Related products : B180H2 steel , B180H1 steel , B140H1 steel , B410LA steel , B170P1 steel , B180P2 steel , B210P1 steel , B220P2 steel , B250P1 steel

B340LA

B340LA high-strength low alloy steel is low carbon steel added with a little alloy elements such as niobium and/or titanium, which will be allowed to form carbide and nitride with carbon and nitrogen and separate these carbide and nitride out of ferritic matrix to increase steel strength. With excellent formability and relatively high strength, it is mainly used for manufacturing structural parts of automobiles such as chairs and cross beams.

B340LA high-strength low alloy steel product sizes:
Nominal thickness: 0.45mm~2.0mm, nominal width: 800mm~1850mm

B340LA high-strength low alloy steel mechanical performances:


Steel grade

Yield strengtha
MPa

Tensile strength Mpa

After Breakage Percent Elongation (L0=50mm, b=25mm)%≥

180°bending test(b≥20mm)

Nominal thickness mm

0.60~<1.0

1.0~<1.6

1.6

Bending center diameter

B340LA

340~460

440

22

24

26

0.5a

  1. taking RP0.2 in case of indistinct yield, otherwise ReL。
  2. using P14 sample of GB/T228

B340LA high-strength low alloy 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 will 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 any remarkable defect visible and the other side must reach FB requirements at leasts.