interaction. The simulations show general agreement with the corresponding experimental data for type 304, but in a few respects, quantitative improvements are required. Implications of the strengths and weaknesses of the new model are discussed.


1976 ◽  
Vol 98 (4) ◽  
pp. 357-360 ◽  
Author(s):  
J. M. Steichen

The influence of thermal exposure at 800, 1000, and 1200°F (427, 538 and 649°C) on the tensile properties of type 304 stainless steel has been experimentally determined. Specimens were exposed in static sodium for durations of 1000, 3500 and 10,000 hr. Tests were performed at room temperature and the respective exposure temperatures at nominal strain rates from 3 × 10−5 to 10 s−1. Exposure at temperatures to 1000°F (538°C) did not greatly alter the elevated temperature strength, ductility, or strain rate sensitivity of the subject material. At 1200°F (649°C) strength properties were unchanged by exposure at this temperature while ductility was increased at the lowest strain rate and slightly reduced at the higher rates. The room temperature strength was unchanged and ductility slightly reduced after exposure for 10,000 hr at each temperature.


Alloy Digest ◽  
2016 ◽  
Vol 65 (2) ◽  

Abstract Outokumpu Type 630 is a martensitic age hardenable alloy of composition 17Cr-4Ni. The alloy has high strength and corrosion resistance similar to that of Type 304 stainless steel. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1238. Producer or source: Outokumpu High Performance Stainless.


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