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NF
Standard Number
A49-501 (Steel Tubes Seamless or Welded Hot Finished Structural Hollow Sections)
Grade TUTSE235-2 TUTSE235-3 TUTSE235-4 TUTSE275-2 TUTSE275-3 TUTSE175-4 TSE295-2 TSE295-3 TSE295-4 TUTSE355-2 TUTSE355-3 TUTSE355-4 TUTSE450-2 TUTSE450-3 TUTSE450-4 [ All grade ]