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Alloy Steel

High-quality carbon structural steel. (GOST 1050; equiv GB 20 / AISI 1020 / DIN C22 / JIS S20C). Nominal values—confirm mill certificate.

Chemical Composition (%)

C	0.17
SI	0.17
MN	0.35

Mechanical Properties

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

Chinese Standard

GOST 1050 08

Equivalent Standards

GB 20 / DIN C22

Equivalent Grades

AISI 1020 / JIS S20C

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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