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Wholesale Mild Sae 1006 1008 1017 Carbon Steel Plate Carbon Steel
Sheet
The main materials used to make carbon steel pipe are Q235, 20 #,
35 #, 45 #, and 16 mn. The main executive standards include
national standards, American standards, Japanese standards, etc.
The national standards include the standards of the Ministry of
Chemical Industry, Sinopec pipe fittings standards, and power pipe
fittings standards. Carbon steel pipe is made of steel ingot or
solid round steel by piercing and then hot rolling, cold rolling,
or cold drawing.
Q235 is divided into four levels: A, B, C, D
| Chemical Composition | |||||
|---|---|---|---|---|---|
| Grade | C | Mn | Si | S | P |
| Q235A | ≤0.22% | ≤1.4% | ≤0.35% | ≤0.050 | ≤0.045 |
| Q235B | ≤0.20% | ≤1.4% | ≤0.35% | ≤0.045 | ≤0.045 |
| Q235C | ≤0.17% | ≤1.4% | ≤0.35% | ≤0.040 | ≤0.040 |
| Q235D | ≤0.17% | ≤1.4% | ≤0.35% | ≤0.035 | ≤0.035 |
| Mechanical Properties | |||
|---|---|---|---|
| Grade | Yield Strength | Tensile Strength | Elongation % |
| Q235 Steel | 235 Mpa | 370-500 Mpa | 26 |
Q235AQ235B belongs to ordinary low-carbon steel, and Q235C/Q235D belongs to high-quality low-carbon steel.
The impact toughness test uses Charpy ∨-shaped notched specimens. The impact toughness index is AKV.
For the above-mentioned grades B, C, and D steels, they are required to reach AKV≥27J under their respective temperature requirements. Therefore, the four ranks are ranked as A<B<C<D, and Q235D is the best.
Because q235 has good welding performance, good plasticity, toughness, and certain strength, it is often rolled into thin plates, steel bars, welded steel pipes, etc., used in bridges, buildings, and other structures and the manufacture of ordinary screws, nuts, and other parts. And Q235 C and Q235 D grade steel can also be used as some professional steel.
Chinese standard Q235, the tensile strength is 370~500 MPa, and the yield strength is 235MPa.
Japanese standard SS400, the tensile strength is 400~510 MPa, and the yield strength is 245Mpa.
American Standard A36, the tensile strength is 58~80 Ksi (about 400~550MPa), and the yield strength is 36 Ksi (about 250MPa).
Because the mechanical properties of these three grades are similar, they can be replaced within a certain range.
