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Specification of Q345B Galvanized steel coils
| specifications | Wall thickness | specifications | Wall thickness | specifications | Wall thickness | specifications | Wall thickness |
| DN15 | 1.8 | DN40 | 1.8 | DN80 | 2.2 | DN150 | 2.5 |
| 2 | 2 | 2.5 | 2.75 | ||||
| 2.2 | 2.2 | 2.75 | 3 | ||||
| 2.5 | 2.5 | 3 | 3.25 | ||||
| 2.75 | 2.75 | 3.25 | 3.5 | ||||
| DN20 | 1.8 | 3 | 3.5 | 3.75 | |||
| 2 | 3.25 | 3.74 | 4 | ||||
| 2.2 | 3.5 | 4 | 4.25 | ||||
| 2.5 | DN50 | 1.8 | DN100 | 2 | DN200 | 2.75 | |
| 2.75 | 2 | 2.2 | 3 | ||||
| DN25 | 1.8 | 2.2 | 2.5 | 3.25 | |||
| 2 | 2.5 | 2.75 | 3.5 | ||||
| 2.2 | 2.75 | 3 | 3.75 | ||||
| 2.5 | 3 | 3.25 | 4 | ||||
| 2.75 | 3.25 | 3.5 | 4.25 | ||||
| 3 | 3.5 | 3.75 | 4.5 | ||||
| 3.25 | DN65 | 2.2 | 4 | 4.75 | |||
| DN32 | 1.8 | 2.5 | 4.25 | 5 | |||
| 2 | 2.75 | DN125 | 2.5 | DN200 | 5.5 | ||
| 2.2 | 3 | 2.75 | DN200 | 5.75 | |||
| 2.5 | 3.25 | 3 | DN200 | 6 | |||
| 2.75 | 3.5 | 3.25 | 273-2020 | 3.75-40 | |||
| 3 | 3.75 | 3.5 | |||||
| 3.25 | 3.75 | ||||||
| 4 |
Ingredient list Of Q345B Galvanized steel
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| Q235 | Min. | / | / | / | / | / | / | / | ||
| Max. | 8 | 24 | 15 | 12 | 10 | |||||
| 304L | Min. | / | / | / | / | / | 18 | / | 9 | / |
| Max. | 0.03 | 2 | 1 | 0.045 | 0.03 | 20 | 11 | |||
| 304H | Min. | 0.04 | / | / | 0.045 | / | 18 | / | 8 | / |
| Max. | 0.1 | 2 | 0.75 | / | 0.03 | 20 | 10.5 | |||
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | ||||||
| (MPa)聽 | 0.2% Proof (MPa)聽 | (% in 50mm) | Rockwell B | Brinell | ||||||
| (HR B) | (HB) | |||||||||
| 304 | 515 | 205 | 40 | 92 | 201 | |||||
| 304L | 515 | 205 | 40 | 90 | 187 | |||||
| 304H | 515 | 205 | 40 | 92 | 201 | |||||
Processing Technology Of Q345B Galvanized steel
In order to improve the corrosion resistance of steel pipe, the ordinary steel pipe was galvanized. Galvanized steel pipe is divided into hot dip galvanized and electric dip galvanized, hot dip galvanized layer thick, electric dip galvanized cost is low, the surface is not very smooth. Oxygen blowing welding pipe: used for oxygen blowing steel pipe, generally with small diameter welded steel pipe, specifications by 3/8-2 inches eight kinds. Made of 08, 10, 15, 20 or 195-Q235 steel strip, in order to prevent corrosion, some of the effective aluminizing treatment.
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