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A871 Type 1 Gr.65

ASTM A871 Type 1 Grade 65 is a high-strength, low-alloy weathering steel designed for structural applications, offering high strength, durability, weldability, and enhanced atmospheric corrosion resistance.
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ASTM A871 Type 1 Grade 65 is a high-strength, low-alloy structural steel with weathering characteristics for improved resistance to atmospheric corrosion. It is suitable for bridges, towers, structural frameworks, and other demanding outdoor applications. Grade 65 provides a minimum yield strength of 65 ksi (450 MPa) and combines high strength, toughness, weldability, and weather resistance for long-term structural performance. Low Alloy High Strength Atmospheric Corrosion Resisting Steel Delivery Condition: As Rolled / Normalized / Quenched & Tempered
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Typical specification data

Technical reference

Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.

Chemical Properties
C Si Mn P S Cr Ni Cu Mo V Nb
0.17/0.20 0.15/0.65 0.50/1.35 0.030 max 0.030 max 0.40/0.70 0.40/0.50 0.20/0.50 0.10 max 0.01/0.10 0.05 max
Mechanical Properties
Property Value
Charpy impact energy 23°C 20J
Elongation (50mm/2") 17%
Tensile Strength 450 MPa / 65 ksi
Yield Strength 550 MPa / 80 ksi
Poisson's ratio 23°C 0.29

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