Features and practical uses:
Steel grade 321 characteristics-use in the sharpening range (450 ℃ ~ 850 ℃)-Boiler heat exchangers, pipes, expansion joints and other welding, parts/equipment that cannot be heat treated after assembly Chemical composition: (unit: wt% )
Specification C Si Mn P S Cr Ni Others TYPE 321 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 17.00～
9.00 9.00～13.00 Ti: ≥ 5 × C%
Mechanical properties: Specification YS (Mpa) TS (Mpa) EL (%) Hv TYPE 321 ≥205 ≥520 ≥40 ≤200
The hot rolling is now as thin as 0.78mm. the surface of the hot-rolled plate has defects such as iron oxide scale and pitting. The hot rolled sheet has low hardness, easy processing and good ductility. Hot-rolled steel sheets, mechanical properties are far less than cold processing, and secondly forging processing, but have better toughness and ductility.