B400NQR1 Weathering steel round bar, B400NQR1 steel bar Elongation

B400NQR1 Weathering steel round bar which have failed in the mechanical test may be subjected to a retest as specified for final acceptance. The prime advantages of B400NQR1 Weathering steel round bar is that they can be easily machined and have good ductility.B400NQR1 for the manufacture of vehicles, containers, doors, windows and other cold-formed steel members.

B400NQR1 Weathering steel round bar Chemical composition(%)

C≤0.12 Si:0.10-0.40 Mn:0.20-0.50 P≤0.12 S≤0.030 Cu:0.25-0.45 Cr:0.30-0.65 Ni≤0.50

B400NQR1 steel bar Mechanical property

Yield strength MPa ≥260

Tensile strength MPa ≥400

Elongation% (L0 = 50mm b = 25mm) ≥27

80 ° bending test apex diameter: 1a

B400NQR1 steel bar Marking should in accordance with the agreement between the purchaser and the supplier, all of these following markings are available:

Dimensions

Number of sheets or mass

Classification symbol

Symbol of temper grade

Symbol of surface finish

Manufacture number and inspection number

Manufacturer's name or its identifying brand

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