API5L X52 PSL2 LSAW steel pipeline is applied to general structure,mechanical structure,water wall panel,economizer,supper heater,boiler and heat exchanger with seamless steel tubes,and to transport liquid,gas,oil etc.
55# hot rolled and forged round bars are fine carbon structural steel under the standard of GB/T 699-1999 After treating,55# hot rolled and forged round bars, with high surface hardness and strength, but low plasticity and toughness.
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