Mechanical Properties of Low Alloy High Phosphorus Weathering Steel

  • GADADHAR SAHOO R & D Centre for Iron and Steel, SAIL, Doranda, Ranchi-834002, India
  • BASANT KUMAR JENA Dr B R Ambedkar Institute of Technology, Port Blair, A&N Island, India
  • NANDITA GUPTA National Institute of Foundry & Forge Technology, Hatia, Ranchi-834003,India
  • BALBIR SINGH R & D Centre for Iron and Steel, SAIL, Doranda, Ranchi-834002, India
Keywords: Strengths, Steel, phosphorus, mechanical properties,

Abstract


Mechanical behaviour of two low alloy steels (G11 and G12) was studied with respect to different phosphorus contents. Tensile strength and yield strength increased while % of elongation at failure decreased on increasing phosphorus content. The SEM photomicrograph of low phosphorus steel (G11) revealed ferrite pearlite microstructure. The highest phosphorus content (0.42 wt. % P) sample (G12) exhibited larger ferritic grain. The Charpy V notch (CVN) impact energy of G11 and G12 steel at room temperature was 32 J and 4 J respectively and their fractographs revealed brittle rupture with cleavage facets for both the steels. However, the fractograph of G11 steel after tensile test exhibited ductile mode of fracture with conical equiaxed dimple while that of G12 steel containing 0.42 wt. % P exhibited transgranular cleavage fracture. Based on this study, G11 steel containing 0.25 wt. % P could be explored as a candidate material for weathering application purpose where the room temperature toughness requirement is 20 J and 27 J as per IS 2062.

Author Biographies

GADADHAR SAHOO, R & D Centre for Iron and Steel, SAIL, Doranda, Ranchi-834002, India
PhD, JSPS PDF and Deputy Manager, Physical Metallurgy Group, R & D Centre for Iron and Steel, SAIL
BASANT KUMAR JENA, Dr B R Ambedkar Institute of Technology, Port Blair, A&N Island, India
Head of Department of Mechanical Engineering, Dr B R Ambedkar Institute of Technology, Port Blair, A&N Island, India
NANDITA GUPTA, National Institute of Foundry & Forge Technology, Hatia, Ranchi-834003,India
Associate Professor, National Institute of Foundry & Forge Technology, Hatia, Ranchi-834003,India
BALBIR SINGH, R & D Centre for Iron and Steel, SAIL, Doranda, Ranchi-834002, India
Head of Physical Metallurgy Group, R & D Centre for Iron and Steel, SAIL, Doranda, Ranchi-834002, India
Published
2015/02/24
How to Cite
SAHOO, G., JENA, B. K., GUPTA, N., & SINGH, B. (2015). Mechanical Properties of Low Alloy High Phosphorus Weathering Steel. Journal of Mining and Metallurgy, Section B: Metallurgy, 51(1), 81. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/5364
Issue
Vol. 51 No. 1 (2015)
Section
Original Scientific Paper

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