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NF
Standard Number
A49-243 (Steel Tubes Longitudinally Pressure Welded Tubes D 168.3mm in not Alloyed and Ferritic Alloyed Steels Used at Elevated Temperatures)
Grade TS37C TS42C TS48C TS52C TS15D3 TS15CD2-05 TS15CD4-05 [ All grade ]