Much has been written regarding the use of high yield point steels but the facts remain, that relatively little has been used in the petroleum industry. Code authorities require time to consider and approve the use of new materials using higher allowable design stresses. This approval is necessary if high yield point steels are to be used. Factors favorable as well as unfavorable to the use of these steels are discussed, including some indicative economic considerations. The use of higher stresses requires careful consideration and past experience with these steels should be studied by code authorities to see if the use of these tougher, stronger steels cannot be put to better economic use.
Bien des choses ont été écrites sur les aciers extrêmement ductiles. I1 n'en reste pas moins que relativement peu ont été utilisés dans l'industrie pétrolière. Les autorités de standardisation demandent du temps pour considérer et approuver l'usage de nouveaux matériaux capables de supporter, à l'usage, de plus fortes tensions. Leur accord est nécessaire si l'on veut employer ces aciers d'extrême ductilité. Le présent mémoire indique les facteurs favorables et défavorables à l'emploi de ces aciers et pré- sente quelques considérations d'ordre économique. L'emploi de plus fortes tensions requiert un examen attentif, et les Autorités de Standardisation devraient se baser sur l'expérience déjà acquise avec ces aciers pour déterminer si des aciers plus durs et plus solides ne pourraient être d'un emploi rentable.
With the advent of the nuclear age, and space technology involving the many varieties of missile requirements, greater emphasis has been placed on the need for new and better materials for construction use in this field. The petroleum industry and particularly the petro-chemical industry has kept pace with these advances, by developing new processes, chemicals and fuels to serve the exacting requirements of these new energy demands.
Processing, treating and storage of large quantities of fuels, such as natural and manufactured gas, propane, butane, ethylene, liquid oxygen, nitrogen and various acids require special materials and involve a wide range of temperatures, pressures and corrosive conditions.
As the petroleum industry grew with the demands of this expanding economy after World War II it became evident that new and stronger steels were necessary to keep pace with this growth. Tougher steels were needed, steels to resist abrasion, steels to resist corrosion, steels to resist shock at both high and low temperatures, steels from which larger and stronger equipment could be made but yet have less weight and cost less.
Some steels such as the ordinary mild steels to Specifications ASTM-A-283-A-285 and the slightly higher
