NF A49-645

Steel tubes. Round, square and rectangular steel tubes for ordinary uses, longitudinally pressure welded and cold formed from cold-rolled flat products. Dimensions. Technical delivery conditions.

Norme de tubes ronds, carrés ou rectangulaires soudés longitudinalement par pression, en acier au carbone, acier à dispersoïdes pour des utilisations dans diverses industries telles que : meubles, cycles, automobiles, métallerie, cardans, etc.

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