Seamless Pipe carbon Steel and Tube Hot Sale High Quality Q355 Carbon Steel Seamless Pipe
Seamless Pipe carbon Steel and Tube Hot Sale High Quality Q355 Carbon Steel Seamless Pipe
Q355 Steel (Q355B Q355C Q355D)
Q355 steel is a Chinese low alloy high strength structural steel, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa for steel thickness ≤16mm, and tensile strength is 470-630 Mpa.
Q355 Steel Chemical Composition (Hot rolled)
| Steel Grade | Quality Grade | C % (≤) | Si % (≤) | Mn (≤) | P (≤) | S (≤) | Cr (≤) | Ni (≤) | Cu (≤) | N (≤) |
| Q355 | Q355B | 0.24 | 0.55 | 1.6 | 0.035 | 0.035 | 0.30 | 0.30 | 0.40 | 0.012 |
| Q355C | 0.20 | 0.030 | 0.030 | 0.012 | ||||||
| Q355D | 0.20 | 0.025 | 0.025 | – |
Carbon Equivalent (CEV)
Based on smelting analysis, steel delivered in hot rolled state.
| CEV (Mass fraction ≤%); Nominal thickness or diameter (d) | ||||||
| Steel Grade | Quality Grade | ≤ 30 | 30 < d ≤ 63 | 63 < d ≤ 150 | 150 < d ≤ 250 | 250 < d ≤ 400 |
| Q355 | Q355B | 0.45 (CEV) | 0.47 | 0.47 | 0.49 | – |
| Q355C | – | |||||
| Q355D |
0.49 |
|||||
Q355 Mechanical Properties (Hot rolled)
Notes:
1 MPa = 1 N/mm2
1 GPa = 1 kN/mm2
| Yield Strength (≥N/mm2), Thickness or Dia. (d) in mm | ||||||||||
| Steel Grade | Quality Level | d≤16 | 16< d ≤40 | 40 < d ≤63 | 63 < d ≤ 80 | 80< d ≤ 100 | 100< d≤ 150 | 150 < d≤ 200 | 200 < d ≤ 250 | 250 < d ≤ 400 |
| Q355 | Q355B | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | – |
| Q355C | – | |||||||||
| Q355D | 265 | |||||||||
| Tensile Strength (N/mm2), Dia. (d) mm | |||||
| Steel Grade | Quality Level | d≤100 | 100 < d ≤ 150 | 150 < d ≤ 250 | 250 < d ≤ 400 |
| Q355 | Q355B | 470 – 630 | 450 – 600 | 450 – 600 | – |
| Q355C | – | ||||
| Q355D | 450 – 600 | ||||
Q355 Steel Elongation
| Dia. (d) mm; Elongation (%) | ||||||
| Sample direction | d≤40 | 40 < d ≤ 63 | 63 < d ≤ 100 | 100 < d ≤ 150 | 150 < d≤ 200 | 250 < d ≤ 400 |
| Horizontal | 20 | 19 | 18 | 18 | 17 | 17 |
| Vertical | 22 | 21 | 20 | 18 | 17 | 17 |
Payment Terms
1.Payment: T/T, L/C, Western Union, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.
2.MOQ: 1pcs
3.Warranty : 3 years
4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)
2)as customer's requirement
Why choose us?
(1) The leading exporter in China special steel industry.
(2) Large stocks for various sizes, fast delivery date.
(3) Good business relationship with China famous factories.
(4) More than 7 years steel exporting experience.
(5) Good after-sales service guarantee.
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