BCP235/-C
Steel plates are formed into square sections or a pair of channel sections and their weld seams are arc-welded semi-automatically or automatically in the product of these Cold formed square hollow sections. The products are available in sizes up to 1,000 x 1,000 mm in side lengths and 40 mm in thickness. (Certification No. MSTL-0399)
Product Specifications
1. Mechanical properties
| Product | Tensile test | Impact test [No. 4, longitudinal] |
|||||
|---|---|---|---|---|---|---|---|
| Thickness (mm) |
Yield strength (N/mm²) |
Tensile strength (N/mm²) |
Yield ratio (%) |
Elongation [No. 1A] (%) |
Test temperature (℃) |
Charpy impact energy(J) | |
| BCP235 and BCP235-C |
16 | 235≦ ≦355 |
400≦ ≦510 |
≦80 | 18≦ | 0 | 27≦ |
| 16＜ｔ≦40 | |||||||
| 22≦ | |||||||
1. The specifications of the tensile test and impact test were determined based on the test report of steel plates.
2. Chemical composition
| Product | C | Si | Mn | P | S | Total N | Carbon equivalent | Weld crack sensitivity composition |
|---|---|---|---|---|---|---|---|---|
| BCP235 | ≦0.20 | ≦0.35 | 0.60≦ ≦1.40 |
≦0.030 | ≦0.015 | ≦0.006 | ≦0.36 | ≦0.26 |
| BCP235-C | ≦0.20 | ≦0.35 | 0.60≦ ≦1.40 |
≦0.020 | ≦0.008 | ≦0.006 | ≦0.36 | ≦0.26 |
* Unit (%)
1. The specifications of chemical composition were determined based on the test report of steel plates.
2. Alloy elements other than those specified above may be added, as needed.
3. Total N may be contained up to 0.009% if free N is 0.006% or less after elements such as Al have been added to immobilize N.
4. Carbon equivalent can be calculated with cast analysis and the following equation.
Carbon equivalent
Ceq (%) = C + Mn/6 + Si/24 + Ni/40 + Cr/5 + Mo/4 + V/14
5. Upon agreement between the parties concerned with delivery, weld crack sensitivity composition can be used instead of carbon equivalent. In this case, the weld crack sensitivity composition can be calculated with cast analysis and the following equation. Weld crack sensitivity composition
Pcm (%) = C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B
3. Manufacturing size
| Size/Thickness(mm) | 16 | 19 | 22 | 25 | 28 | 32 | 36 | 40 |
|---|---|---|---|---|---|---|---|---|
| 400×400 | ○ | ○ | ○ | ○ | ||||
| 450×450 | ○ | ○ | ○ | ○ | ○ | |||
| 500×500 | ○ | ○ | ○ | ○ | ○ | ○ | ||
| 550×550 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |
| 600×600 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 650×650 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 700×700 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 750×750 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 800×800 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 850×850 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 900×900 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| 950×950 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |
| 1000×1000 | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
