SPFC390

Alloy Steel

SPFC390

JIS G 3141 cold-rolled steel SPFC390.

Chemical Composition (%)

C0.1
SI0.15
MN0.6
P0.035
S0.035

Mechanical Properties

Tensile:≥450 MPa;Yield:≥280 MPa;Elongation:≥20%

Chinese Standard

JIS G 3141

Equivalent Grades

JIS SPFC390

Applications

Automotive, appliances

Available Forms

Sheet

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).

Request a Quote Back to category

Comments 0