Steels_ Metallurgy and Applications, Third Edition

Low-carbon strip steels 91

Table 1.8

.........

Coating l)

BS EN 10142:1991 Coating masses

..... = ........................

Coating mass in g/m 2, including both Surfaces 2~

min

Triple spot test 3) ....... Single spot test 3)

100 100 85

140 140 120

200 200 170

225 225 195

275 275 235

350 350 300

450 450 385

600 600 510

2) The coatings available for the individual steel grades are give in tables 2

and 3.

2) The coating mass of 100 g/m 2 (including both surfaces) corresponds to

a coating thickness of approximately 7.1 tt m per surface.

3) See 7.4.4 and 7.5.3.

l~able 1.9 BS EN 10142:1991 List of corresponding desig-

nations

,, , - .............

Designation according to EN 10142-,41" 1995 Designation

according to

EN 10142:1990

Steel Steel

name number

DX51D 1.0226

DX51D 1.0226

DX52D 1.0350

DX52D 1.0350

DX53D 1.0355

DX53D 1.0355

DX54D 1.0306

DX54D 1.0306

Symbol for the Steel name

type of hot-dip

coating

+Z Fe P 02 G Z

+ZF Fe P 02 G ZF

+Z FeP03 GZ

+ZF Fe P 03 G ZF

+Z Fe P 05 G Z

+ZF Fe P 05 G ZF

+Z FeP06GZ

+ZF Fe P 06 G ZF

designated Fe PO1 to FE P06, i.e. those adopted in BS EN 10130:1991 (see
Table 1.3). However, BS EN 10142:1991 was amended in 1995 and the Fe
P0 system of designation was changed to the DX 51D/DX 54D style shown in
Table 1.9. The corresponding designations under both systems are identified in
Table 1.9.
Electro-galvanized grades are specified in BS EN 10152: 1994.

Other hot dip coatings

Whereas galvanneal strip has a Zn-Fe coating which is produced by diffusion
from a plain zinc layer, zinc alloy coatings are also deposited directly onto the
steel.