Ductilidad del acero inoxidable bajo en níquel para estructuras de hormigón armado

Abstract

Palabras clave: acero bajo en níquel, ductilidad, armaduras, acero equivalente, estructuras de hormigón armado. SUMMARYThis paper discusses the stress-strain curves for a new low nickel stainless steel, a conventional AISI 304 stainless steel and a carbon steel commonly used in reinforced concrete structures. Ductility was studied in terms of ultimate tensile strength (f max ), elastic limit (f y ) and total elongation at maximum force [ultimate strain; uniform elongation] (ε max ). The three materials were assessed with internationally accepted criteria, such as plastic rotational capacity, necking region and the toughness index (total energy absorbed at uniform elongation). The findings were compared to the properties of three types of conventional reinforcing steel: 500SD, 500N and 500H (EC-2).

Stainless steel reinforcement: New material in the latest draft of second‐generation Eurocode 2

“…As a result of the availability of a wide range of grades of stainless steel alloys it is possible to obtain many different properties offering versatility and adaptability. 12,13 The most common grades used for reinforcement bars are explained in this section.…”

“…17 In a hyperquenched state austenitic stainless steels are non-magnetic, although they do increase their magnetic permeability due to a cold-worked deformation. The mechanical characteristics of austenitic stainless steels can be improved by a cold-worked deformation 12,13 : both tensile strength, Rm, and yield strength, Rp 0,2% , increase, whereas elongation as well as reduction of surface fracture area decreases for steel grade EN 1.4301/AISI 304. [18][19][20] If the aforementioned steel grade has its carbon content restricted to maximum 0.030%, steel grade EN 1.4307/AISI 304L is obtained.…”

Estudio comparativo del comportamiento mecánico de armaduras de acero inoxidable y al carbono, en función de su grado de corrosión

“…La corrosión es un fenómeno natural que genera el deterioro de un material y resulta de una reacción química o electroquímica con su entorno. La contaminación del hormigón por cloruros, es la más común y generalmente es causada por compuestos salinos en el aire, sal de deshielo y/o agregados contaminados con cloruro [1], [2].…”