Baosteel 5-meter heavy plate mill was established in March 2005, with the annual production capacity of 1.8 million tons.
Its main production equipments are provided by German SMS and SIE. The 5-meter heavy plate mill extensively adopts the state
of-the-art heavy plate technologies and facilities in the world, including high precision of rolling technique, TMCP/DQ technology,
automatic control technique for strong leveling process, automatic cutting technique, automatic online ultrasonic detective tech
nique, non-oxidation heat treatment technique, pre-leveler, comprehensive plate surface measuring apparatus and automatic
marking, etc. In this way, requirements of high dimensional accuracy and mechanical property for high grade heavy steel plates
from customers can be satisfied.
The heavy plate mill can produce high strength machinery structure steel, hull structural steel plates, offshore structural steel
plates, oil and gas transportation pipeline steel plates, high strength construction structural steel plates and steel plates for boilers
and pressure vessels. In the past decade Baosteel has exerted utmost effort to develop and supply high-quality heavy plates to
meet customers’ demands. We are continuously expanding our products types, improving our products quality.
A Variety of Available Grades
A total of 9 grades are available: the basic series with 2 grades of hardness, and the alloy series with 4 grades, and the easy weld
ing series with 3 grades, providing a complete product line that can meet a wide range of applications.
Basic Series
This series consists of grades pro
duced with the main emphasis on
their hardness levels, the chemical
composition being basically simple
while the addition of other alloying
elements is restrained.
Alloy Series
This series contains alloying elements
in greater quantities than the basic
series. Both the prescribed hardness
and low-temperature toughness are
guaranteed.
Easy Welding Series
This series contains restrained con
tents of carbon and alloying elements.
The value of CEV is lower than the
standard series and the alloy series,
which is good to welding.
Grade and Specifications
| Typical Grade and Specifications for B-HARD |
| Grade |
Specifications |
| Thickness, mm |
Width, mm |
Length, mm |
| B-HARD360A/B (Basic type) |
6-90 |
1300-4200 |
6000-25000 |
| B-HARD360C/D/E (Alloy type) |
6-80 |
1300-4200 |
6000-25000 |
| B-HARD360CFA/B/C/D/E (Easy welding) |
6--20 |
1300-4200 |
6000-25000 |
| B-HARD400A/B (Basic type) |
6-90 |
1300-4200 |
6000-25000 |
| B-HARD400C/D/E (Alloy type) |
6-80 |
1300-4200 |
6000-25000 |
| B-HARD400CFA/B/C/D/E (Easy welding) |
6--20 |
1300-4200 |
6000-25000 |
| B-HARD450A/B/C/D/E (Alloy type) |
6-75 |
1300-4200 |
6000-25000 |
| B-HARD450CFA/B/C/D/E (Easy welding) |
6--20 |
1300-4200 |
6000-25000 |
| B-HARD500A/B/C/D/E (Alloy type) |
6-75 |
1300-4200 |
6000-25000 |
Chemical Composition
| Typical Chemical Composition for B-HARD |
| Grade |
Chemical Composition wt.% |
CEVa |
| C≤ |
Si≤ |
Mn≤ |
P≤ |
S≤ |
Cr≤ |
Mo≤ |
Ni≤ |
Ti≤ |
Alt≥ |
B≤ |
≤ |
| B-HARD360 (Basic type) |
0.2 |
0.6 |
1.6 |
0.025 |
0.015 |
0.8 |
0.3 |
0.2 |
0.05 |
0.015 |
0.005 |
0.55 |
| B-HARD360 (Alloy type) |
0.2 |
0.6 |
1.6 |
0.025 |
0.015 |
0.8 |
0.5 |
0.8 |
0.05 |
0.015 |
0.005 |
0.58 |
| B-HARD360CF (Easy welding) |
0.18 |
0.6 |
1.8 |
0.025 |
0.015 |
0.6 |
0.3 |
0.5 |
0.05 |
0.015 |
0.005 |
0.52 |
| B-HARD400 (Basic type) |
0.2 |
0.6 |
1.6 |
0.025 |
0.015 |
0.8 |
0.3 |
0.2 |
0.05 |
0.015 |
0.005 |
0.56 |
| B-HARD400 (Alloy type) |
0.2 |
0.6 |
1.6 |
0.025 |
0.015 |
0.8 |
0.5 |
0.8 |
0.05 |
0.015 |
0.005 |
0.6 |
| B-HARD400CF (Easy welding) |
0.18 |
0.6 |
1.8 |
0.025 |
0.015 |
0.6 |
0.3 |
0.5 |
0.05 |
0.015 |
0.005 |
0.53 |
| B-HARD450 (Alloy type) |
0.25 |
0.7 |
1.6 |
0.02 |
0.01 |
1 |
0.8 |
0.8 |
0.05 |
0.015 |
0.005 |
0.65 |
| B-HARD450CF (Easy welding) |
0.22 |
0.7 |
1.6 |
0.02 |
0.01 |
0.6 |
0.5 |
0.5 |
0.05 |
0.015 |
0.005 |
0.63 |
| B-HARD500 (Alloy type) |
0.3 |
0.7 |
1.6 |
0.02 |
0.01 |
1.5 |
1 |
1 |
0.05 |
0.015 |
0.005 |
0.7 |
