Grade U3
Corresponding Standard AS 1442-2007
Carbon steels and carbon-manganese steels--Hot rolled bars and semi-finish products
Classification Carbon Steel
U3 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value - - - - - - - - -
Maximum Value 0.25 0.4 1.4 0.04 0.04 0.3 0.35 0.35 0.1
U3 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Round, Square, Hexagonal Steel; d≤50 Rolling or Normalizing ≥410 ≥250 ≥22
Round, square, hexagonal steel; 50<d≤170 Rolling or Normalizing ≥410 ≥230 ≥22
Flat Steel; d≤12 Rolling or Normalizing ≥410 ≥260 ≥22
Flat Steel; 12<d≤40 Rolling or Normalizing ≥410 ≥250 ≥22
Flat Steel; 40<d≤60 Rolling or Normalizing ≥410 ≥230 ≥22
Billet; d≤120 Rolling or Normalizing ≥410 ≥230 ≥22
U3 Corresponding Standards(Same grade name, different standards)

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