Alloy20

Alloy Steel

Alloy20

High-quality carbon structural steel. (UNS N08020; equiv Alloy 20 / UNS N08020). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.17
SI0.17
MN0.35

Mechanical Properties

Tensile:≥410 MPa;Yield:≥245 MPa;Elong:≥25%

Equivalent Grades

UNS N08020 Alloy20 / Alloy 20 / UNS N08020

Applications

优质碳素结构钢。,"Bar

Available Forms

Forging"

Uses

Low-carbon grade used for welded structures, shafts, pins, bolts, nuts, seamless tubes and general engineering components where moderate strength and good weldability are required. Commonly supplied as bar, plate, sheet, tube and forging.

Heat Treatment

Typically normalized (880–920 °C, air cool) or carburized (900–930 °C) for case-hardening grades, then quenched and tempered at 150–200 °C.

Precautions

Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).

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