Specification

BS 4360

(1986)

Product

Thicknesses

Dimensional Tolerances

Plates

6.00 £ e £ 80.,00 mm

BS 4360

Application

Structural Material

Chemical Composition %

Grade

50 C

50 D

0.20

0.18

0.22

0.20

0.040

0.040

0.040

0.040

0.50

0.10/0.50

( 1 )

0.003/0.100

0.003/0.100

( 1 )

0.003/0.100

0.003/0.100

( 1 )

0.100

0.100

( 1 )

0.020

0.020

0.20/0.35 or 0.35/0.50

-

Deoxidation

Si and Al Killed

Si and Al Killed

Mechanical Properties

e £ 16.00 mm

355

355

16.00 < e £ 40.00 mm

345

345

Minimum Yield Point

40.00 < e £ 63.00 mm

340

340

(TT) MPa

63.00 < e £ 100.00 mm

325

325

100.00 < e £ 150.00 mm

305

305

e £ 63.00 mm

490/640

490/640

Tensile Strength

63.00 < e £ 100.00 mm

480/640

480/640

MPa

100.00 < e £ 150.00 mm

460/640

460/640

Lo =

e £ 9.00 mm

15

15

Minimum

200 mm.

9.00 < e £ 150.00 mm

18

18

Elongation %

Lo =

e £ 9.00 mm

16

16

50 mm.

9.00 < e £ 150.00 mm

20

20

Lo= 5.65Ö So

20

20

Temperature °C

Zero

- 20

6.00 £ e £ 100.00 mm

27

27

As Rolled or Normalized

Normalized or TMCR (3)

Notes

1) Grain refining elements are used as follows: Nb or V or Al or Nb + V, with one of the ranges being utilized according to the specified on the table.

2) For every Carbon 0.01% decrease it is allowed a Manganese 0.06% increase and vice versa, with Mn being

1.60% maximum; and Carbon £ 0.22 for grade 50 or Carbon £ 0.20 for grade 50D.

3) TMCR - Thermomechanical Controlled Rolling.

Previous agreement with the client is required.