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Grade A648 Class Ⅲ
Corresponding Standard ASTM A 648-2025
Standard Specification for Steel Wire, Hard-Drawn for Prestressed Concrete Pipe
Classification Carbon Steel
A648 Class Ⅲ Chemical Element Composition Content (%)
Component C Si Mn P S N
Minimum Value 0.5 0.1 0.5 - - -
Maximum Value 0.85 0.35 1.1 0.03 0.035 0.007
A648 Class Ⅲ Mechanical Properties
nominal wire diameter
mm		 Tensile Strength
σb
Mpa
4.88 ≥1740
6.35 ≥1650
7.92 ≥1520

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