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ASTM A709 鋼

ASTM A709 steel is a high-strength, low-alloy structural steel that is used in a variety of applications, including bridges, buildings, and highways. This steel is known for its excellent strength, durability, and toughness, making it a popular choice for construction projects around the world.

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ASTM A709 steel is the standard specification for structural steel used in bridge and other structural applications. This specification covers carbon and high-strength low-alloy steel plates and structural shapes designed for use in bridges, with an emphasis on providing better mechanical properties and improved atmospheric corrosion resistance for longer service life.

ASTM A709 steel (commonly used in bridges)

  • Thickness (Crassitudo):
    Common thickness ranges are from 6 mm to 100 mm, but thicker plates can be produced on request.
  • Width (Latitudo):
    Typically available in widths from 1,500 mm to 3,200 mm.
  • Length (Longitudo):
    Lengths vary, generally ranging from 6,000 mm to 12,000 mm or custom cut-to-length according to project needs.

ASTM A709 Grade HPS 70W Steel Sheet/Plate Suppliers.

グレード Yield Strength (ksi) Tensile Strength (ksi) Elongation (%) Corrosion Resistance Notes
A709 Grade 36 36 58-80 20 (in 2″) スタンダード Standard structural steel.
A709 Grade 50 50 65-85 18 (in 2″) Moderate Higher yield strength, general bridge use.
A709 Grade 50W 50 70-90 18 (in 2″) Weathering Improved atmospheric corrosion resistance, similar to Corten steel.
A709 Grade HPS 50W 50 70-90 18 (in 2″) Weathering High-performance steel with weathering properties for bridge applications.
A709 Grade HPS 70W 70 85-110 16 (in 2″) Weathering Higher strength version of Grade 50W, weather-resistant.
A709 Grade HPS 100W 100 110-130 16 (in 2″) Weathering High-performance, high-strength steel with weathering properties.

ASTM A709 steel Chemical Composition (Maximum Values, % by Weight)

Element Grade 36 Grade 50 & 50W HPS 50W HPS 70W HPS 100W
Carbon (C) 0.26 0.23 0.11 0.11 0.11
Manganese (Mn) 1.35 1.35 1.35 1.35 1.65
Phosphorus (P) 0.04 0.04 0.02 0.02 0.02
Sulfur (S) 0.05 0.05 0.01 0.01 0.01
Silicon (Si) 0.40 0.40 0.40 0.40 0.40
Copper (Cu) N/A 0.20 0.25 0.25 0.25
Chromium (Cr) N/A 0.45 0.40 0.40 0.50
Nickel (Ni) N/A 0.25 0.40 0.40 0.50

China ASTM A709 Grade 50 Steel Plate Manufacturers, Suppliers - Factory

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