Technological performance of 00Cr17Ni14Mo2 (316L, UG) steel of urea grade
Introduction
00Cr17Ni14Mo2 (316L, UG) steel is a kind of stainless steel in urea grade. This steel has good pitting corrosion resistance. Its high chromium content makes it have strong resistance to intergranular corrosion and carbide precipitation caused by chloride in stainless steel. This steel also has good tensile and bending properties, which makes it a suitable material for use in complex environments.
Chemical composition
The chemical composition of 00Cr17Ni14Mo2 (316L, UG) steel is as follows:C: 0.03, Si: 0.75, Mn: 2.0, P: 0.045, S: 0.03, Ni: 11.0-14.0, Cr: 16.0-18.0, Mo: 2.00-2.50. It can be seen from the table that the main elements of this steel are Cr, Ni and Mo, which can play a good corrosion resistance effect and make the steel have good overall corrosion resistance.
Mechanical properties
The mechanical properties of 00Cr17Ni14Mo2 (316L, UG) steel are as follows:Yield strengthσ0.2(MPa): 190, Tensile strengthσb (MPa): 510-720, Elongationδ5 (%): 40, reduction of areaσs (%): 40. Its mechanical properties can meet the requirements of most use occasions, providing enough strength and toughness for steel.
Heat treatment
00Cr17Ni14Mo2 (316L, UG) steel is usually used after annealing or normalizing. Its common heat treatment process is as follows. First, preheating to 675-725℃, then normalizing at 890-925℃ and then cooling in air. This process can make the steel get rid of machining stress and fatigue, and make the steel obtain good ductility and low hardness.
Metallographic structure
The metallographic structure of 00Cr17Ni14Mo2 (316L, UG) steel mostly consists of Austenite homogeneous structure and a small amount of ferrite near the grain boundary, and some carbide precipitates. The grain size of this steel is generally between 3-6, which is uniform and dense and has good plasticity and toughness.
Conclusion
00Cr17Ni14Mo2 (316L, UG) steel is a kind of stainless steel. Its excellent corrosion resistance, mechanical properties and heat treatment process make it have a wide range of applications in urea equipment. Its good metallographic structure can ensure the good performance of the steel.