Related grades: St37-2G, St44-3G

St52-3G automobile carbon structural steels are featured with good comprehensive mechanical performance (strength and percent elongation, etc.) and process performance (bending ), high  dimensional accuracy and excellent welding performance. They are suitable to manufacturing structural members with simple processing and may be used as some structural parts for automobiles, such as car body frames, middle base plates and various reinforcement plates.

St52-3G automobile carbon structural steel size:


Steel grade

Nominal thickness

Nominal width

St52-3G

1.2~2.0

700~1250

St52-3G automobile carbon structural steel mechanical and process performances:


Steel grade

Yield strengtha
MPa

Tensile strength Mpa

After Breakage Percent Elongation (L0=80mm, b=20mm)%≥

180°bending test (b≥20mm)

Bending center diameter

St52-3G

325

510~680

16

1a

a. taking RP0.2 in case of indistinct yield, otherwise ReL。

St52-3Gautomobile carbon structural steel surface quality:


Grade

Code No.

Features

Relatively high-grade finishing surface

FB(O3)

It is allowed for the existence of a few surface defects which not affect forming and coating & plating adhesiveness such as minor scratch, impression, pit , roll mark and oxidation tint.

High-grade finishing surface

FC(O4)

One side of relatively good quality is free from any remarkable defect visible and the other side must reach FB requirement at least.