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ASTM A709 A709 Grade HPS 70W Steel: Specifications & Listings

ASTM A709 A709 Grade HPS 70W: High performance weathering steel for bridge construction with 485 MPa (70 ksi) yield strength. Superior toughness, weldability and corrosion resistance compared to conventional weathering steels.

Forms: Plate Category: Structural Steel (Corten / Weathering)
Grade Details
GradeASTM A709 A709 Grade HPS 70W
Standard ASTM A709
ApplicationsHigh-performance steel (HPS) with enhanced atmospheric corrosion resistance and toughness; primary bridge girders and structural members in bridge construction
Most Active InNorth (Delhi)
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Grade Standard Match
ASTM A959 S41026 ASTM A959:2011 Related Material
EN 10088-1 X5CrNiCuNb16-4 EN 10088-1:2014 Related Material
EN 10088-1 X5CrNiCuNb16-4 EN 10088-1:2023 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn Si P S Cu Cr Ni Mo
<=0.11 1.10-1.35 0.30-0.50 <=0.020 <=0.006 0.25-0.40 0.45-0.70 0.70-1.00 0.02-0.08
Mechanical Properties
Tensile Strength 585 MPa min
Yield Strength 485 MPa min
Elongation 19% min
Hardness 170-210 HB

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ASTM A709 A709 Grade HPS 70W Plate
4.000 MT
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ASTM A709 A709 Grade HPS 70W Plate
3.100 MT
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