ABSTRACT In making tubes of corrosion resistant and hardly deformed steels and alloys, the pilger rolling method is used for hot rolling of final thick-walled tubes or mother tubes of large diameters (above 300 mm) and small quantities of other size tubes when no other, more efficient tube rolling or extrusion equipment is available. To clarify individual parameters of the production process and make choice of the deformation-and-temperature parameters, mechanical properties of the alloy type 30Cr25Ni32Mo3 Superaustenitic Stainless Steel at various temperatures were studied. The tests have been performed using samples taken from the forged 400 mm diameter billet to determine strength and plastic properties of the billet metal at various temperatures and its macro- and microstructure. The test results will be used in the choice of optimum conditions of preheating of the billets and hot rolling of tubes. On the whole, it should be stated that as-forged alloy 30Cr25Ni32Mo3 features a favorable combination of strength and plastic properties in the hot-working temperature range of 1075-1200?C.
Cite this paper
nullG. Ebrahimi, H. Keshmiri and H. Arabshahi, "Mechanical Characteristics of Superaustenitic Stainless Steel Type 30Cr25Ni32Mo3 at Elevated Temperatures," Materials Sciences and Applications, Vol. 1 No. 6, 2010, pp. 323-328. doi: 10.4236/msa.2010.16047.
 A. Momeni, K. Dehghani, H. Keshmiri and G. R. Ebrahimi, “Hot Deformation Behavior and Microstructural Evolution of a Superaustenitic Stainless Steel,” Journal of Materials Science and Engineering A, Vol. 527, No. 6, 2010, pp. 1605-1611.
 F. J. Humphreys and M. Hatherly, “Recrystallization and Related Annealing Phenomena,” 1st Edition, Pergamon Press, London, 1995.
 A. Belyakov, H. Miura and T. Sakai, “Dynamic Recrystallization in Ultra-Fine Grained 304 Stainless Steel,” Scripta Mater, Vol. 43, No. 1, 2000, pp. 21-26.
 S. I. Kim and Y. C. Yoo, “Dynamic Recrystallization Behavior of AISI 304 Stainless Steel,” Materials Science and Engineering A, Vol. 311, No. 1-2, 2001, pp. 108-113.
 M. C. Mataya, E. R. Nilsson, E. L. Brown and G. Krauss, “Hot Working and Recrystallization of As-Cast 316L,” Metallurgical and Materials Transactions A, Vol. 34, No. 8, 2003, pp. 1683-1703.
 S. H. Cho and Y. C. Yoo, “Metadynamic Recrystallization of Austenitic Stainless Steelmater,” Journal of Materials Science, Vol. 36, No. 17, 2001, pp. 4279-4284.
 A. Najafizadeh, J. J. Jonas, G. R. Stewart and E. I. Poliak, “The Strain Dependence of Post-Dynamic Recrystallization in 304H Stainless Steel,” Metallurgical and Materials Transactions A, Vol. 37, No. 6, 2006, pp. 1899-1906.
 E. Bernstock-Kopaczyńska, I. Bed Narczyk, M. Jab?ońska, G. Niewielski and D. Kuc, “The Influence of Thermo-Mechanical Treatment on the Structure and Plasticity of FeAl Intermetallic Phase-Base Alloy,” Archives of Civil and Mechanical Engineering, Vol. 8, No. 3, 2008, pp. 15-22.
 J. M. Rodriguez-Ibabe, I. Gutiérrez, B. López and A. Iza-Mendia, “Relationship between Microstructure and Texture Development during the Early Stages of Annealing in Warm Rolled Low Carbon Steels,” Materials Science Forum, Vol. 500-501 (Microalloying for New Steel Processes and Applications), 2005, pp. 795-802.
 G. Niewielski, K. Radwanski and D. Kuc, “The Influence of Hot-Working Processing on Plasticity and Structure of Duplex Steel,” Material Science & Engineering, Vol 28, No. 6, 2007, pp. 325-332.
 H. Yada, C. M. Li and H. Yamagata, “Dynamic γ→α Transformation during Hot Deformation in Iron-Nickel-Carbon Alloys,” ISIJ International, Vol. 40, No. 2, 2000, pp. 200-206.
 A. Schmitz, J. Neutjens, J. C. Herman, and V. Leroy, “New Thermomechanical Hot Rolling Schedule for the Processing of High Strength Fine Grained Multiphase Steels,” ISS Technical Paper, A. Schmitz, 1998, pp. 1-14.