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ASTM A588 A588 Grade A Steel: Specifications & Listings

ASTM A588 A588 Grade A: High strength low alloy weathering steel with atmospheric corrosion resistance 4x that of plain carbon steel. Used for bridges, transmission towers and exposed structural applications where painting is not required.

Forms: Plate Category: Structural Steel (Corten / Weathering)
Grade Details
GradeASTM A588 A588 Grade A
Standard ASTM A588
ApplicationsHigh-strength low-alloy structural steel with atmospheric corrosion resistance (weathering steel); bridges, transmission/communication towers, gusset plates, exposed structural applications
Most Active InNorth (Punjab)
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Grade Standard Match
ASTM A588 ASTM A588 Close Alternative
CSA G40.21 50W CSA G40.21-13 (R2023) Related Material
ASTM A959 443 ASTM A959:2011 Related Material
IS 1570 (Part 6) 50T8 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) 55T8 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) 60T6 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) 65T6 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) 70T6 IS 1570 (Part 6):1996 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
<=0.19 0.80-1.25 0.30-0.65 <=0.040 <=0.050 0.25-0.40 0.40-0.65 <=0.40
Mechanical Properties
Tensile Strength 485 MPa min
Yield Strength 345 MPa min
Elongation 18% min
Hardness 140-190 HB

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ASTM A588 A588 Grade A Plate
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ASTM A588 A588 Grade A Plate
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